Re: [PATCH] mm: fix false-positive OVERCOMMIT_GUESS failures

2019-04-17 Thread Johannes Weiner
On Wed, Apr 17, 2019 at 02:04:17PM +0200, Vlastimil Babka wrote: > On 4/12/19 10:06 PM, Roman Gushchin wrote: > > On Fri, Apr 12, 2019 at 03:14:18PM -0400, Johannes Weiner wrote: > >> With the default overcommit==guess we occasionally run into mmap > >> rejections despite plenty of memory that

Re: [PATCH] mm: fix false-positive OVERCOMMIT_GUESS failures

2019-04-17 Thread Vlastimil Babka
On 4/12/19 10:06 PM, Roman Gushchin wrote: > On Fri, Apr 12, 2019 at 03:14:18PM -0400, Johannes Weiner wrote: >> With the default overcommit==guess we occasionally run into mmap >> rejections despite plenty of memory that would get dropped under >> pressure but just isn't accounted reclaimable.

Re: [PATCH] mm: fix false-positive OVERCOMMIT_GUESS failures

2019-04-12 Thread Roman Gushchin
On Fri, Apr 12, 2019 at 03:14:18PM -0400, Johannes Weiner wrote: > With the default overcommit==guess we occasionally run into mmap > rejections despite plenty of memory that would get dropped under > pressure but just isn't accounted reclaimable. One example of this is > dying cgroups pinned by

[PATCH] mm: fix false-positive OVERCOMMIT_GUESS failures

2019-04-12 Thread Johannes Weiner
With the default overcommit==guess we occasionally run into mmap rejections despite plenty of memory that would get dropped under pressure but just isn't accounted reclaimable. One example of this is dying cgroups pinned by some page cache. A previous case was auxiliary path name memory associated