[lkml]   [2009]   [Jul]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch 2/2] sched: fix nr_uninterruptible accounting of frozen tasks really
On Fri, Jul 17, 2009 at 05:55:27PM +0200, Peter Zijlstra wrote:
> On Fri, 2009-07-17 at 08:51 -0700, Matt Helsley wrote:
> > So it's not clear to me how adding PF_FREEZING fixes anything. Am I
> > missing something?
> Yep, PF_FROZEN is only observed going into schedule(), on the way back
> out thaw_process() will already have cleared the flag.
> So we don't increment in deactivate_task(), but we do decrement in
> activate_task(), yielding for some very unbalanced accounting.

Ahhh, right!

OK, so the fix looks good then.

-Matt Helsley

 \ /
  Last update: 2009-07-17 18:23    [W:0.024 / U:5.364 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site