16 May, 2018
4 commits
-
Implement shared buffer handling according to the
para-virtualized sound device protocol at xen/interface/io/sndif.h:
- manage buffer memory
- handle granted references
- handle page directories[ Fixed missing linux/kernel.h inclusion -- tiwai ]
Signed-off-by: Oleksandr Andrushchenko
Signed-off-by: Takashi Iwai -
Handle Xen event channels:
- create for all configured streams and publish
corresponding ring references and event channels in Xen store,
so backend can connect
- implement event channels interrupt handlers
- create and destroy event channels with respect to Xen bus stateSigned-off-by: Oleksandr Andrushchenko
Signed-off-by: Takashi Iwai -
Read configuration values from Xen store according
to xen/interface/io/sndif.h protocol:
- introduce configuration structures for different
components, e.g. sound card, device, stream
- read PCM HW parameters, e.g rate, format etc.
- detect stream type (capture/playback)
- read device and card parametersSigned-off-by: Oleksandr Andrushchenko
Signed-off-by: Takashi Iwai -
Introduce skeleton of the para-virtualized Xen sound
frontend driver.Initial handling for Xen bus states: implement
Xen bus state machine for the frontend driver according to
the state diagram and recovery flow from sound para-virtualized
protocol: xen/interface/io/sndif.h.Signed-off-by: Oleksandr Andrushchenko
Reviewed-by: Juergen Gross
Signed-off-by: Takashi Iwai
23 Apr, 2018
12 commits
-
Pull drm fixes from Dave Airlie:
"Exynos, i915, vc4, amdgpu fixes.i915:
- an oops fix
- two race fixes
- some gvt fixesamdgpu:
- dark screen fix
- clk/voltage fix
- vega12 smu fixvc4:
- memory leak fixexynos just drops some code"
* tag 'drm-fixes-for-v4.17-rc2' of git://people.freedesktop.org/~airlied/linux: (23 commits)
drm/amd/powerplay: header file interface to SMU update
drm/amd/pp: Fix bug voltage can't be OD separately on VI
drm/amd/display: Don't program bypass on linear regamma LUT
drm/i915: Fix LSPCON TMDS output buffer enabling from low-power state
drm/i915/audio: Fix audio detection issue on GLK
drm/i915: Call i915_perf_fini() on init_hw error unwind
drm/i915/bios: filter out invalid DDC pins from VBT child devices
drm/i915/pmu: Inspect runtime PM state more carefully while estimating RC6
drm/i915: Do no use kfree() to free a kmem_cache_alloc() return value
drm/exynos: exynos_drm_fb -> drm_framebuffer
drm/exynos: Move dma_addr out of exynos_drm_fb
drm/exynos: Move GEM BOs to drm_framebuffer
drm: Fix HDCP downstream dev count read
drm/vc4: Fix memory leak during BO teardown
drm/i915/execlists: Clear user-active flag on preemption completion
drm/i915/gvt: Add drm_format_mod update
drm/i915/gvt: Disable primary/sprite/cursor plane at virtual display initialization
drm/i915/gvt: Delete redundant error message in fb_decode.c
drm/i915/gvt: Cancel dma map when resetting ggtt entries
drm/i915/gvt: Missed to cancel dma map for ggtt entries
... -
- Fix a dark screen issue in DC
- Fix clk/voltage dependency tracking for wattman
- Update SMU interface for vega12* 'drm-next-4.17' of git://people.freedesktop.org/~agd5f/linux:
drm/amd/powerplay: header file interface to SMU update
drm/amd/pp: Fix bug voltage can't be OD separately on VI
drm/amd/display: Don't program bypass on linear regamma LUT -
…/kernel/git/daeinki/drm-exynos into drm-next
Remove Exynos specific framebuffer structure and
relevant functions.
