lkml.org 
[lkml]   [2012]   [Nov]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: tty, vt: lockdep warnings
On Tue, Nov 06, 2012 at 04:11:00PM +0000, Alan Cox wrote:

> > But a deadlock we have lived with for years. Without reverting,
> > we're prevented from discovering all the new deadlocks we're adding.
>
> We lived with it locking boxes up on users but not knowing why.

Circa 3.5 we got a lot more reports of this happening too for some reason.
Turns out that races are awfully resistant to bisecting too.

> The root
> cause is loading two different framebuffers with one taking over from
> another - that should be an obscure corner case and once the fuzz testing
> can avoid.
>
> I had a semi-informed poke at this and came up with a possible patch (not very tested)

If this fixes the real problems we've been seeing, I'll dance a jig.

Dave



\
 
 \ /
  Last update: 2012-11-06 18:24    [W:0.102 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site