15 May, 2019
3 commits
-
Most architectures do not need the memblock memory after the page
allocator is initialized, but only few enable ARCH_DISCARD_MEMBLOCK in the
arch Kconfig.Replacing ARCH_DISCARD_MEMBLOCK with ARCH_KEEP_MEMBLOCK and inverting the
logic makes it clear which architectures actually use memblock after
system initialization and skips the necessity to add ARCH_DISCARD_MEMBLOCK
to the architectures that are still missing that option.Link: http://lkml.kernel.org/r/1556102150-32517-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport
Acked-by: Michael Ellerman (powerpc)
Cc: Russell King
Cc: Catalin Marinas
Cc: Will Deacon
Cc: Richard Kuo
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Geert Uytterhoeven
Cc: Ralf Baechle
Cc: Paul Burton
Cc: James Hogan
Cc: Ley Foon Tan
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Yoshinori Sato
Cc: Rich Felker
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: "H. Peter Anvin"
Cc: Eric Biederman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All callers of arch_remove_memory() ignore errors. And we should really
try to remove any errors from the memory removal path. No more errors are
reported from __remove_pages(). BUG() in s390x code in case
arch_remove_memory() is triggered. We may implement that properly later.
WARN in case powerpc code failed to remove the section mapping, which is
better than ignoring the error completely right now.Link: http://lkml.kernel.org/r/20190409100148.24703-5-david@redhat.com
Signed-off-by: David Hildenbrand
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Yoshinori Sato
Cc: Rich Felker
Cc: Dave Hansen
Cc: Andy Lutomirski
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: "H. Peter Anvin"
Cc: Michal Hocko
Cc: Mike Rapoport
Cc: Oscar Salvador
Cc: "Kirill A. Shutemov"
Cc: Christophe Leroy
Cc: Stefan Agner
Cc: Nicholas Piggin
Cc: Pavel Tatashin
Cc: Vasily Gorbik
Cc: Arun KS
Cc: Geert Uytterhoeven
Cc: Masahiro Yamada
Cc: Rob Herring
Cc: Joonsoo Kim
Cc: Wei Yang
Cc: Qian Cai
Cc: Mathieu Malaterre
Cc: Andrew Banman
Cc: Greg Kroah-Hartman
Cc: Ingo Molnar
Cc: Mike Travis
Cc: Oscar Salvador
Cc: "Rafael J. Wysocki"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
arch_add_memory, __add_pages take a want_memblock which controls whether
the newly added memory should get the sysfs memblock user API (e.g.
ZONE_DEVICE users do not want/need this interface). Some callers even
want to control where do we allocate the memmap from by configuring
altmap.Add a more generic hotplug context for arch_add_memory and __add_pages.
struct mhp_restrictions contains flags which contains additional features
to be enabled by the memory hotplug (MHP_MEMBLOCK_API currently) and
altmap for alternative memmap allocator.This patch shouldn't introduce any functional change.
[akpm@linux-foundation.org: build fix]
Link: http://lkml.kernel.org/r/20190408082633.2864-3-osalvador@suse.de
Signed-off-by: Michal Hocko
Signed-off-by: Oscar Salvador
Cc: Dan Williams
Cc: David Hildenbrand
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2019
3 commits
-
Pull networking updates from David Miller:
"Highlights:1) Support AES128-CCM ciphers in kTLS, from Vakul Garg.
2) Add fib_sync_mem to control the amount of dirty memory we allow to
queue up between synchronize RCU calls, from David Ahern.3) Make flow classifier more lockless, from Vlad Buslov.
4) Add PHY downshift support to aquantia driver, from Heiner
Kallweit.5) Add SKB cache for TCP rx and tx, from Eric Dumazet. This reduces
contention on SLAB spinlocks in heavy RPC workloads.6) Partial GSO offload support in XFRM, from Boris Pismenny.
7) Add fast link down support to ethtool, from Heiner Kallweit.
8) Use siphash for IP ID generator, from Eric Dumazet.
9) Pull nexthops even further out from ipv4/ipv6 routes and FIB
entries, from David Ahern.10) Move skb->xmit_more into a per-cpu variable, from Florian
Westphal.11) Improve eBPF verifier speed and increase maximum program size,
from Alexei Starovoitov.12) Eliminate per-bucket spinlocks in rhashtable, and instead use bit
spinlocks. From Neil Brown.13) Allow tunneling with GUE encap in ipvs, from Jacky Hu.
14) Improve link partner cap detection in generic PHY code, from
Heiner Kallweit.15) Add layer 2 encap support to bpf_skb_adjust_room(), from Alan
Maguire.16) Remove SKB list implementation assumptions in SCTP, your's truly.
17) Various cleanups, optimizations, and simplifications in r8169
driver. From Heiner Kallweit.18) Add memory accounting on TX and RX path of SCTP, from Xin Long.
19) Switch PHY drivers over to use dynamic featue detection, from
Heiner Kallweit.20) Support flow steering without masking in dpaa2-eth, from Ioana
Ciocoi.21) Implement ndo_get_devlink_port in netdevsim driver, from Jiri
Pirko.22) Increase the strict parsing of current and future netlink
attributes, also export such policies to userspace. From Johannes
Berg.23) Allow DSA tag drivers to be modular, from Andrew Lunn.
