25 Jul, 2008
6 commits
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This patch introduces the new syscall pipe2 which is like pipe but it also
takes an additional parameter which takes a flag value. This patch implements
the handling of O_CLOEXEC for the flag. I did not add support for the new
syscall for the architectures which have a special sys_pipe implementation. I
think the maintainers of those archs have the chance to go with the unified
implementation but that's up to them.The implementation introduces do_pipe_flags. I did that instead of changing
all callers of do_pipe because some of the callers are written in assembler.
I would probably screw up changing the assembly code. To avoid breaking code
do_pipe is now a small wrapper around do_pipe_flags. Once all callers are
changed over to do_pipe_flags the old do_pipe function can be removed.The following test must be adjusted for architectures other than x86 and
x86-64 and in case the syscall numbers changed.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include
#include
#include
#include#ifndef __NR_pipe2
# ifdef __x86_64__
# define __NR_pipe2 293
# elif defined __i386__
# define __NR_pipe2 331
# else
# error "need __NR_pipe2"
# endif
#endifint
main (void)
{
int fd[2];
if (syscall (__NR_pipe2, fd, 0) != 0)
{
puts ("pipe2(0) failed");
return 1;
}
for (int i = 0; i < 2; ++i)
{
int coe = fcntl (fd[i], F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if (coe & FD_CLOEXEC)
{
printf ("pipe2(0) set close-on-exit for fd[%d]\n", i);
return 1;
}
}
close (fd[0]);
close (fd[1]);if (syscall (__NR_pipe2, fd, O_CLOEXEC) != 0)
{
puts ("pipe2(O_CLOEXEC) failed");
return 1;
}
for (int i = 0; i < 2; ++i)
{
int coe = fcntl (fd[i], F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if ((coe & FD_CLOEXEC) == 0)
{
printf ("pipe2(O_CLOEXEC) does not set close-on-exit for fd[%d]\n", i);
return 1;
}
}
close (fd[0]);
close (fd[1]);puts ("OK");
return 0;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Signed-off-by: Ulrich Drepper
Acked-by: Davide Libenzi
Cc: Michael Kerrisk
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Almost all users of this field need a PFN instead of a physical address,
so replace node_boot_start with node_min_pfn.[Lee.Schermerhorn@hp.com: fix spurious BUG_ON() in mark_bootmem()]
Signed-off-by: Johannes Weiner
Cc:
Signed-off-by: Lee Schermerhorn
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Straight forward extensions for huge pages located in the PUD instead of
PMDs.Signed-off-by: Andi Kleen
Signed-off-by: Nick Piggin
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The goal of this patchset is to support multiple hugetlb page sizes. This
is achieved by introducing a new struct hstate structure, which
encapsulates the important hugetlb state and constants (eg. huge page
size, number of huge pages currently allocated, etc).The hstate structure is then passed around the code which requires these
fields, they will do the right thing regardless of the exact hstate they
are operating on.This patch adds the hstate structure, with a single global instance of it
(default_hstate), and does the basic work of converting hugetlb to use the
hstate.Future patches will add more hstate structures to allow for different
hugetlbfs mounts to have different page sizes.[akpm@linux-foundation.org: coding-style fixes]
Acked-by: Adam Litke
Acked-by: Nishanth Aravamudan
Signed-off-by: Andi Kleen
Signed-off-by: Nick Piggin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The double indirection here is not needed anywhere and hence (at least)
confusing.Signed-off-by: Jan Beulich
Cc: Hugh Dickins
Cc: Nick Piggin
Cc: Christoph Lameter
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: "Luck, Tony"
Cc: Paul Mundt
Cc: "David S. Miller"
Acked-by: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are a lot of places that define either a single bootmem descriptor or an
array of them. Use only one central array with MAX_NUMNODES items instead.Signed-off-by: Johannes Weiner
Acked-by: Ralf Baechle
Cc: Ingo Molnar
Cc: Richard Henderson
Cc: Russell King
Cc: Tony Luck
Cc: Hirokazu Takata
Cc: Geert Uytterhoeven
Cc: Kyle McMartin
Cc: Paul Mackerras
Cc: Paul Mundt
Cc: David S. Miller
Cc: Yinghai Lu
Cc: Christoph Lameter
Cc: Mel Gorman
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
22 Jul, 2008
2 commits
-
This allow to dynamically generate attributes and share show/store
functions between attributes. Right now most attributes are generated
by special macros and lots of duplicated code. With the attribute
passed it's instead possible to attach some data to the attribute
and then use that in shared low level functions to do different things.I need this for the dynamically generated bank attributes in the x86
machine check code, but it'll allow some further cleanups.I converted all users in tree to the new show/store prototype. It's a single
huge patch to avoid unbisectable sections.Runtime tested: x86-32, x86-64
Compiled only: ia64, powerpc
Not compile tested/only grep converted: sh, arm, avr32Signed-off-by: Andi Kleen
Signed-off-by: Greg Kroah-Hartman -
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: (25 commits)
mmtimer: Push BKL down into the ioctl handler
[IA64] Remove experimental status of kdump
[IA64] Update ia64 mmr list for SGI uv
[IA64] Avoid overflowing ia64_cpu_to_sapicid in acpi_map_lsapic()
[IA64] adding parameter check to module_free()
[IA64] improper printk format in acpi-cpufreq
[IA64] pv_ops: move some functions in ivt.S to avoid lack of space.
