Subject: + vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix.patch added to -mm tree
To: akpm@xxxxxxxxxxxxxxxxxxxx,cl@xxxxxxxxx,dchinner@xxxxxxxxxx,sergey.senozhatsky@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Fri, 21 Mar 2014 14:07:54 -0700
The patch titled
Subject: vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix
has been added to the -mm tree. Its filename is
vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix
Add comment. Again.
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Dave Chinner <dchinner@xxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/vmstat.h | 4 ++++
1 file changed, 4 insertions(+)
diff -puN include/linux/vmstat.h~vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix include/linux/vmstat.h
--- a/include/linux/vmstat.h~vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix
+++ a/include/linux/vmstat.h
@@ -27,6 +27,10 @@ struct vm_event_state {
DECLARE_PER_CPU(struct vm_event_state, vm_event_states);
+/*
+ * vm counters are allowed to be racy. Use raw_cpu_ops to avoid the
+ * local_irq_disable overhead.
+ */
static inline void __count_vm_event(enum vm_event_item item)
{
raw_cpu_inc(vm_event_states.event[item]);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
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maintainers-akpm-maintenance.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
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ocfs2-flock-drop-cross-node-lock-when-failed-locally.patch
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mm-vmstat-fix-up-zone-state-accounting-fix.patch
mm-keep-page-cache-radix-tree-nodes-in-check-fix-fix.patch
mm-process_vm_accessc-mark-function-as-static-fix.patch
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drop_caches-add-some-documentation-and-info-message.patch
mmnuma-reorganize-change_pmd_range-fix.patch
drivers-lguest-page_tablesc-rename-do_set_pte.patch
mm-add-debugfs-tunable-for-fault_around_order-checkpatch-fixes.patch
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mm-compactionc-isolate_freepages_block-small-tuneup.patch
mm-vmallocc-enhance-vm_map_ram-comment-fix.patch
vmstat-use-raw_cpu_ops-to-avoid-false-positives-on-preemption-checks-fix.patch
zram-use-zcomp-compressing-backends-fix.patch
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do_shared_fault-check-that-mmap_sem-is-held.patch
include-linux-syscallsh-add-sys32_quotactl-prototype-fix.patch
sys_sysfs-add-config_sysfs_syscall-fix.patch
kernel-groupsc-remove-return-value-of-set_groups-fix.patch
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slub-use-raw_cpu_inc-for-incrementing-statistics-fix.patch
percpu-add-preemption-checks-to-__this_cpu-ops-fix-checkpatch-fixes.patch
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journal_add_journal_head-debug-fix.patch
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