Naoya Horiguchi 6b79c57b92 mm: numa: disable change protection for vma(VM_HUGETLB) ...

Currently when a process accesses a hugetlb range protected with
PROTNONE, unexpected COWs are triggered, which finally puts the hugetlb
subsystem into a broken/uncontrollable state, where for example
h->resv_huge_pages is subtracted too much and wraps around to a very
large number, and the free hugepage pool is no longer maintainable.

This patch simply stops changing protection for vma(VM_HUGETLB) to fix
the problem.  And this also allows us to avoid useless overhead of minor
faults.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Suggested-by: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: David Rientjes <rientjes@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2015-04-07 16:45:33 -07:00

..

auto_group.c

sched/autogroup: Fix failure to set cpu.rt_runtime_us

2015-02-18 16:17:20 +01:00

auto_group.h

…

clock.c

kernel/sched/clock.c: add another clock for use with the soft lockup watchdog

2015-02-12 18:54:13 -08:00

completion.c

sched/completion: Serialize completion_done() with complete()

2015-02-18 14:27:40 +01:00

core.c

sched: Fix RLIMIT_RTTIME when PI-boosting to RT

2015-03-23 10:47:55 +01:00

cpuacct.c

cgroup: rename cgroup_subsys->base_cftypes to ->legacy_cftypes

2014-07-15 11:05:09 -04:00

cpuacct.h

…

cpudeadline.c

sched/deadline: Remove cpu_active_mask from cpudl_find()

2015-02-04 07:52:29 +01:00

cpudeadline.h

sched/deadline: Modify cpudl::free_cpus to reflect rd->online

2015-01-30 19:39:16 +01:00

cpupri.c

Merge commit '3cf2f34' into sched/core, to fix build error

2014-06-12 13:46:37 +02:00

cpupri.h

sched/cpupri: Remove unnecessary definitions in cpupri.h

2014-11-16 10:58:59 +01:00

cputime.c

sched, time: Fix build error with 64 bit cputime_t on 32 bit systems

2014-10-03 05:46:55 +02:00

deadline.c

sched/dl: Do update_rq_clock() in yield_task_dl()

2015-02-18 16:17:12 +01:00

debug.c

sched/debug: Print rq->clock_task

2015-01-14 13:34:22 +01:00

fair.c

mm: numa: disable change protection for vma(VM_HUGETLB)

2015-04-07 16:45:33 -07:00

features.h

sched: Rename capacity related flags

2014-06-05 11:52:32 +02:00

idle_task.c

sched: Provide update_curr callbacks for stop/idle scheduling classes

2014-11-23 14:14:40 -08:00

idle.c

cpuidle / sleep: Use broadcast timer for states that stop local timer

2015-03-05 23:13:19 +01:00

Makefile

ftrace: allow architectures to specify ftrace compile options

2015-01-29 09:19:19 +01:00

proc.c

cpuidle: menu: Lookup CPU runqueues less

2014-08-06 21:17:45 +02:00

rt.c

sched/rt: Reduce rq lock contention by eliminating locking of non-feasible target

2015-01-30 19:38:49 +01:00

sched.h

sched: Make dl_task_time() use task_rq_lock()

2015-02-18 14:27:30 +01:00

stats.c

sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

stats.h

…

stop_task.c

sched: Provide update_curr callbacks for stop/idle scheduling classes

2014-11-23 14:14:40 -08:00

wait.c

sched/wait: Fix a kthread race with wait_woken()

2014-11-04 07:17:44 +01:00