[lkml]   [2018]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch v3] mm, oom: fix unnecessary killing of additional processes
On Fri 06-07-18 17:05:39, David Rientjes wrote:
> Blockable mmu notifiers and mlocked memory is not the extent of the
> problem, if a process has a lot of virtual memory we must wait until
> free_pgtables() completes in exit_mmap() to prevent unnecessary oom
> killing. For implementations such as tcmalloc, which does not release
> virtual memory, this is important because, well, it releases this only at
> exit_mmap(). Of course we cannot do that with only the protection of
> mm->mmap_sem for read.

And how exactly a timeout helps to prevent from "unnecessary killing" in
that case?
Michal Hocko

 \ /
  Last update: 2018-07-09 14:35    [W:0.207 / U:0.364 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site