Date: Wed, 28 Nov 2001 14:33:29 -0800 (PST) From: Paul Herman <pherman@frenchfries.net> To: FreeBSD Alpha <freebsd-alpha@FreeBSD.ORG> Message-ID: <200111282233.fASMXUA01849@tick.sc.omation.com>
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Hi,
My 4.4-RELEASE (alpha) paniced 4 times in a row today and all at
the same place. I don't know what to make of it, so I thought I'd
start here.
It happens when I do a lot of NFS traffic (like "pkg_add
/nfs/mount/package.tgz") What is XentUna? Is that a trap for
unaligned access? If so, what does fxdr_unsigned() do, and why
would XentUna fail? Or does it not try to correct it? I do have
machdep.unaligned_fix=1 if that makes a difference.
Regards,
-Paul.
tick# gdb -k /kernel.debug /var/crash/vmcore.4
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "alpha-unknown-freebsd"...
panic: trap
#0 0xfffffc00003a9d40 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:472
472 savectx(&dumppcb);
(kgdb) bt
#0 0xfffffc00003a9d40 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:472
#1 0xfffffc00003a9908 in boot (howto=256)
at /usr/src/sys/kern/kern_shutdown.c:313
#2 0xfffffc00003aa150 in panic (fmt=0xfffffc00005d284c "trap")
at /usr/src/sys/kern/kern_shutdown.c:581
#3 0xfffffc0000559560 in trap (a0=18446741874698165282, a1=8192, a2=0,
entry=4, framep=0xfffffe0012a1f9a0) at /usr/src/sys/alpha/alpha/trap.c:551
#4 0xfffffc000054b724 in XentUna ()
#5 0xfffffc00004b45bc in nfs_readrpc (vp=0xfffffe0012b11a80,
uiop=0xfffffe0012a1fbd0, cred=0xfffffe0001468b80)
at /usr/src/sys/nfs/nfs_vnops.c:1114
(kgdb) up 5
#5 0xfffffc00004b45bc in nfs_readrpc (vp=0xfffffe0012b11a80,
uiop=0xfffffe0012a1fbd0, cred=0xfffffe0001468b80)
at /usr/src/sys/nfs/nfs_vnops.c:1114
1114 eof = fxdr_unsigned(int, *(tl + 1));
(kgdb) list
1109 if (error) {
1110 m_freem(mrep);
1111 goto nfsmout;
1112 }
1113 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
1114 eof = fxdr_unsigned(int, *(tl + 1));
1115 } else
1116 nfsm_loadattr(vp, (struct vattr *)0);
1117 nfsm_strsiz(retlen, nmp->nm_rsize);
1118 nfsm_mtouio(uiop, retlen);
(kgdb) print tl
$1 = (u_int32_t *) 0xfffffe0000b51c22
(kgdb) print tl+1
$2 = (u_int32_t *) 0xfffffe0000b51c26
(kgdb) print *(tl+1)
$3 = 379828717
(kgdb) quit
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