lkml.org 
[lkml]   [2008]   [Oct]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.28-rc2-mm1: possible circular locking
On Wed, 29 Oct 2008 13:58:40 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:

> We've been calling schedule_on_each_cpu() from within
> lru_add_drain_all() for ages. What changed to cause all this
> to start happening?

what started to get these out of the weed is that copy_*_user() is now
annotated to (potentially) take the mmap sem (which it does if there's
a fault)...
previously you had to actually fault to get the lock dependency noticed.

--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit atty://www.lesswatts.org


\
 
 \ /
  Last update: 2008-10-29 22:57    [W:0.084 / U:0.720 seconds]
©2003-2014 Jasper Spaans. Advertise on this site