- it removes exynos_drm_fb structure which is a wrapper of
drm_framebuffer and unnecessary two exynos specific callback
functions, exynos_drm_destory() and exynos_drm_fb_create_handle()
because we can reuse existing drm common callback ones instead.* tag 'exynos-drm-fixes-for-v4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: exynos_drm_fb -> drm_framebuffer
drm/exynos: Move dma_addr out of exynos_drm_fb
drm/exynos: Move GEM BOs to drm_framebuffer
drm/amdkfd: Deallocate SDMA queues correctly
drm/amdkfd: Fix scratch memory with HWS enabled -
…/drm-intel into drm-next
- Fix for FDO #105549: Avoid OOPS on bad VBT (Jani)
- Fix rare pre-emption race (Chris)
- Fix RC6 race against PM transitions (Tvrtko)* tag 'drm-intel-next-fixes-2018-04-19' of git://anongit.freedesktop.org/drm/drm-intel:
drm/i915/audio: Fix audio detection issue on GLK
drm/i915: Call i915_perf_fini() on init_hw error unwind
drm/i915/bios: filter out invalid DDC pins from VBT child devices
drm/i915/pmu: Inspect runtime PM state more carefully while estimating RC6
drm/i915: Do no use kfree() to free a kmem_cache_alloc() return value
drm/i915/execlists: Clear user-active flag on preemption completion
drm/i915/gvt: Add drm_format_mod update
drm/i915/gvt: Disable primary/sprite/cursor plane at virtual display initialization
drm/i915/gvt: Delete redundant error message in fb_decode.c
drm/i915/gvt: Cancel dma map when resetting ggtt entries
drm/i915/gvt: Missed to cancel dma map for ggtt entries
drm/i915/gvt: Make MI_USER_INTERRUPT nop in cmd parser
drm/i915/gvt: Mark expected switch fall-through in handle_g2v_notification
drm/i915/gvt: throw error on unhandled vfio ioctls -
drm-misc-fixes:
stable: vc4: Fix memory leak during BO teardown (Daniel)
dp: Add i2c retry for LSPCON adapters (Imre)
hdcp: Fix device count mask (Ramalingam)Cc: Daniel J Blueman
Cc: Ramalingam C* tag 'drm-misc-fixes-2018-04-18-1' of git://anongit.freedesktop.org/drm/drm-misc:
drm/i915: Fix LSPCON TMDS output buffer enabling from low-power state
drm: Fix HDCP downstream dev count read
drm/vc4: Fix memory leak during BO teardown -
Pull cifs fixes from Steve French:
"Various SMB3/CIFS fixes.There are three more security related fixes in progress that are not
included in this set but they are still being tested and reviewed, so
sending this unrelated set of smaller fixes now"* tag '4.17-rc1-SMB3-CIFS' of git://git.samba.org/sfrench/cifs-2.6:
CIFS: fix typo in cifs_dbg
cifs: do not allow creating sockets except with SMB1 posix exensions
cifs: smbd: Dump SMB packet when configured
cifs: smbd: Check for iov length on sending the last iov
fs: cifs: Adding new return type vm_fault_t
cifs: smb2ops: Fix NULL check in smb2_query_symlink -
Pull btrfs fixes from David Sterba:
"This contains a few fixups to the qgroup patches that were merged this
dev cycle, unaligned access fix, blockgroup removal corner case fix
and a small debugging output tweak"* tag 'for-4.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: print-tree: debugging output enhancement
btrfs: Fix race condition between delayed refs and blockgroup removal
btrfs: fix unaligned access in readdir
btrfs: Fix wrong btrfs_delalloc_release_extents parameter
btrfs: delayed-inode: Remove wrong qgroup meta reservation calls
btrfs: qgroup: Use independent and accurate per inode qgroup rsv
btrfs: qgroup: Commit transaction in advance to reduce early EDQUOT -
Pull x86 fixes from Thomas Gleixner:
"A small set of fixes for x86:- Prevent X2APIC ID 0xFFFFFFFF from being treated as valid, which
causes the possible CPU count to be wrong.- Prevent 32bit truncation in calc_hpet_ref() which causes the TSC
calibration to fail- Fix the page table setup for temporary text mappings in the resume
code which causes resume failures- Make the page table dump code handle HIGHPTE correctly instead of
oopsing- Support for topologies where NUMA nodes share an LLC to prevent a
invalid topology warning and further malfunction on such systems.- Remove the now unused pci-nommu code
- Remove stale function declarations"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/power/64: Fix page-table setup for temporary text mapping
x86/mm: Prevent kernel Oops in PTDUMP code with HIGHPTE=y
x86,sched: Allow topologies where NUMA nodes share an LLC
x86/processor: Remove two unused function declarations
x86/acpi: Prevent X2APIC id 0xffffffff from being accounted
x86/tsc: Prevent 32bit truncation in calc_hpet_ref()
x86: Remove pci-nommu.c -
Pull timer fixes from Thomas Gleixner:
"A small set of timer fixes:- Evaluate the -ETIME condition correctly in the imx tpm driver
- Fix the evaluation order of a condition in posix cpu timers
- Use pr_cont() in the clockevents code to prevent ugly message
splitting- Remove __current_kernel_time() which is now unused to prevent that
new users show up.- Remove a stale forward declaration"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
clocksource/imx-tpm: Correct -ETIME return condition check
posix-cpu-timers: Ensure set_process_cpu_timer is always evaluated
timekeeping: Remove __current_kernel_time()
timers: Remove stale struct tvec_base forward declaration
clockevents: Fix kernel messages split across multiple lines -
Pull perf fixes from Thomas Gleixner:
"A larger set of updates for perf.Kernel:
- Handle the SBOX uncore monitoring correctly on Broadwell CPUs which
do not have SBOX.- Store context switch out type in PERF_RECORD_SWITCH[_CPU_WIDE]. The
percentage of preempting and non-preempting context switches help
understanding the nature of workloads (CPU or IO bound) that are
running on a machine. This adds the kernel facility and userspace
changes needed to show this information in 'perf script' and 'perf
report -D' (Alexey Budankov)- Remove a WARN_ON() in the trace/kprobes code which is pointless
because the return error code is already telling the caller what's
wrong.- Revert a fugly workaround for clang BPF targets.
