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Date:      Mon, 12 Aug 2002 22:33:52 -0700
From:      Seth Hettich <sjh@whiskey.ucf.ics.uci.edu>
To:        current@freebsd.org
Subject:   bremfree: bp 0xc77938f4 not locked (Most recently used by kqueue)
Message-ID:  <200208130533.g7D5Xql13446@whiskey.ucf.ics.uci.edu>

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I get this all the time, and have for months now.  On two different 
systems (both updated to -current about 2 times per month), both
PCs (but with greatly differing HW).

What would be my first step to resolve this?  I sent in a PR, with
lots of notes, things I tried, and stack dumps.  I'm willing to do
some more work on it, if someone can point me in the right direction.

panic: bremfree: bp 0xc77938f4 not locked
panic messages:
---
panic: Most recently used by kqueue


syncing disks... panic: bremfree: bp 0xc77938f4 not locked
Uptime: 1d2h2m49s
Dumping 256 MB
ata0: resetting devices ..
done
 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
 ---
 #0  0xc02f9a9b in doadump ()

(kgdb) where
#0  0xc02f9a9b in doadump ()
#1  0xc02f9f7d in boot ()
#2  0xc02fa1a8 in panic ()
#3  0xc033a477 in bremfree ()
#4  0xc033cc60 in getblk ()
#5  0xc033a5aa in breadn ()
#6  0xc033a55c in bread ()
#7  0xc03fd2e6 in ffs_update ()
#8  0xc0411802 in ffs_fsync ()
#9  0xc040f18f in ffs_sync ()
#10 0xc034c358 in sync ()
#11 0xc02f9b9c in boot ()
#12 0xc02fa1a8 in panic ()
#13 0xc0434a9d in mtrash_ctor ()
#14 0xc0433527 in uma_zalloc_arg ()
#15 0xc02ee735 in malloc ()
#16 0xc02dd0e5 in fdcopy ()
#17 0xc02e5711 in fork1 ()
#18 0xc02e4c0a in fork ()
#19 0xc04657a1 in syscall ()
#20 0xc0455e5d in Xint0x80_syscall ()
---Can't read userspace from dump, or kernel process---


-Seth


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