Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 31 Mar 2011 08:25:36 -0700 | Subject | Re: excessive kworker activity when idle. (was Re: vma corruption in today's -git) |
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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
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