24) Remove legacy DSA probing support, also from Andrew Lunn.
25) Allow ll_temac driver to be used on non-x86 platforms, from Esben
Haabendal.26) Add a generic tracepoint for TX queue timeouts to ease debugging,
from Cong Wang.27) More indirect call optimizations, from Paolo Abeni"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1763 commits)
cxgb4: Fix error path in cxgb4_init_module
net: phy: improve pause mode reporting in phy_print_status
dt-bindings: net: Fix a typo in the phy-mode list for ethernet bindings
net: macb: Change interrupt and napi enable order in open
net: ll_temac: Improve error message on error IRQ
net/sched: remove block pointer from common offload structure
net: ethernet: support of_get_mac_address new ERR_PTR error
net: usb: smsc: fix warning reported by kbuild test robot
staging: octeon-ethernet: Fix of_get_mac_address ERR_PTR check
net: dsa: support of_get_mac_address new ERR_PTR error
net: dsa: sja1105: Fix status initialization in sja1105_get_ethtool_stats
vrf: sit mtu should not be updated when vrf netdev is the link
net: dsa: Fix error cleanup path in dsa_init_module
l2tp: Fix possible NULL pointer dereference
taprio: add null check on sched_nest to avoid potential null pointer dereference
net: mvpp2: cls: fix less than zero check on a u32 variable
net_sched: sch_fq: handle non connected flows
net_sched: sch_fq: do not assume EDT packets are ordered
net: hns3: use devm_kcalloc when allocating desc_cb
net: hns3: some cleanup for struct hns3_enet_ring
... -
Pull audit updates from Paul Moore:
"We've got a reasonably broad set of audit patches for the v5.2 merge
window, the highlights are below:- The biggest change, and the source of all the arch/* changes, is
the patchset from Dmitry to help enable some of the work he is
doing around PTRACE_GET_SYSCALL_INFO.To be honest, including this in the audit tree is a bit of a
stretch, but it does help move audit a little further along towards
proper syscall auditing for all arches, and everyone else seemed to
agree that audit was a "good" spot for this to land (or maybe they
just didn't want to merge it? dunno.).- We can now audit time/NTP adjustments.
- We continue the work to connect associated audit records into a
single event"* tag 'audit-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit: (21 commits)
audit: fix a memory leak bug
ntp: Audit NTP parameters adjustment
timekeeping: Audit clock adjustments
audit: purge unnecessary list_empty calls
audit: link integrity evm_write_xattrs record to syscall event
syscall_get_arch: add "struct task_struct *" argument
unicore32: define syscall_get_arch()
Move EM_UNICORE to uapi/linux/elf-em.h
nios2: define syscall_get_arch()
nds32: define syscall_get_arch()
Move EM_NDS32 to uapi/linux/elf-em.h
m68k: define syscall_get_arch()
hexagon: define syscall_get_arch()
Move EM_HEXAGON to uapi/linux/elf-em.h
h8300: define syscall_get_arch()
c6x: define syscall_get_arch()
arc: define syscall_get_arch()
Move EM_ARCOMPACT and EM_ARCV2 to uapi/linux/elf-em.h
audit: Make audit_log_cap and audit_copy_inode static
audit: connect LOGIN record to its syscall record
... -
Pull driver core/kobject updates from Greg KH:
"Here is the "big" set of driver core patches for 5.2-rc1There are a number of ACPI patches in here as well, as Rafael said
they should go through this tree due to the driver core changes they
required. They have all been acked by the ACPI developers.There are also a number of small subsystem-specific changes in here,
due to some changes to the kobject core code. Those too have all been
acked by the various subsystem maintainers.As for content, it's pretty boring outside of the ACPI changes:
- spdx cleanups
- kobject documentation updates
- default attribute groups for kobjects
- other minor kobject/driver core fixesAll have been in linux-next for a while with no reported issues"
* tag 'driver-core-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (47 commits)
kobject: clean up the kobject add documentation a bit more
kobject: Fix kernel-doc comment first line
kobject: Remove docstring reference to kset
firmware_loader: Fix a typo ("syfs" -> "sysfs")
kobject: fix dereference before null check on kobj
Revert "driver core: platform: Fix the usage of platform device name(pdev->name)"
init/config: Do not select BUILD_BIN2C for IKCONFIG
Provide in-kernel headers to make extending kernel easier
kobject: Improve doc clarity kobject_init_and_add()
kobject: Improve docs for kobject_add/del
driver core: platform: Fix the usage of platform device name(pdev->name)
livepatch: Replace klp_ktype_patch's default_attrs with groups
cpufreq: schedutil: Replace default_attrs field with groups
padata: Replace padata_attr_type default_attrs field with groups
irqdesc: Replace irq_kobj_type's default_attrs field with groups
net-sysfs: Replace ktype default_attrs field with groups
block: Replace all ktype default_attrs with groups
samples/kobject: Replace foo_ktype's default_attrs field with groups
kobject: Add support for default attribute groups to kobj_type
driver core: Postpone DMA tear-down until after devres release for probe failure
...
