From: Johannes Weiner Date: Thu, 31 Oct 2013 23:34:13 +0000 (-0700) Subject: mm: memcg: use proper memcg in limit bypass X-Git-Tag: v3.12~10^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3168ecbe1c04ec3feb7cb42388a17d7f047fe1a2;p=pandora-kernel.git mm: memcg: use proper memcg in limit bypass Commit 84235de394d9 ("fs: buffer: move allocation failure loop into the allocator") allowed __GFP_NOFAIL allocations to bypass the limit if they fail to reclaim enough memory for the charge. But because the main test case was on a 3.2-based system, the patch missed the fact that on newer kernels the charge function needs to return root_mem_cgroup when bypassing the limit, and not NULL. This will corrupt whatever memory is at NULL + percpu pointer offset. Fix this quickly before problems are reported. Signed-off-by: Johannes Weiner Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-diff-tree failed