[IA64] pvops: documentation on ia64/pv_ops
[IA64] pvops: add to hooks, pv_time_ops, for steal time accounting.
[IA64] pvops: add hooks, pv_irq_ops, to paravirtualized irq related operations.
[IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic.
[IA64] pvops: define initialization hooks, pv_init_ops, for paravirtualized environment.
[IA64] pvops: paravirtualize NR_IRQS
[IA64] pvops: paravirtualize entry.S
[IA64] pvops: paravirtualize ivt.S
[IA64] pvops: paravirtualize minstate.h.
[IA64] pvops: define paravirtualized instructions for native.
[IA64] pvops: preparation for paravirtulization of hand written assembly code.
[IA64] pvops: introduce pv_cpu_ops to paravirtualize privileged instructions.
[IA64] pvops: add an early setup hook for pv_ops.
...
21 Jul, 2008
2 commits
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* 'kvm-updates-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (70 commits)
KVM: Adjust smp_call_function_mask() callers to new requirements
KVM: MMU: Fix potential race setting upper shadow ptes on nonpae hosts
KVM: x86 emulator: emulate clflush
KVM: MMU: improve invalid shadow root page handling
KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destruction
KVM: Prefix some x86 low level function with kvm_, to avoid namespace issues
KVM: check injected pic irq within valid pic irqs
KVM: x86 emulator: Fix HLT instruction
KVM: Apply the kernel sigmask to vcpus blocked due to being uninitialized
KVM: VMX: Add ept_sync_context in flush_tlb
KVM: mmu_shrink: kvm_mmu_zap_page requires slots_lock to be held
x86: KVM guest: make kvm_smp_prepare_boot_cpu() static
KVM: SVM: fix suspend/resume support
KVM: s390: rename private structures
KVM: s390: Set guest storage limit and offset to sane values
KVM: Fix memory leak on guest exit
KVM: s390: dont allocate dirty bitmap
KVM: move slots_lock acquision down to vapic_exit
KVM: VMX: Fake emulate Intel perfctr MSRs
KVM: VMX: Fix a wrong usage of vmcs_config
... -
Noted by Tony Luck although I've done the patches differently and also
removed some other bogus oddments.Signed-off-by: Alan Cox
Signed-off-by: Linus Torvalds
20 Jul, 2008
4 commits
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Flush the shadow mmu before removing regions to avoid stale entries.
Signed-off-by: Marcelo Tosatti
Signed-off-by: Avi Kivity -
This patch enables coalesced MMIO for ia64 architecture.
It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO.
It enables the compilation of coalesced_mmio.c.[akpm: fix compile error on ia64]
Signed-off-by: Laurent Vivier
Signed-off-by: Andrew Morton
Signed-off-by: Avi Kivity -
Modify member in_range() of structure kvm_io_device to pass length and the type
of the I/O (write or read).This modification allows to use kvm_io_device with coalesced MMIO.
Signed-off-by: Laurent Vivier
Signed-off-by: Avi Kivity -
Obsoleted by the vmx-specific per-cpu list.
Signed-off-by: Avi Kivity
18 Jul, 2008
6 commits
-
This patch removes the experimental status of kdump on IA64. kdump is on IA64
now since more than one year and it has proven to be stable.Signed-off-by: Bernhard Walle
Signed-off-by: Tony Luck -
acpi_map_lsapic tries to stuff a long into ia64_cpu_to_sapicid[],
which can only hold ints, so let's fix that.We need to update the signature of acpi_map_cpu2node() too.
Signed-off-by: Alex Chiang
Signed-off-by: Tony Luck -
module_free() refers the first parameter before checking.
But it is called like below(in kernel/kprobes). The first parameter is always NULL.
This happens when many probe points(>1024) are set by kprobes.
I encountered this with using SystemTap. It can set many probes easily.static int __kprobes collect_one_slot(struct kprobe_insn_page *kip, int idx)
{
...
if (kip->nused == 0) {
hlist_del(&kip->hlist);
if (hlist_empty(&kprobe_insn_pages)) {
...
