Messages in this thread | | | Date | Mon, 09 Mar 2015 16:53:30 -0400 | From | Rik van Riel <> | Subject | Re: [patch v3] mm, hugetlb: abort __get_user_pages if current has been oom killed |
| |
On 03/09/2015 04:07 PM, 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 <gthelen@google.com> > Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> > Cc: Davidlohr Bueso <dave@stgolabs.net> > Acked-by: "Kirill A. Shutemov" <kirill@shutemov.name> > Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Rik van Riel <riel@redhat.com>
| |