On Tue 05-12-17 20:14:37, Michal Hocko wrote:
> On Tue 05-12-17 10:31:12, Linus Torvalds wrote:
> > On Tue, Dec 5, 2017 at 6:58 AM, Michal Hocko wrote:
> > >
> > > This all is nice but tlb_gather users are not aware of that and this can
> > > actually cause some real problems. E.g. the oom_reaper
On Tue 05-12-17 10:31:12, Linus Torvalds wrote:
> On Tue, Dec 5, 2017 at 6:58 AM, Michal Hocko wrote:
> >
> > This all is nice but tlb_gather users are not aware of that and this can
> > actually cause some real problems. E.g. the oom_reaper tries to reap the
> > whole address space but it might r
On Tue, Dec 5, 2017 at 6:58 AM, Michal Hocko wrote:
>
> This all is nice but tlb_gather users are not aware of that and this can
> actually cause some real problems. E.g. the oom_reaper tries to reap the
> whole address space but it might race with threads accessing the memory [1].
> It is possibl
From: Michal Hocko
5a7862e83000 ("arm64: tlbflush: avoid flushing when fullmm == 1") has
introduced an optimization to not flush tlb when we are tearing the
whole address space down. Will goes on to explain
: Basically, we tag each address space with an ASID (PCID on x86) which
: is resident in
On Tue 28-11-17 19:00:01, Will Deacon wrote:
> On Thu, Nov 23, 2017 at 10:02:36AM +0100, Michal Hocko wrote:
> > From: Michal Hocko
> >
> > 5a7862e83000 ("arm64: tlbflush: avoid flushing when fullmm == 1") has
> > introduced an optimization to not flush tlb when we are tearing the
> > whole addre
On Thu, Nov 23, 2017 at 10:02:36AM +0100, Michal Hocko wrote:
> From: Michal Hocko
>
> 5a7862e83000 ("arm64: tlbflush: avoid flushing when fullmm == 1") has
> introduced an optimization to not flush tlb when we are tearing the
> whole address space down. Will goes on to explain
>
> : Basically,
From: Michal Hocko
5a7862e83000 ("arm64: tlbflush: avoid flushing when fullmm == 1") has
introduced an optimization to not flush tlb when we are tearing the
whole address space down. Will goes on to explain
: Basically, we tag each address space with an ASID (PCID on x86) which
: is resident in
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