} else {
module_free(NULL, kip->insns); //<<< 1st param always NULL
kfree(kip);
}
return 1;
}
return 0;
}Signed-off-by: Akiyama, Nobuyuki
Signed-off-by: Tony Luck -
When dprintk is enabled the following warnings are generated:
arch/ia64/kernel/cpufreq/acpi-cpufreq.c: In function 'processor_set_pstate':
arch/ia64/kernel/cpufreq/acpi-cpufreq.c:54: warning: format '%x' expects type 'unsigned int', but argumen
t 3 has type 's64'
arch/ia64/kernel/cpufreq/acpi-cpufreq.c: In function 'processor_get_pstate':
arch/ia64/kernel/cpufreq/acpi-cpufreq.c:76: warning: format '%x' expects type 'unsigned int', but argumen
t 2 has type 's64'Signed-off-by: Denis V. Lunev
Signed-off-by: Tony Luck -
Fix calls of smp_call_function*() in arch/ia64/kvm for recent API
changes.CC [M] arch/ia64/kvm/kvm-ia64.o
arch/ia64/kvm/kvm-ia64.c: In function 'handle_global_purge':
arch/ia64/kvm/kvm-ia64.c:398: error: too many arguments to function 'smp_call_function_single'
arch/ia64/kvm/kvm-ia64.c: In function 'kvm_vcpu_kick':
arch/ia64/kvm/kvm-ia64.c:1696: error: too many arguments to function 'smp_call_function_single'Signed-off-by: Takashi Iwai
Acked-by Xiantao Zhang
Signed-off-by: Linus Torvalds
17 Jul, 2008
2 commits
-
"idle=nomwait" disables the use of the MWAIT
instruction from both C1 (C1_FFH) and deeper (C2C3_FFH)
C-states.When MWAIT is unavailable, the BIOS and OS generally
negotiate to use the HALT instruction for C1,
and use IO accesses for deeper C-states.This option is useful for power and performance
comparisons, and also to work around BIOS bugs
where broken MWAIT support is advertised.http://bugzilla.kernel.org/show_bug.cgi?id=10807
http://bugzilla.kernel.org/show_bug.cgi?id=10914Signed-off-by: Zhao Yakui
Signed-off-by: Li Shaohua
Signed-off-by: Len Brown
Signed-off-by: Andi Kleen -
"idle=halt" limits the idle loop to using
the halt instruction. No MWAIT, no IO accesses,
no C-states deeper than C1.If something is broken in the idle code,
"idle=halt" is a less severe workaround
than "idle=poll" which disables all power savings.Signed-off-by: Zhao Yakui
Signed-off-by: Len Brown
Signed-off-by: Andi Kleen
16 Jul, 2008
2 commits
-
…l/git/tip/linux-2.6-tip
* 'generic-ipi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits)
generic-ipi: more merge fallout
generic-ipi: merge fix
x86, visws: use mach-default/entry_arch.h
x86, visws: fix generic-ipi build
generic-ipi: fixlet
generic-ipi: fix s390 build bug
generic-ipi: fix linux-next tree build failure
fix: "smp_call_function: get rid of the unused nonatomic/retry argument"
fix: "smp_call_function: get rid of the unused nonatomic/retry argument"
fix "smp_call_function: get rid of the unused nonatomic/retry argument"
on_each_cpu(): kill unused 'retry' parameter
smp_call_function: get rid of the unused nonatomic/retry argument
sh: convert to generic helpers for IPI function calls
parisc: convert to generic helpers for IPI function calls
mips: convert to generic helpers for IPI function calls
m32r: convert to generic helpers for IPI function calls
arm: convert to generic helpers for IPI function calls
alpha: convert to generic helpers for IPI function calls
ia64: convert to generic helpers for IPI function calls
powerpc: convert to generic helpers for IPI function calls
...Fix trivial conflicts due to rcu updates in kernel/rcupdate.c manually
-
Conflicts:
arch/powerpc/Kconfig
arch/s390/kernel/time.c
arch/x86/kernel/apic_32.c
arch/x86/kernel/cpu/perfctr-watchdog.c
arch/x86/kernel/i8259_64.c
arch/x86/kernel/ldt.c
arch/x86/kernel/nmi_64.c
arch/x86/kernel/smpboot.c
arch/x86/xen/smp.c
include/asm-x86/hw_irq_32.h
include/asm-x86/hw_irq_64.h
include/asm-x86/mach-default/irq_vectors.h
include/asm-x86/mach-voyager/irq_vectors.h
include/asm-x86/smp.h
kernel/MakefileSigned-off-by: Ingo Molnar
11 Jul, 2008
1 commit
-
Conflicts:
include/linux/rculist.h
kernel/rcupreempt.cSigned-off-by: Ingo Molnar
01 Jul, 2008
2 commits
-
The symbol account_system_vtime is used by the kvm module but
not exported. This breaks building with CONFIG_VIRT_CPU_ACCOUNTING
and CONFIG_KVM=m.Signed-off-by: Doug Chapman
Acked-by: Hidetosho Seto
Signed-off-by: Tony Luck -
On a system where there are no hot pluggable cpus "additional_cpus"
is still set to -1 at the point where we call per_cpu_scan_finalize().
