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| author |   David Rientjes <rientjes@google.com> | 2015-04-14 15:48:24 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 16:49:06 -0700 |
| commit | 02057967b5d3b77ed47f06ee8fe98e2687fdf18b (patch) | |
| tree | 34bf831d910f420dff383af2758e1268b30e8360 /mm/memtest.c | |
| parent | mm, mempool: do not allow atomic resizing (diff) | |
| download | linux-dev-02057967b5d3b77ed47f06ee8fe98e2687fdf18b.tar.xz linux-dev-02057967b5d3b77ed47f06ee8fe98e2687fdf18b.zip | |
mm, hugetlb: abort __get_user_pages if current has been oom killed
If __get_user_pages() is faulting a significant number of hugetlb pages,
usually as the result of mmap(MAP_LOCKED), it can potentially allocate a
very large amount of memory.
If the process has been oom killed, this will cause a lot of memory to
potentially deplete memory reserves.
In the same way that commit 4779280d1ea4 ("mm: make get_user_pages()
interruptible") aborted for pending SIGKILLs when faulting non-hugetlb
memory, based on the premise of commit 462e00cc7151 ("oom: stop
allocating user memory if TIF_MEMDIE is set"), hugetlb page faults now
terminate when the process has been oom killed.
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Greg Thelen <gthelen@google.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memtest.c')
0 files changed, 0 insertions, 0 deletions