Messages in this thread | | | Date | Wed, 1 Apr 2020 12:18:10 -0400 | From | Daniel Jordan <> | Subject | Re: [PATCH v3] mm: fix tick timer stall during deferred page init |
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On Wed, Apr 01, 2020 at 06:12:43PM +0200, Michal Hocko wrote: > On Wed 01-04-20 12:09:29, Daniel Jordan wrote: > > On Wed, Apr 01, 2020 at 06:00:48PM +0200, Michal Hocko wrote: > > > On Wed 01-04-20 17:50:22, David Hildenbrand wrote: > > > > On 01.04.20 17:42, Michal Hocko wrote: > > > > > This needs a double checking but I strongly believe that the lock can be > > > > > simply dropped in this path. > > > > This is what my fix does, it limits the time the resize lock is held. > > Just remove it from the deferred intialization and add a comment that we > deliberately not taking the lock here because abc
I think it has to be a little more involved because of the window where interrupts might allocate during deferred init, as Vlastimil pointed out a few years ago when the change was made. I'll explain myself in the changelog.
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