lkml.org 
[lkml]   [2011]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/4] allow freezing of tasks with netfs calls in flight
Hi!

> We've had a number of reports recently of people with NFS and CIFS
> mounts that were unable to suspend or hibernate their machines. Here
> are a couple of Fedora bugs that illustrate the problem:
>
> https://bugzilla.redhat.com/show_bug.cgi?id=712088
> https://bugzilla.redhat.com/show_bug.cgi?id=717735
>
> When it occurs the problem is pretty clear. We have a task that's
> sleeping in the kernel in TASK_KILLABLE sleep, generally waiting
> for a reply to come in. Often though, userspace has already taken
> down the interface so that reply will never come. The process then
> fails to freeze and the suspend fails.

Userspace should not take interface down for suspend (*). Why do that?


> This patch fixes this by allowing the TASK_KILLABLE sleeps in NFS and
> CIFS to be awoken by the freezer and then to try to freeze. If a freeze
> event does occur, then the code will treat it as if a schedule() has
> already occured.

Looks like good idea...

(*) unless absolutely neccessary. openvpn?

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


\
 
 \ /
  Last update: 2011-10-11 08:21    [W:1.289 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site