lkml.org 
[lkml]   [2011]   [Mar]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: excessive kworker activity when idle. (was Re: vma corruption in today's -git)
On Thu, Mar 31, 2011 at 8:03 AM, Dave Jones <davej@redhat.com> wrote:
> On Thu, Mar 31, 2011 at 10:58:50AM -0400, Dave Jones wrote:
>
> bah I missed a level. which seems to be the smoking gun.
> something in the tty layer seems to have gone nuts.

Ahhah. That is indeed the smoking gun.

I bet it's an old problem where something causes some stupid tty
ping-pong behaviour, and now it has become a high-CPU thing triggered
by commit f23eb2b2b285 ("tty: stop using "delayed_work" in the tty
layer").

Before that commit, if the tty layer got somehow confused, it would
always delay for a timer tick in between doing nothing. Now it will go
pretty much full blast. Which explains your CPU being hot.

Linus


\
 
 \ /
  Last update: 2011-03-31 17:29    [W:0.116 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site