lkml.org 
[lkml]   [2014]   [Apr]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH] rtmutex: Do not prio boost when timeout is used
On Fri, Apr 25, 2014 at 04:28:48PM -0400, Steven Rostedt wrote:
> I've been discussing an issue on IRC with deadlock checking and found
> something wrong with it. Mainly, if any of the locks have a timeout,
> then even if the chain loops, there is no real deadlock. If one of the
> locks in the chain times out, then things will move forward again.


POSIX (opengroup):

http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_mutex_timedlock.html

Explicitly states that pthread_mutex_timedlock() should participate in
the PI chain, it also states that its perfectly valid for this function
to return -EDEADLK.

Therefore, there's nothing wrong. If this behaviour breaks userspace,
its already broken for not actually expecting the right thing.


\
 
 \ /
  Last update: 2014-04-26 13:21    [W:0.057 / U:0.812 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site