07 May, 2019
4 commits
-
Pull mmiowb removal from Will Deacon:
"Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb())Remove mmiowb() from the kernel memory barrier API and instead, for
architectures that need it, hide the barrier inside spin_unlock() when
MMIO has been performed inside the critical section.The only relatively recent changes have been addressing review
comments on the documentation, which is in a much better shape thanks
to the efforts of Ben and Ingo.I was initially planning to split this into two pull requests so that
you could run the coccinelle script yourself, however it's been plain
sailing in linux-next so I've just included the whole lot here to keep
things simple"* tag 'arm64-mmiowb' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (23 commits)
docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread
docs/memory-barriers.txt: Fix style, spacing and grammar in I/O section
arch: Remove dummy mmiowb() definitions from arch code
net/ethernet/silan/sc92031: Remove stale comment about mmiowb()
i40iw: Redefine i40iw_mmiowb() to do nothing
scsi/qla1280: Remove stale comment about mmiowb()
drivers: Remove explicit invocations of mmiowb()
drivers: Remove useless trailing comments from mmiowb() invocations
Documentation: Kill all references to mmiowb()
riscv/mmiowb: Hook up mmwiob() implementation to asm-generic code
powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code
ia64/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
sh/mmiowb: Add unconditional mmiowb() to arch_spin_unlock()
m68k/io: Remove useless definition of mmiowb()
nds32/io: Remove useless definition of mmiowb()
x86/io: Remove useless definition of mmiowb()
arm64/io: Remove useless definition of mmiowb()
ARM/io: Remove useless definition of mmiowb()
mmiowb: Hook up mmiowb helpers to spinlocks and generic I/O accessors
... -
Pull locking updates from Ingo Molnar:
"Here are the locking changes in this cycle:- rwsem unification and simpler micro-optimizations to prepare for
more intrusive (and more lucrative) scalability improvements in
v5.3 (Waiman Long)- Lockdep irq state tracking flag usage cleanups (Frederic
Weisbecker)- static key improvements (Jakub Kicinski, Peter Zijlstra)
- misc updates, cleanups and smaller fixes"
* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (26 commits)
locking/lockdep: Remove unnecessary unlikely()
locking/static_key: Don't take sleeping locks in __static_key_slow_dec_deferred()
locking/static_key: Factor out the fast path of static_key_slow_dec()
locking/static_key: Add support for deferred static branches
locking/lockdep: Test all incompatible scenarios at once in check_irq_usage()
locking/lockdep: Avoid bogus Clang warning
locking/lockdep: Generate LOCKF_ bit composites
locking/lockdep: Use expanded masks on find_usage_*() functions
locking/lockdep: Map remaining magic numbers to lock usage mask names
locking/lockdep: Move valid_state() inside CONFIG_TRACE_IRQFLAGS && CONFIG_PROVE_LOCKING
locking/rwsem: Prevent unneeded warning during locking selftest
locking/rwsem: Optimize rwsem structure for uncontended lock acquisition
locking/rwsem: Enable lock event counting
locking/lock_events: Don't show pvqspinlock events on bare metal
locking/lock_events: Make lock_events available for all archs & other locks
locking/qspinlock_stat: Introduce generic lockevent_*() counting APIs
locking/rwsem: Enhance DEBUG_RWSEMS_WARN_ON() macro
locking/rwsem: Add debug check for __down_read*()
locking/rwsem: Micro-optimize rwsem_try_read_lock_unqueued()
locking/rwsem: Move rwsem internal function declarations to rwsem-xadd.h
... -
Pull EFI updates from Ingo Molnar:
"The changes in this cycle were:- Squash a spurious warning when using the EFI framebuffer on a
non-EFI boot- Use DMI data to annotate RAS memory errors on ARM just like we do
on Intel- Followup cleanups for DMI
- libstub Makefile cleanups"
* 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/libstub/arm: Omit unneeded stripping of ksymtab/kcrctab sections
efi: Unify DMI setup code over the arm/arm64, ia64 and x86 architectures
efi/arm: Show SMBIOS bank/device location in CPER and GHES error logs
efifb: Omit memory map check on legacy boot
efi/libstub: Refactor the cmd_stubcopy Makefile command -
Pull unified TLB flushing from Ingo Molnar:
"This contains the generic mmu_gather feature from Peter Zijlstra,
which is an all-arch unification of TLB flushing APIs, via the
following (broad) steps:- enhance the APIs to cover more arch details
- convert most TLB flushing arch implementations to the generic
APIs.- remove leftovers of per arch implementations
After this series every single architecture makes use of the unified
TLB flushing APIs"* 'core-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
mm/resource: Use resource_overlaps() to simplify region_intersects()
ia64/tlb: Eradicate tlb_migrate_finish() callback
asm-generic/tlb: Remove tlb_table_flush()
asm-generic/tlb: Remove tlb_flush_mmu_free()
asm-generic/tlb: Remove CONFIG_HAVE_GENERIC_MMU_GATHER
asm-generic/tlb: Remove arch_tlb*_mmu()
s390/tlb: Convert to generic mmu_gather
asm-generic/tlb: Introduce CONFIG_HAVE_MMU_GATHER_NO_GATHER=y
arch/tlb: Clean up simple architectures
um/tlb: Convert to generic mmu_gather
sh/tlb: Convert SH to generic mmu_gather
ia64/tlb: Convert to generic mmu_gather
arm/tlb: Convert to generic mmu_gather
asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE
asm-generic/tlb, ia64: Conditionally provide tlb_migrate_finish()
asm-generic/tlb: Provide generic tlb_flush() based on flush_tlb_mm()
asm-generic/tlb, arch: Provide generic tlb_flush() based on flush_tlb_range()
asm-generic/tlb, arch: Provide generic VIPT cache flush
asm-generic/tlb, arch: Provide CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
asm-generic/tlb: Provide a comment
26 Apr, 2019
1 commit
-
Two easy cases of overlapping changes.