- Fix sample_max_stack maximum check and do not proceed when an error
has been detect, return them to avoid misidentifying errors (Jiri
Olsa)- Add SPDX idenitifiers and get rid of GPL boilderplate.
Tools:
- Synchronize kernel ABI headers, v4.17-rc1 (Ingo Molnar)
- Support MAP_FIXED_NOREPLACE, noticed when updating the
tools/include/ copies (Arnaldo Carvalho de Melo)- Add '\n' at the end of parse-options error messages (Ravi Bangoria)
- Add s390 support for detailed/verbose PMU event description (Thomas
Richter)- perf annotate fixes and improvements:
* Allow showing offsets in more than just jump targets, use the
new 'O' hotkey in the TUI, config ~/.perfconfig
annotate.offset_level for it and for --stdio2 (Arnaldo Carvalho
de Melo)* Use the resolved variable names from objdump disassembled lines
to make them more compact, just like was already done for some
instructions, like "mov", this eventually will be done more
generally, but lets now add some more to the existing mechanism
(Arnaldo Carvalho de Melo)- perf record fixes:
* Change warning for missing topology sysfs entry to debug, as not
all architectures have those files, s390 being one of those
(Thomas Richter)* Remove old error messages about things that unlikely to be the
root cause in modern systems (Andi Kleen)- perf sched fixes:
* Fix -g/--call-graph documentation (Takuya Yamamoto)
- perf stat:
* Enable 1ms interval for printing event counters values in
(Alexey Budankov)- perf test fixes:
* Run dwarf unwind on arm32 (Kim Phillips)
* Remove unused ptrace.h include from LLVM test, sidesteping older
clang's lack of support for some asm constructs (Arnaldo
Carvalho de Melo)* Fixup BPF test using epoll_pwait syscall function probe, to cope
with the syscall routines renames performed in this development
cycle (Arnaldo Carvalho de Melo)- perf version fixes:
* Do not print info about HAVE_LIBAUDIT_SUPPORT in 'perf version
--build-options' when HAVE_SYSCALL_TABLE_SUPPORT is true, as
libaudit won't be used in that case, print info about
syscall_table support instead (Jin Yao)- Build system fixes:
* Use HAVE_..._SUPPORT used consistently (Jin Yao)
* Restore READ_ONCE() C++ compatibility in tools/include (Mark
Rutland)* Give hints about package names needed to build jvmti (Arnaldo
Carvalho de Melo)"* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits)
perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs
perf/x86/intel/uncore: Revert "Remove SBOX support for Broadwell server"
coresight: Move to SPDX identifier
perf test BPF: Fixup BPF test using epoll_pwait syscall function probe
perf tests mmap: Show which tracepoint is failing
perf tools: Add '\n' at the end of parse-options error messages
perf record: Remove suggestion to enable APIC
perf record: Remove misleading error suggestion
perf hists browser: Clarify top/report browser help
perf mem: Allow all record/report options
perf trace: Support MAP_FIXED_NOREPLACE
perf: Remove superfluous allocation error check
perf: Fix sample_max_stack maximum check
perf: Return proper values for user stack errors
perf list: Add s390 support for detailed/verbose PMU event description
perf script: Extend misc field decoding with switch out event type
perf report: Extend raw dump (-D) out with switch out event type
perf/core: Store context switch out type in PERF_RECORD_SWITCH[_CPU_WIDE]
tools/headers: Synchronize kernel ABI headers, v4.17-rc1
trace_kprobe: Remove warning message "Could not insert probe at..."
