Date: Wed, 25 Nov 1998 07:59:41 -0500 (EST) From: "Alok K. Dhir" <adhir@worldbank.org> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: dg@root.com, grog@lemis.com, romanp@wuppy.rcs.ru, kpielorz@tdx.co.uk, current@FreeBSD.ORG Subject: Re: Random craches under heavy(?) disk activity Message-ID: <Pine.BSF.4.05.9811250756460.15140-100000@shadow.worldbank.org> In-Reply-To: <74A981D02E8D95E0852566C7000C14BE.000A4B1E852566C7@worldbank.org>
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I'm seeing the same thing also on a kernel as of 11/24. I set "sysctl -w
vfs.ffs.doreallocblks=0" and so far its stable.
On Tue, 24 Nov 1998, Steve Kargl wrote:
>
> According to David Greenman:
> >
> > Guys, would you please look at the file sys/kern/vfs_cluster.c and
> verify
> > that you have rev 1.74?
> >
>
> rm -rf /usr/sys
> cvsup at 981124.1614 pst
>
> It crashes. I have an ELF kernel with debugging symbols.
> I can not get a dump. If I issue 'panic' at the db> prompt
> the system locks up tight. No keyboard, no disk activity,
> nothing. All I have is a stack trace:
>
> dev=0x20404, bno = 34, bsize = 8192, size = 8192, fs = /var
> panic: ffs_blkfree: bad size
> mp_lock = 00000001; cpuid = 0; lapic.id = 01000000
> Debugger("panic")
> Stopped at _Debugger+0x35: movb $0, _in_Debugger.98
> db> trace
> _Debugger() at _Debugger+0x35
> _panic() at _panic+0x9f
> _ffs_blkfree() at _ffs_blkfree+0xc2
> _ffs_reallocblks() at _ffs_reallocblks+0x420
> _cluster_write() at _cluster_write+0x15f
> _ffs_write() at _ffs_write+0x56f
> _vn_write() at _vn_write+0xef
> _write() at _write+0xba
> _syscall() at _syscall+0x187
> _Xint0x80_syscall() at _Xint0x80_syscall+0x4c
>
> If someone can clue me in on getting a crash dump, I'll
> give Kirk access to my machines to debug this. I have
> dumpdev=/dev/da1s1b in my rc.conf, and da1s1b is nearly
> 700MB in size.
>
> --
> Steve
>
> finger kargl@troutmask.apl.washington.edu
> http://troutmask.apl.washington.edu/~clesceri/kargl.html
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-current" in the body of the message
>
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Alok K. Dhir Phone: +1.202.473.2446 oo \
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The World Bank Group Washington, DC \/
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