On 2016.09.05 at 18:42 +0200, Greg Kroah-Hartman wrote: > This is the start of the stable review cycle for the 4.7.3 release. > There are 143 patches in this series, all will be posted as a response > to this one. If anyone has any issues with these being applied, please > let me know. > > Responses should be made by Wed Sep 7 16:44:10 UTC 2016. > Anything received after that time might be too late.
As far as I can see this missing an rather important mm fix from Michal Hocko. commit 6b4e3181d7bd5ca5ab6f45929e4a5ffa7ab4ab7f Author: Michal Hocko <[email protected]> Date: Thu Sep 1 16:14:41 2016 -0700 mm, oom: prevent premature OOM killer invocation for high order request There have been several reports about pre-mature OOM killer invocation in 4.7 kernel when order-2 allocation request (for the kernel stack) invoked OOM killer even during basic workloads (light IO or even kernel compile on some filesystems). In all reported cases the memory is fragmented and there are no order-2+ pages available. There is usually a large amount of slab memory (usually dentries/inodes) and further debugging has shown that there are way too many unmovable blocks which are skipped during the compaction. Multiple reporters have confirmed that the current linux-next which includes [1] and [2] helped and OOMs are not reproducible anymore. A simpler fix for the late rc and stable is to simply ignore the compaction feedback and retry as long as there is a reclaim progress and we are not getting OOM for order-0 pages. We already do that for CONFING_COMPACTION=n so let's reuse the same code when compaction is enabled as well. [1] http://lkml.kernel.org/r/[email protected] [2] http://lkml.kernel.org/r/[email protected] Fixes: 0a0337e0d1d1 ("mm, oom: rework oom detection") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Michal Hocko <[email protected]> Tested-by: Olaf Hering <[email protected]> Tested-by: Ralf-Peter Rohbeck <[email protected]> Cc: Markus Trippelsdorf <[email protected]> Cc: Arkadiusz Miskiewicz <[email protected]> Cc: Ralf-Peter Rohbeck <[email protected]> Cc: Jiri Slaby <[email protected]> Cc: Vlastimil Babka <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Tetsuo Handa <[email protected]> Cc: David Rientjes <[email protected]> Cc: <[email protected]> [4.7.x] Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> -- Markus