... -
Pull objtool fix from Thomas Gleixner:
"A single fix for objtool so it uses the host C and LD flags and not
the target ones"* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Support HOSTCFLAGS and HOSTLDFLAGS
22 Apr, 2018
6 commits
-
Pull /dev/random fixes from Ted Ts'o:
"Fix some bugs in the /dev/random driver which causes getrandom(2) to
unblock earlier than designed.Thanks to Jann Horn from Google's Project Zero for pointing this out
to me"* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
random: add new ioctl RNDRESEEDCRNG
random: crng_reseed() should lock the crng instance that it is modifying
random: set up the NUMA crng instances after the CRNG is fully initialized
random: use a different mixing algorithm for add_device_randomness()
random: fix crng_ready() test -
Pull libnvdimm fixes from Dan Williams:
"A regression fix, new unit test infrastructure and a build fix:- Regression fix addressing support for the new NVDIMM label storage
area access commands (_LSI, _LSR, and _LSW).The Intel specific version of these commands communicated the
"Device Locked" status on the label-storage-information command.However, these new commands (standardized in ACPI 6.2) communicate
the "Device Locked" status on the label-storage-read command, and
the driver was missing the indication.Reading from locked persistent memory is similar to reading
unmapped PCI memory space, returns all 1's.- Unit test infrastructure is added to regression test the "Device
Locked" detection failure.- A build fix is included to allow the "of_pmem" driver to be built
as a module and translate an Open Firmware described device to its
local numa node"* 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
MAINTAINERS: Add backup maintainers for libnvdimm and DAX
device-dax: allow MAP_SYNC to succeed
Revert "libnvdimm, of_pmem: workaround OF_NUMA=n build error"
libnvdimm, of_pmem: use dev_to_node() instead of of_node_to_nid()
tools/testing/nvdimm: enable labels for nfit_test.1 dimms
tools/testing/nvdimm: fix missing newline in nfit_test_dimm 'handle' attribute
tools/testing/nvdimm: support nfit_test_dimm attributes under nfit_test.1
tools/testing/nvdimm: allow custom error code injection
libnvdimm, dimm: handle EACCES failures from label reads -
Pull sound fixes from Takashi Iwai:
"A few small fixes:- a fix for the NULL-dereference in rawmidi compat ioctls, triggered
by fuzzer- HD-audio Realtek codec quirks, a VIA controller fixup
- a long-standing bug fix in LINE6 MIDI"
* tag 'sound-4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: rawmidi: Fix missing input substream checks in compat ioctls
ALSA: hda/realtek - adjust the location of one mic
ALSA: hda/realtek - set PINCFG_HEADSET_MIC to parse_flags
ALSA: hda - New VIA controller suppor no-snoop path
ALSA: line6: Use correct endpoint type for midi output -
Pull watchdog fixes from Wim Van Sebroeck:
- fall-through fixes
- MAINTAINER change for hpwdt
- renesas-wdt: Add support for WDIOF_CARDRESET
- aspeed: set bootstatus during probe
* tag 'linux-watchdog-4.17-rc2' of git://www.linux-watchdog.org/linux-watchdog:
aspeed: watchdog: Set bootstatus during probe
watchdog: renesas-wdt: Add support for WDIOF_CARDRESET
watchdog: wafer5823wdt: Mark expected switch fall-through
watchdog: w83977f_wdt: Mark expected switch fall-through
watchdog: sch311x_wdt: Mark expected switch fall-through
watchdog: hpwdt: change maintainer. -
…l/git/shuah/linux-kselftest
Pull Kselftest fix from Shuah Khan:
"A fix from Michael Ellerman to not run dnotify_test by default to
prevent Kselftest running forever"* tag 'linux-kselftest-4.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
selftests/filesystems: Don't run dnotify_test by default -
Pull arm64 fixes from Catalin Marinas:
- kasan: avoid pfn_to_nid() before the page array is initialised
- Fix typo causing the "upgrade" of known signals to SIGKILL
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: signal: don't force known signals to SIGKILL
arm64: kasan: avoid pfn_to_nid() before page array is initialized
21 Apr, 2018
18 commits
-
Merge misc fixes from Andrew Morton:
- "fork: unconditionally clear stack on fork" is a non-bugfix which got
lost during the merge window - performance concerns appear to have
been adequately addressed.- and a bunch of fixes
* emailed patches from Andrew Morton :
mm/filemap.c: fix NULL pointer in page_cache_tree_insert()
mm: memcg: add __GFP_NOWARN in __memcg_schedule_kmem_cache_create()
fs, elf: don't complain MAP_FIXED_NOREPLACE unless -EEXIST error
kexec_file: do not add extra alignment to efi memmap
proc: fix /proc/loadavg regression
proc: revalidate kernel thread inodes to root:root
autofs: mount point create should honour passed in mode
MAINTAINERS: add personal addresses for Sascha and Uwe
kasan: add no_sanitize attribute for clang builds
rapidio: fix rio_dma_transfer error handling
mm: enable thp migration for shmem thp
writeback: safer lock nesting
mm, pagemap: fix swap offset value for PMD migration entry
mm: fix do_pages_move status handling
fork: unconditionally clear stack on fork -
…linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent fixes and improvements from Arnaldo Carvalho de Melo:
- Store context switch out type in PERF_RECORD_SWITCH[_CPU_WIDE].
The percentage of preempting and non-preempting context switches help
understanding the nature of workloads (CPU or IO bound) that are running
on a machine. This adds the kernel facility and userspace changes needed
to show this information in 'perf script' and 'perf report -D' (Alexey Budankov)- Remove old error messages about things that unlikely to be the root cause
in modern systems (Andi Kleen)- Synchronize kernel ABI headers, v4.17-rc1 (Ingo Molnar)
- Support MAP_FIXED_NOREPLACE, noticed when updating the tools/include/
copies (Arnaldo Carvalho de Melo)- Fixup BPF test using epoll_pwait syscall function probe, to cope with
the syscall routines renames performed in this development cycle (Arnaldo Carvalho de Melo)- Fix sample_max_stack maximum check and do not proceed when an error
has been detect, return them to avoid misidentifying errors (Jiri Olsa)- Add '\n' at the end of parse-options error messages (Ravi Bangoria)
- Add s390 support for detailed/verbose PMU event description (Thomas Richter)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org> -
f2fs specifies the __GFP_ZERO flag for allocating some of its pages.
