Re: [PATCH v4] mm,thp,shmem: limit shmem THP alloc gfp_mask

2020-10-24 Thread Rik van Riel
On Sat, 2020-10-24 at 03:09 +0100, Matthew Wilcox wrote: > On Fri, Oct 23, 2020 at 08:48:04PM -0400, Rik van Riel wrote: > > The allocation flags of anonymous transparent huge pages can be > > controlled > > through the files in /sys/kernel/mm/transparent_hugepage/defrag, > > which can > > help the

Re: [PATCH v4] mm,thp,shmem: limit shmem THP alloc gfp_mask

2020-10-23 Thread Matthew Wilcox
On Fri, Oct 23, 2020 at 08:48:04PM -0400, Rik van Riel wrote: > The allocation flags of anonymous transparent huge pages can be controlled > through the files in /sys/kernel/mm/transparent_hugepage/defrag, which can > help the system from getting bogged down in the page reclaim and compaction > cod

[PATCH v4] mm,thp,shmem: limit shmem THP alloc gfp_mask

2020-10-23 Thread Rik van Riel
The allocation flags of anonymous transparent huge pages can be controlled through the files in /sys/kernel/mm/transparent_hugepage/defrag, which can help the system from getting bogged down in the page reclaim and compaction code when many THPs are getting allocated simultaneously. However, the g