Re: vfs_bio panic

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Sat, Jun 14, 2008 at 01:55:51PM +0100, Chris Gilbert wrote:
> Manuel Bouyer wrote:
> > Hi,
> > I got on
> > NetBSD 4.99.64 (XEN3_DOM0) #192: Sat Jun  7 21:59:08 CEST 2008
> >  
> > bouyer@rock:/dsk/l1/misc/bouyer/tmp/amd64/obj/dsk/l1/misc/bouyer/current/src/sys/arch/amd64/compile/XEN3_DOM0
> > 
> > this panic:
> > panic: kernel diagnostic assertion "!ISSET(bp->b_cflags, BC_BUSY)" failed: 
> > file "/dsk/l1/misc/bouyer/current/src/sys/kern/vfs_bio.c", line 1313
> > fatal breakpoint trap in supervisor mode
> > trap type 1 code 0 rip ffffffff804abd7d cs e030 rflags 246 cr2  
> > 7f7ffdfec000 cpl 0 rsp ffffa0000cfdb8f0
> > Stopped in pid 0.37 (system) at netbsd:breakpoint+0x5:  leave
> > breakpoint() at netbsd:breakpoint+0x5
> > panic() at netbsd:panic+0x255
> > __kernassert() at netbsd:__kernassert+0x2d
> > getnewbuf() at netbsd:getnewbuf+0x2b0
> > getblk() at netbsd:getblk+0x91
> > ffs_getblk() at netbsd:ffs_getblk+0x4f
> > ffs_sbupdate() at netbsd:ffs_sbupdate+0x54
> > ffs_cgupdate() at netbsd:ffs_cgupdate+0x21
> > ffs_sync() at netbsd:ffs_sync+0x345
> > sync_fsync() at netbsd:sync_fsync+0x76
> > VOP_FSYNC() at netbsd:VOP_FSYNC+0x34
> > sched_sync() at netbsd:sched_sync+0x14d
> > 
> > Does it ring a bell for someone ? May it be fixed in more recent sources ?
> > 
> 
> Is this an MP system?

No

> 
> do you have any processes in biowait (possibly one in biolock and some
> in tstile)?  I'm wondering if it's a different symptom of an MP condvar
> issue that I think I might have got to the bottom of.  It was causing
> fun in biowait & biodone interaction.

I don't know, I didn't issue a ps after the panic ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--