Signed-off-by: David S. Miller
24 Apr, 2019
1 commit
-
Pull syscall numbering updates from Arnd Bergmann:
"arch: add pidfd and io_uring syscalls everywhereThis comes a bit late, but should be in 5.1 anyway: we want the newly
added system calls to be synchronized across all architectures in the
release.I hope that in the future, any newly added system calls can be added
to all architectures at the same time, and tested there while they are
in linux-next, avoiding dependencies between the architecture
maintainer trees and the tree that contains the new system call"* tag 'syscalls-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
arch: add pidfd and io_uring syscalls everywhere
20 Apr, 2019
1 commit
-
ia64, parisc and sparc just use a copy of the generic version
of asm/sockios.h, and x86 is a redirect to the same file, so we
can just let the header file be generated.Signed-off-by: Arnd Bergmann
Signed-off-by: David S. Miller
15 Apr, 2019
1 commit
-
Add the io_uring and pidfd_send_signal system calls to all architectures.
These system calls are designed to handle both native and compat tasks,
so all entries are the same across architectures, only arm-compat and
the generic tale still use an old format.Acked-by: Michael Ellerman (powerpc)
Acked-by: Heiko Carstens (s390)
Acked-by: Geert Uytterhoeven
Signed-off-by: Arnd Bergmann
10 Apr, 2019
1 commit
-
Signed-off-by: Ingo Molnar
08 Apr, 2019
2 commits
-
The mmiowb() macro is horribly difficult to use and drivers will continue
to work most of the time if they omit a call when it is required.Rather than rely on driver authors getting this right, push mmiowb() into
arch_spin_unlock() for ia64. If this is deemed to be a performance issue,
a subsequent optimisation could make use of ARCH_HAS_MMIOWB to elide
the barrier in cases where no I/O writes were performed inside the
critical section.Acked-by: Linus Torvalds
Signed-off-by: Will Deacon -
Hook up asm-generic/mmiowb.h to Kbuild for all architectures so that we
can subsequently include asm/mmiowb.h from core code.Cc: Masahiro Yamada
Cc: Arnd Bergmann
Acked-by: Linus Torvalds
Signed-off-by: Will Deacon
05 Apr, 2019
3 commits
-
After removing the start and count arguments of syscall_get_arguments() it
seems reasonable to remove them from syscall_set_arguments(). Note, as of
today, there are no users of syscall_set_arguments(). But we are told that
there will be soon. But for now, at least make it consistent with
syscall_get_arguments().Link: http://lkml.kernel.org/r/20190327222014.GA32540@altlinux.org
Cc: Oleg Nesterov
Cc: Kees Cook
Cc: Andy Lutomirski
Cc: Dominik Brodowski
Cc: Dave Martin
Cc: "Dmitry V. Levin"
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Max Filippov # For xtensa changes
Acked-by: Will Deacon # For the arm64 bits
Reviewed-by: Thomas Gleixner # for x86
Reviewed-by: Dmitry V. Levin
Signed-off-by: Steven Rostedt (VMware) -
At Linux Plumbers, Andy Lutomirski approached me and pointed out that the
function call syscall_get_arguments() implemented in x86 was horribly
written and not optimized for the standard case of passing in 0 and 6 for
the starting index and the number of system calls to get. When looking at
all the users of this function, I discovered that all instances pass in only
0 and 6 for these arguments. Instead of having this function handle
different cases that are never used, simply rewrite it to return the first 6
arguments of a system call.This should help out the performance of tracing system calls by ptrace,
ftrace and perf.Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org
Cc: Oleg Nesterov
Cc: Kees Cook
Cc: Andy Lutomirski
Cc: Dominik Brodowski
Cc: Dave Martin
Cc: "Dmitry V. Levin"
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Paul Burton # MIPS parts
Acked-by: Max Filippov # For xtensa changes
Acked-by: Will Deacon # For the arm64 bits
Reviewed-by: Thomas Gleixner # for x86
Reviewed-by: Dmitry V. Levin
Reported-by: Andy Lutomirski
Signed-off-by: Steven Rostedt (VMware) -
Parsing entries in an ACPI table had assumed a generic header
structure. There is no standard ACPI header, though, so less common
layouts with different field sizes required custom parsers to go through
their subtable entry list.Create the infrastructure for adding different table types so parsing