Unfortunately, the page cache also uses the mapping's GFP flags for
allocating radix tree nodes. It always masked off the __GFP_HIGHMEM
flag, and masks off __GFP_ZERO in some paths, but not all. That causes
radix tree nodes to be allocated with a NULL list_head, which causes
backtraces like:__list_del_entry+0x30/0xd0
list_lru_del+0xac/0x1ac
page_cache_tree_insert+0xd8/0x110The __GFP_DMA and __GFP_DMA32 flags would also be able to sneak through
if they are ever used. Fix them all by using GFP_RECLAIM_MASK at the
innermost location, and remove it from earlier in the callchain.Link: http://lkml.kernel.org/r/20180411060320.14458-2-willy@infradead.org
Fixes: 449dd6984d0e ("mm: keep page cache radix tree nodes in check")
Signed-off-by: Matthew Wilcox
Reported-by: Chris Fries
Debugged-by: Minchan Kim
Acked-by: Johannes Weiner
Acked-by: Michal Hocko
Reviewed-by: Jan Kara
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If there is heavy memory pressure, page allocation with __GFP_NOWAIT
fails easily although it's order-0 request. I got below warning 9 times
for normal boot.: page allocation failure: order:0, mode:0x2200000(GFP_NOWAIT|__GFP_NOTRACK)
.. snip ..
Call trace:
dump_backtrace+0x0/0x4
dump_stack+0xa4/0xc0
warn_alloc+0xd4/0x15c
__alloc_pages_nodemask+0xf88/0x10fc
alloc_slab_page+0x40/0x18c
new_slab+0x2b8/0x2e0
___slab_alloc+0x25c/0x464
__kmalloc+0x394/0x498
memcg_kmem_get_cache+0x114/0x2b8
kmem_cache_alloc+0x98/0x3e8
mmap_region+0x3bc/0x8c0
do_mmap+0x40c/0x43c
vm_mmap_pgoff+0x15c/0x1e4
sys_mmap+0xb0/0xc8
el0_svc_naked+0x24/0x28
Mem-Info:
active_anon:17124 inactive_anon:193 isolated_anon:0
active_file:7898 inactive_file:712955 isolated_file:55
unevictable:0 dirty:27 writeback:18 unstable:0
slab_reclaimable:12250 slab_unreclaimable:23334
mapped:19310 shmem:212 pagetables:816 bounce:0
free:36561 free_pcp:1205 free_cma:35615
Node 0 active_anon:68496kB inactive_anon:772kB active_file:31592kB inactive_file:2851820kB unevictable:0kB isolated(anon):0kB isolated(file):220kB mapped:77240kB dirty:108kB writeback:72kB shmem:848kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no
DMA free:142188kB min:3056kB low:3820kB high:4584kB active_anon:10052kB inactive_anon:12kB active_file:312kB inactive_file:1412620kB unevictable:0kB writepending:0kB present:1781412kB managed:1604728kB mlocked:0kB slab_reclaimable:3592kB slab_unreclaimable:876kB kernel_stack:400kB pagetables:52kB bounce:0kB free_pcp:1436kB local_pcp:124kB free_cma:142492kB
lowmem_reserve[]: 0 1842 1842
Normal free:4056kB min:4172kB low:5212kB high:6252kB active_anon:58376kB inactive_anon:760kB active_file:31348kB inactive_file:1439040kB unevictable:0kB writepending:180kB present:2000636kB managed:1923688kB mlocked:0kB slab_reclaimable:45408kB slab_unreclaimable:92460kB kernel_stack:9680kB pagetables:3212kB bounce:0kB free_pcp:3392kB local_pcp:688kB free_cma:0kB
lowmem_reserve[]: 0 0 0
DMA: 0*4kB 0*8kB 1*16kB (C) 0*32kB 0*64kB 0*128kB 1*256kB (C) 1*512kB (C) 0*1024kB 1*2048kB (C) 34*4096kB (C) = 142096kB
Normal: 228*4kB (UMEH) 172*8kB (UMH) 23*16kB (UH) 24*32kB (H) 5*64kB (H) 1*128kB (H) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 3872kB
721350 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap = 0kB
Total swap = 0kB
945512 pages RAM
0 pages HighMem/MovableOnly
63408 pages reserved
51200 pages cma reserved__memcg_schedule_kmem_cache_create() tries to create a shadow slab cache
and the worker allocation failure is not really critical because we will
retry on the next kmem charge. We might miss some charges but that
shouldn't be critical. The excessive allocation failure report is not
very helpful.[mhocko@kernel.org: changelog update]
Link: http://lkml.kernel.org/r/20180418022912.248417-1-minchan@kernel.org
Signed-off-by: Minchan Kim
Acked-by: Johannes Weiner
Reviewed-by: Andrew Morton
Cc: Michal Hocko
Cc: Vladimir Davydov
Cc: Minchan Kim
Cc: Matthew Wilcox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 4ed28639519c ("fs, elf: drop MAP_FIXED usage from elf_map") is
printing spurious messages under memory pressure due to map_addr == -ENOMEM.9794 (a.out): Uhuuh, elf segment at 00007f2e34738000(fffffffffffffff4) requested but the memory is mapped already
14104 (a.out): Uhuuh, elf segment at 00007f34fd76c000(fffffffffffffff4) requested but the memory is mapped already
16843 (a.out): Uhuuh, elf segment at 00007f930ecc7000(fffffffffffffff4) requested but the memory is mapped alreadyComplain only if -EEXIST, and use %px for printing the address.
