Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 27 Jun 2017 14:03:17 +0200 | From | Michal Hocko <> | Subject | Re: [RFC PATCH] mm, oom: allow oom reaper to race with exit_mmap |
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On Tue 27-06-17 20:39:28, Tetsuo Handa wrote: > Michal Hocko wrote: > > > I wonder why you prefer timeout based approach. Your patch will after all > > > set MMF_OOM_SKIP if operations between down_write() and up_write() took > > > more than one second. > > > > if we reach down_write then we have unmapped the address space in > > exit_mmap and oom reaper cannot do much more. > > So, by the time down_write() is called, majority of memory is already released, isn't it?
In most cases yes. To be put it in other words. By the time exit_mmap takes down_write there is nothing more oom reaper could reclaim.
-- Michal Hocko SUSE Labs
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