the entries array may be more reused for all ACPI system tables and
the common code doesn't need to be duplicated.Reviewed-by: Rafael J. Wysocki
Acked-by: Jonathan Cameron
Tested-by: Jonathan Cameron
Signed-off-by: Keith Busch
Tested-by: Brice Goglin
Signed-off-by: Greg Kroah-Hartman
03 Apr, 2019
5 commits
-
Currently, we have two different implementation of rwsem:
1) CONFIG_RWSEM_GENERIC_SPINLOCK (rwsem-spinlock.c)
2) CONFIG_RWSEM_XCHGADD_ALGORITHM (rwsem-xadd.c)As we are going to use a single generic implementation for rwsem-xadd.c
and no architecture-specific code will be needed, there is no point
in keeping two different implementations of rwsem. In most cases, the
performance of rwsem-spinlock.c will be worse. It also doesn't get all
the performance tuning and optimizations that had been implemented in
rwsem-xadd.c over the years.For simplication, we are going to remove rwsem-spinlock.c and make all
architectures use a single implementation of rwsem - rwsem-xadd.c.All references to RWSEM_GENERIC_SPINLOCK and RWSEM_XCHGADD_ALGORITHM
in the code are removed.Suggested-by: Peter Zijlstra
Signed-off-by: Waiman Long
Signed-off-by: Peter Zijlstra (Intel)
Acked-by: Linus Torvalds
Cc: Andrew Morton
Cc: Arnd Bergmann
Cc: Borislav Petkov
Cc: Davidlohr Bueso
Cc: H. Peter Anvin
Cc: Paul E. McKenney
Cc: Thomas Gleixner
Cc: Tim Chen
Cc: Will Deacon
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lkml.kernel.org/r/20190322143008.21313-3-longman@redhat.com
Signed-off-by: Ingo Molnar -
As the generic rwsem-xadd code is using the appropriate acquire and
release versions of the atomic operations, the arch specific rwsem.h
files will not be that much faster than the generic code as long as the
atomic functions are properly implemented. So we can remove those arch
specific rwsem.h and stop building asm/rwsem.h to reduce maintenance
effort.Currently, only x86, alpha and ia64 have implemented architecture
specific fast paths. I don't have access to alpha and ia64 systems for
testing, but they are legacy systems that are not likely to be updated
to the latest kernel anyway.By using a rwsem microbenchmark, the total locking rates on a 4-socket
56-core 112-thread x86-64 system before and after the patch were as
follows (mixed means equal # of read and write locks):Before Patch After Patch
# of Threads wlock rlock mixed wlock rlock mixed
------------ ----- ----- ----- ----- ----- -----
1 29,201 30,143 29,458 28,615 30,172 29,201
2 6,807 13,299 1,171 7,725 15,025 1,804
4 6,504 12,755 1,520 7,127 14,286 1,345
8 6,762 13,412 764 6,826 13,652 726
16 6,693 15,408 662 6,599 15,938 626
32 6,145 15,286 496 5,549 15,487 511
64 5,812 15,495 60 5,858 15,572 60There were some run-to-run variations for the multi-thread tests. For
x86-64, using the generic C code fast path seems to be a little bit
faster than the assembly version with low lock contention. Looking at
the assembly version of the fast paths, there are assembly to/from C
code wrappers that save and restore all the callee-clobbered registers
(7 registers on x86-64). The assembly generated from the generic C
code doesn't need to do that. That may explain the slight performance
gain here.The generic asm rwsem.h can also be merged into kernel/locking/rwsem.h
with no code change as no other code other than those under
kernel/locking needs to access the internal rwsem macros and functions.Signed-off-by: Waiman Long
Signed-off-by: Peter Zijlstra (Intel)
Acked-by: Linus Torvalds
Cc: Andrew Morton
Cc: Arnd Bergmann
Cc: Borislav Petkov
Cc: Davidlohr Bueso
Cc: H. Peter Anvin
Cc: Paul E. McKenney
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: Tim Chen
Cc: Will Deacon
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Link: https://lkml.kernel.org/r/20190322143008.21313-2-longman@redhat.com
Signed-off-by: Ingo Molnar -
Only ia64-sn2 uses this as an optimization, and there it is of
questionable correctness due to the mm_users==1 test.Remove it entirely.
No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel)
Cc: Andrew Morton
Cc: Andy Lutomirski
Cc: Borislav Petkov
Cc: Dave Hansen
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Thomas Gleixner
Signed-off-by: Ingo Molnar -
Generic mmu_gather provides everything ia64 needs (range tracking).