Link: http://lkml.kernel.org/r/201804182307.FAC17665.SFMOFJVFtHOLOQ@I-love.SAKURA.ne.jp
Fixes: 4ed28639519c7bad ("fs, elf: drop MAP_FIXED usage from elf_map") is
Signed-off-by: Tetsuo Handa
Acked-by: Michal Hocko
Cc: Andrei Vagin
Cc: Khalid Aziz
Cc: Michael Ellerman
Cc: Kees Cook
Cc: Abdul Haleem
Cc: Joel Stanley
Cc: Anshuman Khandual
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Chun-Yi reported a kernel warning message below:
WARNING: CPU: 0 PID: 0 at ../mm/early_ioremap.c:182 early_iounmap+0x4f/0x12c()
early_iounmap(ffffffffff200180, 00000118) [0] size not consistent 00000120The problem is x86 kexec_file_load adds extra alignment to the efi
memmap: in bzImage64_load():efi_map_sz = efi_get_runtime_map_size();
efi_map_sz = ALIGN(efi_map_sz, 16);And __efi_memmap_init maps with the size including the alignment bytes
but efi_memmap_unmap use nr_maps * desc_size which does not include the
extra bytes.The alignment in kexec code is only needed for the kexec buffer internal
use Actually kexec should pass exact size of the efi memmap to 2nd
kernel.Link: http://lkml.kernel.org/r/20180417083600.GA1972@dhcp-128-65.nay.redhat.com
Signed-off-by: Dave Young
Reported-by: joeyli
Tested-by: Randy Wright
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 95846ecf9dac ("pid: replace pid bitmap implementation with IDR
API") changed last field of /proc/loadavg (last pid allocated) to be off
by one:# unshare -p -f --mount-proc cat /proc/loadavg
0.00 0.00 0.00 1/60 2
Cc: "Eric W. Biederman"
Cc: Gargi Sharma
Cc: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
task_dump_owner() has the following code:
mm = task->mm;
if (mm) {
if (get_dumpable(mm) != SUID_DUMP_USER) {
uid = ...
}
}Check for ->mm is buggy -- kernel thread might be borrowing mm
and inode will go to some random uid:gid pair.Link: http://lkml.kernel.org/r/20180412220109.GA20978@avx2
Signed-off-by: Alexey Dobriyan
Cc: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The autofs file system mkdir inode operation blindly sets the created
directory mode to S_IFDIR | 0555, ingoring the passed in mode, which can
cause selinux dac_override denials.But the function also checks if the caller is the daemon (as no-one else
should be able to do anything here) so there's no point in not honouring
the passed in mode, allowing the daemon to set appropriate mode when
required.Link: http://lkml.kernel.org/r/152361593601.8051.14014139124905996173.stgit@pluto.themaw.net
Signed-off-by: Ian Kent
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The idea behind using kernel@pengutronix.de (i.e. the mail alias for the
kernel people at Pengutronix) as email address was to have a backup when
a given developer is on vacation or run over by a bus. Make this more
explicit by adding the alias as reviewer and use the personal address
for Sascha and me.Link: http://lkml.kernel.org/r/20180413083312.11213-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König
Acked-by: Sascha Hauer
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
KASAN uses the __no_sanitize_address macro to disable instrumentation of
particular functions. Right now it's defined only for GCC build, which
causes false positives when clang is used.This patch adds a definition for clang.
Note, that clang's revision 329612 or higher is required.
