deadlock in -current

[Kris Kennaway]

On Mon, Sep 26, 2005 at 10:02:03AM +0100, Robert Watson wrote:
> 
> On Sun, 25 Sep 2005, Kris Kennaway wrote:
> 
> >On Fri, Sep 23, 2005 at 11:43:22PM -0400, Kris Kennaway wrote:
> >>Since updating my (UP i386) machines yesterday they're all hanging
> >>after a few hours of load with all processes in the following states:
> >>
> >>db> ps
> >>  pid   proc     uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
> >>28397 c5267a3c    0 28396 28397 0000110 [SLPQ vmmaps 0xc1027178][SLP] cron
> >>28396 c5267c48    0   386   386 0000000 [SLPQ ppwait 0xc5267c48][SLP] cron
> >
> >[...]
> >
> >This is still broken.  Someone must have broken this in the past few 
> >days, but I don't have time right now to do a binary search.  Please, 
> >everyone review your recent commits to see if you could be the 
> >originator.
> 
> You could try backing this out locally:
> 
>   1.127     +16 -3     src/sys/fs/fifofs/fifo_vnops.c
> 
> But I'm pretty sure it's not the source of the problem you've been seeing.
> 
> If you were using process accounting, it could be the recent kern_acct.c 
> change to convert NULL's to curthread's (even more unlikely), but I'm 
> pretty sure you're not running process accounting.

Correct.  I'll try backing out that commit.

Kris
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