Date: Wed, 4 Apr 2001 22:41:27 +1000 (EST) From: Bruce Evans <bde@zeta.org.au> To: "Matthew H. North" <ctsmhn@cts.com> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: Reproducible kernel panics in ffs_valloc: dup_alloc Message-ID: <Pine.BSF.4.21.0104042236010.40022-100000@besplex.bde.org> In-Reply-To: <LAEKJNMMIOPFCDDPFBDECEBOCBAA.ctsmhn@cts.com>
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On Tue, 3 Apr 2001, Matthew H. North wrote:
> After spending hours trouble-shooting this and looking for similar problems
> and solutions in the bug archive, google, etc., I'm running out of ideas.
>
> I am responsible for maintaining a squid cache system for my company.
> Currently, the system is: PIII/800MHz, 768MB RAM (1GB cache), FreeBSD
> 4.2-STABLE, Squid-2.3STABLE4 (compiled locally instead of using the FreeBSD
> port). Boot drive and Squid cache drives are SCSI-LVD running at 80MB/s off
> of the Adaptec 29160N card. Softupdates are not enabled on *any* of the
> drives in this system.
>
> Unfortunately this system has been plagued by kernel panics for a number of
> weeks now. I originally assumed there was some sort of hardware problem,
> but I've since replaced every last piece of hardware: MB, RAM, CPU, SCSI
> card, SCSI cable, SCSI drives, video card, NICs. Every last piece of
> hardware has been replaced, yet the kernel panics persists on a fairly
> regular basis.
I wonder if the longstanding bugs in vfs_bio_clrbuf() could cause this
problem (rev.1.188 of vfs_bio.c fixed only some of the bugs). Quick fix:
Index: vfs_bio.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/vfs_bio.c,v
retrieving revision 1.273
diff -u -2 -r1.273 vfs_bio.c
--- vfs_bio.c 2001/02/28 04:13:07 1.273
+++ vfs_bio.c 2001/04/04 12:35:26
@@ -3088,5 +3088,5 @@
int i, mask = 0;
caddr_t sa, ea;
- if ((bp->b_flags & (B_VMIO | B_MALLOC)) == B_VMIO) {
+ if (0 || (bp->b_flags & (B_VMIO | B_MALLOC)) == B_VMIO) {
bp->b_flags &= ~B_INVAL;
bp->b_ioflags &= ~BIO_ERROR;
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