On Mon, Nov 23, 2015 at 03:22:31PM +0300, Vladimir Davydov wrote: > When the memory.high threshold is exceeded, try_charge() schedules a > task_work to reclaim the excess. The reclaim target is set to the number > of pages requested by try_charge(). This is wrong, because try_charge() > usually charges more pages than requested (batch > nr_pages) in order to > refill per cpu stocks. As a result, a process in a cgroup can easily > exceed memory.high significantly when doing a lot of charges w/o > returning to userspace (e.g. reading a file in big chunks). > > Fix this issue by assuring that when exceeding memory.high a process > reclaims as many pages as were actually charged (i.e. batch). > > Signed-off-by: Vladimir Davydov <[email protected]>
Acked-by: Johannes Weiner <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
