Re: [PATCH] Fix tasks being forgotten for a long time on SMP

2016-09-23 Thread Peter Zijlstra
On Thu, Sep 22, 2016 at 12:06:03PM -0700, Yuriy Romanenko wrote: > Hello, > > I just spent three hours studying TOT scheduler code, and I am leaning > towards that this patch being no longer relevant (or being never > relevant, really). > If it ever fixed a real issue, I think it fixed it incorrec

Re: [PATCH] Fix tasks being forgotten for a long time on SMP

2016-09-22 Thread Yuriy Romanenko
Hello, I just spent three hours studying TOT scheduler code, and I am leaning towards that this patch being no longer relevant (or being never relevant, really). If it ever fixed a real issue, I think it fixed it incorrectly. However, I would love to understand what exactly we were seeing and why

Re: [PATCH] Fix tasks being forgotten for a long time on SMP

2016-09-22 Thread Peter Zijlstra
On Tue, Sep 20, 2016 at 06:14:34PM -0700, Yuriy Romanenko wrote: > From e9a304ae91fa2a4427bde7d3aea18296d0ebb27f Mon Sep 17 00:00:00 2001 > From: Yuriy Romanenko > Date: Tue, 20 Sep 2016 17:47:28 -0700 > Subject: [PATCH] Fix tasks being forgotten for a long time on SMP > > Observed occasional ver