[andreyknvl@google.com: remove redundant #ifdef CONFIG_KASAN check]
Link: http://lkml.kernel.org/r/c79aa31a2a2790f6131ed607c58b0dd45dd62a6c.1523967959.git.andreyknvl@google.com
Link: http://lkml.kernel.org/r/4ad725cc903f8534f8c8a60f0daade5e3d674f8d.1523554166.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov
Acked-by: Andrey Ryabinin
Cc: Alexander Potapenko
Cc: Dmitry Vyukov
Cc: David Rientjes
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: David Woodhouse
Cc: Andrey Konovalov
Cc: Will Deacon
Cc: Greg Kroah-Hartman
Cc: Paul Lawrence
Cc: Sandipan Das
Cc: Kees Cook
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Some of the mport_dma_req structure members were initialized late
inside the do_dma_request() function, just before submitting the
request to the dma engine. But we have some error branches before
that. In case of such an error, the code would return on the error
path and trigger the calling of dma_req_free() with a req structure
which is not completely initialized. This causes a NULL pointer
dereference in dma_req_free().This patch fixes these error branches by making sure that all
necessary mport_dma_req structure members are initialized in
rio_dma_transfer() immediately after the request structure gets
allocated.Link: http://lkml.kernel.org/r/20180412150605.GA31409@nokia.com
Fixes: bbd876adb8c72 ("rapidio: use a reference count for struct mport_dma_req")
Signed-off-by: Ioan Nicu
Tested-by: Alexander Sverdlin
Acked-by: Alexandre Bounine
Cc: Barry Wood
Cc: Matt Porter
Cc: Christophe JAILLET
Cc: Logan Gunthorpe
Cc: Chris Wilson
Cc: Tvrtko Ursulin
Cc: Frank Kunz
Cc: [4.6+]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
My testing for the latest kernel supporting thp migration showed an
infinite loop in offlining the memory block that is filled with shmem
thps. We can get out of the loop with a signal, but kernel should return
with failure in this case.What happens in the loop is that scan_movable_pages() repeats returning
the same pfn without any progress. That's because page migration always
fails for shmem thps.In memory offline code, memory blocks containing unmovable pages should be
prevented from being offline targets by has_unmovable_pages() inside
start_isolate_page_range(). So it's possible to change migratability for
non-anonymous thps to avoid the issue, but it introduces more complex and
thp-specific handling in migration code, so it might not good.So this patch is suggesting to fix the issue by enabling thp migration for
shmem thp. Both of anon/shmem thp are migratable so we don't need
precheck about the type of thps.Link: http://lkml.kernel.org/r/20180406030706.GA2434@hori1.linux.bs1.fc.nec.co.jp
Fixes: commit 72b39cfc4d75 ("mm, memory_hotplug: do not fail offlining too early")
Signed-off-by: Naoya Horiguchi
Acked-by: Kirill A. Shutemov
Cc: Zi Yan
Cc: Vlastimil Babka
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
lock_page_memcg()/unlock_page_memcg() use spin_lock_irqsave/restore() if
the page's memcg is undergoing move accounting, which occurs when a
process leaves its memcg for a new one that has
memory.move_charge_at_immigrate set.unlocked_inode_to_wb_begin,end() use spin_lock_irq/spin_unlock_irq() if
the given inode is switching writeback domains. Switches occur when
enough writes are issued from a new domain.This existing pattern is thus suspicious:
lock_page_memcg(page);
unlocked_inode_to_wb_begin(inode, &locked);
...
unlocked_inode_to_wb_end(inode, locked);
unlock_page_memcg(page);If both inode switch and process memcg migration are both in-flight then
unlocked_inode_to_wb_end() will unconditionally enable interrupts while
still holding the lock_page_memcg() irq spinlock. This suggests the
possibility of deadlock if an interrupt occurs before unlock_page_memcg().truncate
__cancel_dirty_page
lock_page_memcg
unlocked_inode_to_wb_begin
unlocked_inode_to_wb_end
end_page_writeback
test_clear_page_writeback
lock_page_memcg
unlock_page_memcgDue to configuration limitations this deadlock is not currently possible
because we don't mix cgroup writeback (a cgroupv2 feature) and
memory.move_charge_at_immigrate (a cgroupv1 feature).If the kernel is hacked to always claim inode switching and memcg
moving_account, then this script triggers lockup in less than a minute:cd /mnt/cgroup/memory
mkdir a b
echo 1 > a/memory.move_charge_at_immigrate
echo 1 > b/memory.move_charge_at_immigrate
(
echo $BASHPID > a/cgroup.procs
while true; do
dd if=/dev/zero of=/mnt/big bs=1M count=256
done
) &
while true; do
sync
done &
sleep 1h &
SLEEP=$!
while true; do
echo $SLEEP > a/cgroup.procs
echo $SLEEP > b/cgroup.procs
doneThe deadlock does not seem possible, so it's debatable if there's any
reason to modify the kernel. I suggest we should to prevent future
surprises. And Wang Long said "this deadlock occurs three times in our
environment", so there's more reason to apply this, even to stable.
