The patch titled
mm: do not iterate over NR_CPUS in __zone_pcp_update()
has been added to the -mm tree. Its filename is
mm-do-not-iterate-over-nr_cpus-in-__zone_pcp_update.patch
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------------------------------------------------------
Subject: mm: do not iterate over NR_CPUS in __zone_pcp_update()
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
__zone_pcp_update() iterates over NR_CPUS instead of limiting the access
to the possible cpus. This might result in access to uninitialized areas
as the per cpu allocator only populates the per cpu memory for possible
cpus.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Acked-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Mel Gorman <mel@xxxxxxxxx>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-do-not-iterate-over-nr_cpus-in-__zone_pcp_update mm/page_alloc.c
--- a/mm/page_alloc.c~mm-do-not-iterate-over-nr_cpus-in-__zone_pcp_update
+++ a/mm/page_alloc.c
@@ -3243,7 +3243,7 @@ static int __zone_pcp_update(void *data)
int cpu;
unsigned long batch = zone_batchsize(zone), flags;
- for (cpu = 0; cpu < NR_CPUS; cpu++) {
+ for_each_possible_cpu(cpu) {
struct per_cpu_pageset *pset;
struct per_cpu_pages *pcp;
_
Patches currently in -mm which might be from tglx@xxxxxxxxxxxxx are
linux-next.patch
mm-do-not-iterate-over-nr_cpus-in-__zone_pcp_update.patch
arch-x86-kernel-rebootc-add-imac91-to-pci_reboot_dmi_table.patch
arch-x86-kernel-hpetc-fix-bug-in-rtc-emulation.patch
timer-stats-fix-del_timer_sync-and-try_to_del_timer_sync.patch
posix-cpu-timers-reset-expire-cache-when-no-timer-is-running.patch
hrtimer-correct-a-few-numbers-in-comments.patch
clockevents-ensure-taht-min_delta_ns-is-increased-in-error-path.patch
timers-introduce-the-concept-of-timer-slack-for-legacy-timers.patch
cpu-timers-simplify-rlimit_cpu-handling.patch
cpu-timers-cleanup-arm_timer.patch
cpu-timers-return-correct-previous-timer-reload-value.patch
cpu-timers-change-sigev_none-timer-implementation.patch
cpu-timers-assure-to-not-iterate-over-all-threads-in-fastpath_timer_check.patch
cpu-timers-optimize-run_posix_cpu_timers.patch
cs5535-clockevt-free-timer-in-irq-setup-error-path.patch
timer-print-function-name-for-timer-callbacks-modifying-preemption-count.patch
time-clean-up-warp_clock.patch
time-clean-up-direct-xtime-usage-in-xen.patch
core-kernel-make-sparse-work-with-inline-spinlocks-and-rwlocks.patch
kernel-irq-procc-expose-the-irq_desc-node-in-proc-irq.patch
genirq-warn-about-irqf_sharedirqf_disabled-at-the-right-place.patch
genirq-introduce-irqf_allow_nested-flag-for-request_irq.patch
xtensa-fix-unnecessary-setting-of-xtime.patch
add-generic-sys_old_select.patch
add-generic-sys_old_mmap.patch
add-generic-sys_ipc-wrapper.patch
add-generic-sys_ipc-wrapper-fix.patch
improve-sys_personality-for-compat-architectures.patch
improve-sys_newuname-for-compat-architectures.patch
add-generic-sys_olduname.patch
documentation-timers-split-txt-and-source-files.patch
sysctl-extern-cleanup-rtmutex.patch
sysctl-extern-cleanup-lockdep.patch
pci-dma-add-include-linux-pci-dmah.patch
pci-dma-x86-use-include-linux-pci-dmah.patch
time-kill-off-config_generic_time.patch
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