On Mon, Mar 09 2015, David Rientjes wrote:
> 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.
>
> Cc: Greg Thelen <gthe...@google.com>
> Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
> Cc: Davidlohr Bueso <d...@stgolabs.net>
> Acked-by: "Kirill A. Shutemov" <kir...@shutemov.name>
> Signed-off-by: David Rientjes <rient...@google.com>
Looks good.
Acked-by: "Greg Thelen" <gthe...@google.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