Stable 4.4 has minor conflicts applying this patch. For a clean 4.4 patch
see "[PATCH for-4.4] writeback: safer lock nesting"
https://lkml.org/lkml/2018/4/11/146Wang Long said "this deadlock occurs three times in our environment"
[gthelen@google.com: v4]
Link: http://lkml.kernel.org/r/20180411084653.254724-1-gthelen@google.com
[akpm@linux-foundation.org: comment tweaks, struct initialization simplification]
Change-Id: Ibb773e8045852978f6207074491d262f1b3fb613
Link: http://lkml.kernel.org/r/20180410005908.167976-1-gthelen@google.com
Fixes: 682aa8e1a6a1 ("writeback: implement unlocked_inode_to_wb transaction and use it for stat updates")
Signed-off-by: Greg Thelen
Reported-by: Wang Long
Acked-by: Wang Long
Acked-by: Michal Hocko
Reviewed-by: Andrew Morton
Cc: Johannes Weiner
Cc: Tejun Heo
Cc: Nicholas Piggin
Cc: [v4.2+]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The swap offset reported by /proc//pagemap may be not correct for
PMD migration entries. If addr passed into pagemap_pmd_range() isn't
aligned with PMD start address, the swap offset reported doesn't
reflect this. And in the loop to report information of each sub-page,
the swap offset isn't increased accordingly as that for PFN.This may happen after opening /proc//pagemap and seeking to a page
whose address doesn't align with a PMD start address. I have verified
this with a simple test program.BTW: migration swap entries have PFN information, do we need to restrict
whether to show them?[akpm@linux-foundation.org: fix typo, per Huang, Ying]
Link: http://lkml.kernel.org/r/20180408033737.10897-1-ying.huang@intel.com
Signed-off-by: "Huang, Ying"
Cc: Michal Hocko
Cc: "Kirill A. Shutemov"
Cc: Andrei Vagin
Cc: Dan Williams
Cc: "Jerome Glisse"
Cc: Daniel Colascione
Cc: Zi Yan
Cc: Naoya Horiguchi
Cc: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Li Wang has reported that LTP move_pages04 test fails with the current
tree:LTP move_pages04:
TFAIL : move_pages04.c:143: status[1] is EPERM, expected EFAULTThe test allocates an array of two pages, one is present while the other
is not (resp. backed by zero page) and it expects EFAULT for the second
page as the man page suggests. We are reporting EPERM which doesn't make
any sense and this is a result of a bug from cf5f16b23ec9 ("mm: unclutter
THP migration").do_pages_move tries to handle as many pages in one batch as possible so we
queue all pages with the same node target together and that corresponds to
[start, i] range which is then used to update status array.
add_page_for_migration will correctly notice the zero (resp. !present)
page and returns with EFAULT which gets written to the status. But if
this is the last page in the array we do not update start and so the last
store_status after the loop will overwrite the range of the last batch
with NUMA_NO_NODE (which corresponds to EPERM).Fix this by simply bailing out from the last flush if the pagelist is
empty as there is clearly nothing more to do.Link: http://lkml.kernel.org/r/20180418121255.334-1-mhocko@kernel.org
Fixes: cf5f16b23ec9 ("mm: unclutter THP migration")
Signed-off-by: Michal Hocko
Reported-by: Li Wang
Tested-by: Li Wang
Cc: Zi Yan
Cc: "Kirill A. Shutemov"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
One of the classes of kernel stack content leaks[1] is exposing the
contents of prior heap or stack contents when a new process stack is
allocated. Normally, those stacks are not zeroed, and the old contents
remain in place. In the face of stack content exposure flaws, those
contents can leak to userspace.Fixing this will make the kernel no longer vulnerable to these flaws, as
the stack will be wiped each time a stack is assigned to a new process.
There's not a meaningful change in runtime performance; it almost looks
like it provides a benefit.Performing back-to-back kernel builds before:
Run times: 157.86 157.09 158.90 160.94 160.80
Mean: 159.12
Std Dev: 1.54and after:
Run times: 159.31 157.34 156.71 158.15 160.81
Mean: 158.46
Std Dev: 1.46Instead of making this a build or runtime config, Andy Lutomirski
recommended this just be enabled by default.[1] A noisy search for many kinds of stack content leaks can be seen here:
https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=linux+kernel+stack+leakI did some more with perf and cycle counts on running 100,000 execs of
/bin/true.before:
Cycles: 218858861551 218853036130 214727610969 227656844122 224980542841
Mean: 221015379122.60
Std Dev: 4662486552.47after:
Cycles: 213868945060 213119275204 211820169456 224426673259 225489986348
Mean: 217745009865.40
Std Dev: 5935559279.99It continues to look like it's faster, though the deviation is rather
wide, but I'm not sure what I could do that would be less noisy. I'm
open to ideas!Link: http://lkml.kernel.org/r/20180221021659.GA37073@beast
Signed-off-by: Kees Cook
Acked-by: Michal Hocko
Reviewed-by: Andrew Morton
Cc: Andy Lutomirski
Cc: Laura Abbott
Cc: Rasmus Villemoes
Cc: Mel Gorman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Aurelien Aptel
Signed-off-by: Steve French
Reported-by: Long Li