If we didn't find an SRAT table and so pick the default "32" for the
number of cpus, when we get to:
high_cpu = min(high_cpu + reserve_cpus, NR_CPUS);
we will end up initializing for just 31 cpus ... and so we will
die horribly when bringing up cpu#32.Problem introduced by: 2c6e6db41f01b6b4eb98809350827c9678996698
"Minimize per_cpu reservations."Acked-by: Robin Holt
Signed-off-by: Tony Luck
26 Jun, 2008
4 commits
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It's not even passed on to smp_call_function() anymore, since that
was removed. So kill it.Acked-by: Jeremy Fitzhardinge
Reviewed-by: Paul E. McKenney
Signed-off-by: Jens Axboe -
It's never used and the comments refer to nonatomic and retry
interchangably. So get rid of it.Acked-by: Jeremy Fitzhardinge
Signed-off-by: Jens Axboe -
This converts ia64 to use the new helpers for smp_call_function() and
friends, and adds support for smp_call_function_single().Cc: Tony Luck
Signed-off-by: Jens Axboe
25 Jun, 2008
3 commits
-
As noted by Akinobu Mita alloc_bootmem and related functions never return
NULL and always return a zeroed region of memory. Thus a NULL test or
memset after calls to these functions is unnecessary.Signed-off-by: Julia Lawall
Signed-off-by: Tony Luck -
The fix applied in e0c6d97c65e0784aade7e97b9411f245a6c543e7
"security hole in sn2_ptc_proc_write" didn't take into account
the case where count==0 (which results in a buffer underrun
when adding the trailing '\0'). Thanks to Andi Kleen for
pointing this out.Signed-off-by: Cliff Wickman
Signed-off-by: Tony Luck -
Call check_sal_cache_flush() after platform_setup() as
check_sal_cache_flush() now relies on being able to call platform
vector code.Problem was introduced by: 3463a93def55c309f3c0d0a8aaf216be3be42d64
"Update check_sal_cache_flush to use platform_send_ipi()"Signed-off-by: Jes Sorensen
Tested-by: Alex Chiang:
Signed-off-by: Tony Luck
23 Jun, 2008
1 commit
21 Jun, 2008
1 commit
-
Security hole in sn2_ptc_proc_write
It is possible to overrun a buffer with a write to this /proc file.
Signed-off-by: Cliff Wickman
Signed-off-by: Tony Luck
17 Jun, 2008
2 commits
-
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Fix CONFIG_IA64_SGI_UV build error
[IA64] Update check_sal_cache_flush to use platform_send_ipi()
[IA64] perfmon: fix async exit bug -
Fix build error in CONFIG_IA64_SGI_UV config. (GENERIC builds
are ok).Signed-off-by: Jack Steiner
Signed-off-by: Tony Luck
16 Jun, 2008
1 commit
12 Jun, 2008
1 commit
-
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (23 commits)
ACPICA: fix stray va_end() caused by mis-merge
ACPI: Reject below-freezing temperatures as invalid critical temperatures
ACPICA: Fix for access to deleted object
ACPICA: Fix to make _SST method optional
ACPICA: Fix for Load operator, load table at the namespace root
ACPICA: Ignore ACPI table signature for Load() operator
ACPICA: Fix to allow zero-length ASL field declarations
ACPI: use memory_read_from_buffer()
bay: exit if notify handler cannot be installed
dock.c remove trailing printk whitespace
proper prototype for acpi_processor_tstate_has_changed()
ACPI: handle invalid ACPI SLIT table
PNPACPI: use _CRS IRQ descriptor length for _SRS
pnpacpi: fix shareable IRQ encode/decode
pnpacpi: fix IRQ flag decoding
MAINTAINERS: update ACPI homepage
ACPI 2.6.26-rc2: Add missing newline to DSDT/SSDT warning message
ACPI: EC: Use msleep instead of udelay while waiting for event.
thinkpad-acpi: fix LED handling on older ThinkPads
thinkpad-acpi: fix initialization error paths
...