Re: How to handle TIF_MEMDIE stalls?

Michal Hocko
2015-02-18T14:26:01Z

On Wed 18-02-15 23:06:17, Tetsuo Handa wrote:
> Michal Hocko wrote:
> > Tetsuo Handa wrote:
> > > Michal Hocko wrote:
> > > > Because they cannot perform any IO/FS transactions and that would lead
> > > > to a premature OOM conditions way too easily. OOM killer is a _last
> > > > resort_ reclaim opportunity not something that would happen just because
> > > > you happen to be not able to flush dirty pages.
> > >
> > > But you should not have applied such change without making necessary
> > > changes to GFP_NOFS / GFP_NOIO users with such expectation and testing
> > > at linux-next.git . Applying such change after 3.19-rc6 is a sucker punch.
> >
> > This is a nonsense. OOM was disbaled for !__GFP_FS for ages (since
> > before git era).
> >
> Then, at least I expect that filesystem error actions will not be taken so
> trivially. Can we apply http://marc.info/?l=linux-mm&m=142418465615672&w=2 for
> Linux 3.19-stable?

I do not understand. What kind of bug would be fixed by that change?

--
Michal Hocko
SUSE Labs