Date: Thu, 22 Jan 2004 00:10:17 -0500 From: Ken Smith <kensmith@cse.Buffalo.EDU> To: Kris Kennaway <kris@obsecurity.org> Cc: current@freebsd.org Subject: Re: Strange behaviour Message-ID: <20040122051017.GA11853@electra.cse.Buffalo.EDU> In-Reply-To: <20040121184307.GA41138@xor.obsecurity.org> References: <EE3D3FBAFFCAED448C21C398FDAD91AC0108DE@EBE1.gc.nat> <20040121182730.GB40652@xor.obsecurity.org> <20040121183959.GA25589@electra.cse.Buffalo.EDU> <20040121184307.GA41138@xor.obsecurity.org>
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On Wed, Jan 21, 2004 at 10:43:07AM -0800, Kris Kennaway wrote:
> OK, sounds like it might be something to do with vnode locking.
> Turning on DEBUG_VFS_LOCKS might help to find it.
I turned that on but it doesn't seem to have given any more clues.
The machine is (recently...) attached to a serial console, no extra
messages. At the time I did it the only net traffic would have
been my login session (watching with top) so odds are it's just
the disk I/O causing it.
Amongst other things I've got:
# Debugging for use in -current
options DDB #Enable the kernel debugger
options INVARIANTS #Enable calls of extra sanity checking
options INVARIANT_SUPPORT #Extra sanity checks of internal structures, required by INVARIANTS
options WITNESS #Enable checks to detect deadlocks and cycles
#options WITNESS_SKIPSPIN #Don't run witness on spinlocks for speed
options DEBUG_VFS_LOCKS
Otherwise it's a more or less GENERIC config file. As an earlier
attempt I did try turning off acpi with this in /boot/loader.conf:
hint.acpi.0.disabled="1"
The machine is up and running right now with several wedged find
processes:
perseus 13 % ps alxww | grep find
0 1425 1 69 -4 0 1316 836 getblk D p0- 0:13.09 find / -name
foo -print
0 1426 1 115 -4 0 1316 836 ufs D p0- 0:11.74 find / -name
foo -print
0 1427 1 105 -4 0 1316 836 ufs D p0- 0:11.77 find / -name
foo -print
0 1428 1 112 -4 0 1316 836 getblk D p0- 0:11.54 find / -name
foo -print
0 1429 1 89 -4 0 1316 836 getblk D p0- 0:11.22 find / -name
foo -print
perseus 14 %
Given the DDB config info above is there anything I can do to give you
more information?
--
Ken Smith
- From there to here, from here to | kensmith@cse.buffalo.edu
there, funny things are everywhere. |
- Theodore Geisel |
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