No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel)
Cc: Andrew Morton
Cc: Andy Lutomirski
Cc: Aneesh Kumar K.V
Cc: Borislav Petkov
Cc: Dave Hansen
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Nick Piggin
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Will Deacon
Signed-off-by: Ingo Molnar -
Move the mmu_gather::page_size things into the generic code instead of
PowerPC specific bits.No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel)
Acked-by: Will Deacon
Cc: Andrew Morton
Cc: Andy Lutomirski
Cc: Aneesh Kumar K.V
Cc: Borislav Petkov
Cc: Dave Hansen
Cc: H. Peter Anvin
Cc: Linus Torvalds
Cc: Nick Piggin
Cc: Peter Zijlstra
Cc: Rik van Riel
Cc: Thomas Gleixner
Signed-off-by: Ingo Molnar
29 Mar, 2019
2 commits
-
All architectures (arm/arm64, ia64 and x86) do the same here, so unify
the code.Note: We do not need to call dump_stack_set_arch_desc() in case of
!dmi_available. Both strings, dmi_ids_string and dump_stack_arch_
desc_str are initialized zero and thus nothing would change.Signed-off-by: Robert Richter
Signed-off-by: Ard Biesheuvel
Reviewed-by: Jean Delvare
Cc: Linus Torvalds
Cc: Matt Fleming
Cc: Peter Zijlstra
Cc: Thomas Gleixner
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20190328193429.21373-5-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar -
I do not see any consistency about headers_install of
and .According to my analysis of Linux 5.1-rc1, there are 3 groups:
[1] Both and are exported
alpha, arm, hexagon, mips, powerpc, s390, sparc, x86
[2] is exported, but is not
arc, arm64, c6x, h8300, ia64, m68k, microblaze, nios2, openrisc,
parisc, sh, unicore32, xtensa[3] Neither nor is exported
csky, nds32, riscv
This does not match to the actual KVM support. At least, [2] is
half-baked.Nor do arch maintainers look like they care about this. For example,
commit 0add53713b1c ("microblaze: Add missing kvm_para.h to Kbuild")
exported to user-space in order to fix an in-kernel
build error.We have two ways to make this consistent:
[A] export both and for all
architectures, irrespective of the KVM support[B] Match the header export of and
to the KVM supportMy first attempt was [A] because the code looks cleaner, but Paolo
suggested [B].So, this commit goes with [B].
For most architectures, was moved to the kernel-space.
I changed include/uapi/linux/Kbuild so that it checks generated
asm/kvm_para.h as well as check-in ones.After this commit, there will be two groups:
[1] Both and are exported
arm, arm64, mips, powerpc, s390, x86
[2] Neither nor is exported
alpha, arc, c6x, csky, h8300, hexagon, ia64, m68k, microblaze,
nds32, nios2, openrisc, parisc, riscv, sh, sparc, unicore32, xtensaSigned-off-by: Masahiro Yamada
Acked-by: Cornelia Huck
Signed-off-by: Paolo Bonzini
21 Mar, 2019
1 commit
-
This argument is required to extend the generic ptrace API with
PTRACE_GET_SYSCALL_INFO request: syscall_get_arch() is going
to be called from ptrace_request() along with syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions with a tracee as their argument.The primary intent is that the triple (audit_arch, syscall_nr, arg1..arg6)
should describe what system call is being called and what its arguments
are.Reverts: 5e937a9ae913 ("syscall_get_arch: remove useless function arguments")
Reverts: 1002d94d3076 ("syscall.h: fix doc text for syscall_get_arch()")
Reviewed-by: Andy Lutomirski # for x86
Reviewed-by: Palmer Dabbelt
Acked-by: Paul Moore
Acked-by: Paul Burton # MIPS parts
Acked-by: Michael Ellerman (powerpc)
Acked-by: Kees Cook # seccomp parts
Acked-by: Mark Salter # for the c6x bit
Cc: Elvira Khabirova
Cc: Eugene Syromyatnikov
Cc: Oleg Nesterov
Cc: x86@kernel.org
Cc: linux-alpha@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin
Signed-off-by: Paul Moore
18 Mar, 2019
1 commit
-
Pull more Kbuild updates from Masahiro Yamada:
- add more Build-Depends to Debian source package
- prefix header search paths with $(srctree)/
- make modpost show verbose section mismatch warnings
- avoid hard-coded CROSS_COMPILE for h8300
- fix regression for Debian make-kpkg command
- add semantic patch to detect missing put_device()
- fix some warnings of 'make deb-pkg'
- optimize NOSTDINC_FLAGS evaluation
- add warnings about redundant generic-y
- clean up Makefiles and scripts
* tag 'kbuild-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: remove stale lxdialog/.gitignore
kbuild: force all architectures except um to include mandatory-y
kbuild: warn redundant generic-y
Revert "modsign: Abort modules_install when signing fails"
kbuild: Make NOSTDINC_FLAGS a simply expanded variable
kbuild: deb-pkg: avoid implicit effects
coccinelle: semantic code search for missing put_device()
kbuild: pkg: grep include/config/auto.conf instead of $KCONFIG_CONFIG
kbuild: deb-pkg: introduce is_enabled and if_enabled_echo to builddeb
kbuild: deb-pkg: add CONFIG_ prefix to kernel config options
kbuild: add workaround for Debian make-kpkg
kbuild: source include/config/auto.conf instead of ${KCONFIG_CONFIG}
unicore32: simplify linker script generation for decompressor
h8300: use cc-cross-prefix instead of hardcoding h8300-unknown-linux-
kbuild: move archive command to scripts/Makefile.lib
modpost: always show verbose warning for section mismatch
ia64: prefix header search path with $(srctree)/
libfdt: prefix header search paths with $(srctree)/
deb-pkg: generate correct build dependencies
17 Mar, 2019
3 commits
-
Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes
the common Kbuild.asm file. Factor out the duplicated include directives
to scripts/Makefile.asm-generic so that no architecture would opt out
of the mandatory-y mechanism.um is not forced to include mandatory-y since it is a very exceptional
case which does not support UAPI.Signed-off-by: Masahiro Yamada
-
The generic-y is redundant under the following condition:
- arch has its own implementation
- the same header is added to generated-y
- the same header is added to mandatory-y
If a redundant generic-y is found, the warning like follows is displayed:
scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h
I fixed up arch Kbuild files found by this.
