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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-01 03:56:56 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-01 03:56:56 +0300 |
| commit | 1b2614f1dd687d79d413cf34f69b003bbe385709 (patch) | |
| tree | ee8235dffc263a9e1113d9935f5bbe920f5a82ec /mm | |
| parent | ea25c43179462e342d4a0e66c3f6a5f53514da05 (diff) | |
| parent | e66186920bff278b18ebe460c710c7b0e0cfdf6e (diff) | |
| download | linux-1b2614f1dd687d79d413cf34f69b003bbe385709.tar.xz | |
Merge branch 'akpm' (patches from Andrew)
Merge more fixes from Andrew Morton:
"6 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
scripts/dtc: fix '%zx' warning
include/linux/compiler.h: don't perform compiletime_assert with -O0
mm, madvise: ensure poisoned pages are removed from per-cpu lists
mm, uprobes: fix multiple free of ->uprobes_state.xol_area
kernel/kthread.c: kthread_worker: don't hog the cpu
mm,page_alloc: don't call __node_reclaim() with oom_lock held.
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/madvise.c | 6 | ||||
| -rw-r--r-- | mm/page_alloc.c | 9 |
2 files changed, 12 insertions, 3 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index 23ed525bc2bc..4d7d1e5ddba9 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -613,6 +613,7 @@ static int madvise_inject_error(int behavior, unsigned long start, unsigned long end) { struct page *page; + struct zone *zone; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -646,6 +647,11 @@ static int madvise_inject_error(int behavior, if (ret) return ret; } + + /* Ensure that all poisoned pages are removed from per-cpu lists */ + for_each_populated_zone(zone) + drain_all_pages(zone); + return 0; } #endif diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 7a58eb5757e3..1423da8dd16f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3291,10 +3291,13 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order, /* * Go through the zonelist yet one more time, keep very high watermark * here, this is only to catch a parallel oom killing, we must fail if - * we're still under heavy pressure. + * we're still under heavy pressure. But make sure that this reclaim + * attempt shall not depend on __GFP_DIRECT_RECLAIM && !__GFP_NORETRY + * allocation which will never fail due to oom_lock already held. */ - page = get_page_from_freelist(gfp_mask | __GFP_HARDWALL, order, - ALLOC_WMARK_HIGH|ALLOC_CPUSET, ac); + page = get_page_from_freelist((gfp_mask | __GFP_HARDWALL) & + ~__GFP_DIRECT_RECLAIM, order, + ALLOC_WMARK_HIGH|ALLOC_CPUSET, ac); if (page) goto out; |