[lkml]   [2004]   [Aug]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [patch] voluntary-preempt-
Ingo Molnar wrote :
> * Ingo Molnar <> wrote:
> > > Yes, Ingo identified an issue with copy_page_range, I don't think it's
> > > fixed yet. See the voluntary-preempt- thread.
> >
> > right, it's not fixed yet. It's not a trivial critical section - we
> > are holding two locks and are mapping two atomic kmaps.
> fortunately it's easier than i thought - neither the source pmd nor the
> target pmd can go away so we can simply drop the locks, reschedule, and
> remap. Does the patch below (ontop of -P3) fix the copy_page_range()
> latencies you are seeing?
> Ingo

Ooops, sorry about my previous post, I had missed this one. It fixes the
problem, thanks.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:05    [W:0.226 / U:0.460 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site