Suggested-by: Sam Ravnborg
Signed-off-by: Masahiro Yamada -
Pull more SCSI updates from James Bottomley:
"This is the final round of mostly small fixes and performance
improvements to our initial submit.The main regression fix is the ia64 simscsi build failure which was
missed in the serial number elimination conversion"* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (24 commits)
scsi: ia64: simscsi: use request tag instead of serial_number
scsi: aacraid: Fix performance issue on logical drives
scsi: lpfc: Fix error codes in lpfc_sli4_pci_mem_setup()
scsi: libiscsi: Hold back_lock when calling iscsi_complete_task
scsi: hisi_sas: Change SERDES_CFG init value to increase reliability of HiLink
scsi: hisi_sas: Send HARD RESET to clear the previous affiliation of STP target port
scsi: hisi_sas: Set PHY linkrate when disconnected
scsi: hisi_sas: print PHY RX errors count for later revision of v3 hw
scsi: hisi_sas: Fix a timeout race of driver internal and SMP IO
scsi: hisi_sas: Change return variable type in phy_up_v3_hw()
scsi: qla2xxx: check for kstrtol() failure
scsi: lpfc: fix 32-bit format string warning
scsi: lpfc: fix unused variable warning
scsi: target: tcmu: Switch to bitmap_zalloc()
scsi: libiscsi: fall back to sendmsg for slab pages
scsi: qla2xxx: avoid printf format warning
scsi: lpfc: resolve static checker warning in lpfc_sli4_hba_unset
scsi: lpfc: Correct __lpfc_sli_issue_iocb_s4 lockdep check
scsi: ufs: hisi: fix ufs_hba_variant_ops passing
scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show
...
16 Mar, 2019
1 commit
-
Use the request tag for logging instead of the scsi command serial
number.Signed-off-by: Hannes Reinecke
Reviewed-by: Christoph Hellwig
Signed-off-by: Martin K. Petersen
[jejb: fix commit oneliner]
Signed-off-by: James Bottomley
14 Mar, 2019
1 commit
-
Currently, the Kbuild core manipulates header search paths in a crazy
way [1].To fix this mess, I want all Makefiles to add explicit $(srctree)/ to
the search paths in the srctree. Some Makefiles are already written in
that way, but not all. The goal of this work is to make the notation
consistent, and finally get rid of the gross hacks.Having whitespaces after -I does not matter since commit 48f6e3cf5bc6
("kbuild: do not drop -I without parameter").I removed some header search paths because I was able to build ia64
without them.[1]: https://patchwork.kernel.org/patch/9632347/
Signed-off-by: Masahiro Yamada
13 Mar, 2019
3 commits
-
Add panic() calls if memblock_alloc*() returns NULL.
Most of the changes are simply addition of
if(!ptr)
panic();statements after the calls to memblock_alloc*() variants.
