On Mon, Mar 09, 2015 at 12:42:15AM -0700, 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 > be overcharged to its memcg since it has access to memory reserves or > could potentially deplete all system 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: Naoya Horiguchi <n-horigu...@ah.jp.nec.com> > Cc: Davidlohr Bueso <d...@stgolabs.net> > Cc: "Kirill A. Shutemov" <kir...@shutemov.name> > Signed-off-by: David Rientjes <rient...@google.com>
Acked-by: Kirill A. Shutemo <kirill.shute...@linux.intel.com> -- Kirill A. Shutemov -- 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/