Re: Lock order reversal

From: Lars Engels <lars.engels_at_0x20.net>
Date: Mon, 11 May 2009 19:00:51 +0200
On Mon, May 11, 2009 at 09:10:54AM -0500, Jon Loeliger wrote:
> 
> Folks,
> 
> Curious if anyone saw the lock order reversal in my
> post from yesterday?  Known issues?
> 
> There appear to be 3 cases, highlighted below:
> 
>  1st 0xc39e7a60 bufwait (bufwait) _at_ /usr/src/sys/kern/vfs_bio.c:2555
>  2nd 0xc3ffee00 dirhash (dirhash) _at_ /usr/src/sys/ufs/ufs/ufs_dirhash.c:275
> 
>  1st 0xc4224164 ufs (ufs) _at_ /usr/src/sys/kern/vfs_mount.c:1050
>  2nd 0xc4224df4 devfs (devfs) _at_ /usr/src/sys/kern/vfs_subr.c:2101
> 
>  1st 0xc44edc2c filedesc structure (filedesc structure) _at_ /usr/src/sys/kern/kern_descrip.c:1076
>  2nd 0xc4a9737c ufs (ufs) _at_ /usr/src/sys/kern/vfs_subr.c:4109
> 
> Thanks,
> jdl

Hi Jon,

all three LORs are well known and listed here:
http://sources.zabbadoz.net/freebsd/lor.html

Cheers

Lars
Received on Mon May 11 2009 - 15:16:51 UTC

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