Exceptions are create_mem_map_page_table() and ia64_log_init() that were
slightly refactored to accommodate the change.Link: http://lkml.kernel.org/r/1548057848-15136-15-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport
Cc: Catalin Marinas
Cc: Christophe Leroy
Cc: Christoph Hellwig
Cc: "David S. Miller"
Cc: Dennis Zhou
Cc: Geert Uytterhoeven
Cc: Greentime Hu
Cc: Greg Kroah-Hartman
Cc: Guan Xuetao
Cc: Guo Ren
Cc: Guo Ren [c-sky]
Cc: Heiko Carstens
Cc: Juergen Gross [Xen]
Cc: Mark Salter
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Paul Burton
Cc: Petr Mladek
Cc: Richard Weinberger
Cc: Rich Felker
Cc: Rob Herring
Cc: Rob Herring
Cc: Russell King
Cc: Stafford Horne
Cc: Tony Luck
Cc: Vineet Gupta
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
memblock_alloc() already clears the allocated memory, no point in doing
it twice.Link: http://lkml.kernel.org/r/1548057848-15136-14-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport
Acked-by: Geert Uytterhoeven [m68k]
Cc: Catalin Marinas
Cc: Christophe Leroy
Cc: Christoph Hellwig
Cc: "David S. Miller"
Cc: Dennis Zhou
Cc: Greentime Hu
Cc: Greg Kroah-Hartman
Cc: Guan Xuetao
Cc: Guo Ren
Cc: Guo Ren [c-sky]
Cc: Heiko Carstens
Cc: Juergen Gross [Xen]
Cc: Mark Salter
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Paul Burton
Cc: Petr Mladek
Cc: Richard Weinberger
Cc: Rich Felker
Cc: Rob Herring
Cc: Rob Herring
Cc: Russell King
Cc: Stafford Horne
Cc: Tony Luck
Cc: Vineet Gupta
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The last parameter of memblock_alloc_from() is the lower limit for the
memory allocation. When it is 0, the call is equivalent to
memblock_alloc().Link: http://lkml.kernel.org/r/1548057848-15136-13-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport
Acked-by: Paul Burton # MIPS part
Cc: Catalin Marinas
Cc: Christophe Leroy
Cc: Christoph Hellwig
Cc: "David S. Miller"
Cc: Dennis Zhou
Cc: Geert Uytterhoeven
Cc: Greentime Hu
Cc: Greg Kroah-Hartman
Cc: Guan Xuetao
Cc: Guo Ren
Cc: Guo Ren [c-sky]
Cc: Heiko Carstens
Cc: Juergen Gross [Xen]
Cc: Mark Salter
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Petr Mladek
Cc: Richard Weinberger
Cc: Rich Felker
Cc: Rob Herring
Cc: Rob Herring
Cc: Russell King
Cc: Stafford Horne
Cc: Tony Luck
Cc: Vineet Gupta
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Mar, 2019
1 commit
-
Merge misc updates from Andrew Morton:
- a few misc things
- ocfs2 updates
- most of MM
* emailed patches from Andrew Morton : (159 commits)
tools/testing/selftests/proc/proc-self-syscall.c: remove duplicate include
proc: more robust bulk read test
proc: test /proc/*/maps, smaps, smaps_rollup, statm
proc: use seq_puts() everywhere
proc: read kernel cpu stat pointer once
proc: remove unused argument in proc_pid_lookup()
fs/proc/thread_self.c: code cleanup for proc_setup_thread_self()
fs/proc/self.c: code cleanup for proc_setup_self()
proc: return exit code 4 for skipped tests
mm,mremap: bail out earlier in mremap_to under map pressure
mm/sparse: fix a bad comparison
mm/memory.c: do_fault: avoid usage of stale vm_area_struct
writeback: fix inode cgroup switching comment
mm/huge_memory.c: fix "orig_pud" set but not used
mm/hotplug: fix an imbalance with DEBUG_PAGEALLOC
mm/memcontrol.c: fix bad line in comment
mm/cma.c: cma_declare_contiguous: correct err handling
mm/page_ext.c: fix an imbalance with kmemleak
mm/compaction: pass pgdat to too_many_isolated() instead of zone
mm: remove zone_lru_lock() function, access ->lru_lock directly
...
06 Mar, 2019
2 commits
-
In the old days, remap_pfn_range() required pages to be marked as
PG_reserved, so they would e.g. never get swapped out. This was
required for special mappings. Nowadays, this is fully handled via the
VMA (VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP inside
remap_pfn_range() to be precise). PG_reserved is no longer required but
only a relic from the past.So only architecture specific MM handling might require it (e.g. to
detect them as MMIO pages). As there are no architecture specific
checks for PageReserved() apart from MCA handling in ia64code, this can
go. Use simple vzalloc()/vfree() instead.Note that before calling vzalloc(), size has already been aligned to
PAGE_SIZE, no need to align again.Link: http://lkml.kernel.org/r/20190114125903.24845-9-david@redhat.com
Signed-off-by: David Hildenbrand
Cc: Tony Luck
Cc: Fenghua Yu
Cc: Oleg Nesterov
Cc: David Hildenbrand
Cc: David Howells
Cc: Mike Rapoport
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Patch series "Replace all open encodings for NUMA_NO_NODE", v3.
All these places for replacement were found by running the following
grep patterns on the entire kernel code. Please let me know if this
might have missed some instances. This might also have replaced some
false positives. I will appreciate suggestions, inputs and review.1. git grep "nid == -1"
2. git grep "node == -1"
3. git grep "nid = -1"
4. git grep "node = -1"This patch (of 2):
At present there are multiple places where invalid node number is
encoded as -1. Even though implicitly understood it is always better to
have macros in there. Replace these open encodings for an invalid node
number with the global macro NUMA_NO_NODE. This helps remove NUMA
related assumptions like 'invalid node' from various places redirecting
them to a common definition.Link: http://lkml.kernel.org/r/1545127933-10711-2-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual
Reviewed-by: David Hildenbrand
Acked-by: Jeff Kirsher [ixgbe]
Acked-by: Jens Axboe [mtip32xx]
Acked-by: Vinod Koul [dmaengine.c]
Acked-by: Michael Ellerman [powerpc]
Acked-by: Doug Ledford [drivers/infiniband]
Cc: Joseph Qi
Cc: Hans Verkuil
Cc: Stephen Rothwell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
