Buffer error in fs/buffer.c

Hi all,

I got a strange error in my logs this afternoon. I was upgrading to 2.6.1 as
usual: mount /boot, copied the bzImage over (from reiserfs to ext3), called 'sync'... and sync froze. The system is still usable (I'm writing this e-mail now on it), but sync has yet to recover. The system has otherwise been very stable, both in 2.6.0 and in XP. I'll attach the call trace and my lspci to the bottom; also, preemption is on. Let me know if there is anything else I can provide. I'm not subscribed to linux-kernel, so please cc: me to any replies.

---- Call trace ----

EXT3 FS on sdb1, internal journal
EXT3-fs: mounted filesystem with ordered data mode. buffer layer error at fs/buffer.c:1818

Call Trace:
 [<c0152ede>] __block_write_full_page+0x22a/0x3e6
 [<c0154647>] block_write_full_page+0xd8/0x101
 [<c015711d>] blkdev_get_block+0x0/0x5a
 [<c015727d>] blkdev_writepage+0x1f/0x23
 [<c015711d>] blkdev_get_block+0x0/0x5a
 [<c017044a>] mpage_writepages+0x217/0x2f1
 [<c015725e>] blkdev_writepage+0x0/0x23
 [<c015840d>] generic_writepages+0x1f/0x23
 [<c013a55e>] do_writepages+0x1e/0x38
 [<c0134e7e>] __filemap_fdatawrite+0xe3/0xec
 [<c0134e9e>] filemap_fdatawrite+0x17/0x1b
 [<c0151436>] sync_blockdev+0x26/0x4c
 [<c016f2e0>] sync_inodes+0x86/0x90
 [<c0151593>] do_sync+0x44/0x64
 [<c01515c2>] sys_sync+0xf/0x15
 [<c010915b>] syscall_call+0x7/0xb

buffer layer error at fs/buffer.c:2664

Call Trace:
 [<c0154814>] submit_bh+0x126/0x176
 [<c0152eb6>] __block_write_full_page+0x202/0x3e6
 [<c0154647>] block_write_full_page+0xd8/0x101
 [<c015711d>] blkdev_get_block+0x0/0x5a
 [<c015727d>] blkdev_writepage+0x1f/0x23
 [<c015711d>] blkdev_get_block+0x0/0x5a
 [<c017044a>] mpage_writepages+0x217/0x2f1
 [<c015725e>] blkdev_writepage+0x0/0x23
 [<c015840d>] generic_writepages+0x1f/0x23
 [<c013a55e>] do_writepages+0x1e/0x38
 [<c0134e7e>] __filemap_fdatawrite+0xe3/0xec
 [<c0134e9e>] filemap_fdatawrite+0x17/0x1b
 [<c0151436>] sync_blockdev+0x26/0x4c
 [<c016f2e0>] sync_inodes+0x86/0x90
 [<c0151593>] do_sync+0x44/0x64
 [<c01515c2>] sys_sync+0xf/0x15
 [<c010915b>] syscall_call+0x7/0xb

---- End Call trace ----

---- lcpi ----
00:00.0 Host bridge: Intel Corp. 82875P Memory Controller Hub (rev 02) 00:01.0 PCI bridge: Intel Corp. 82875P Processor to AGP Controller (rev 02) 00:03.0 PCI bridge: Intel Corp. 82875P Processor to PCI to CSA Bridge (rev 02) 00:1d.0 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.1 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.2 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.3 USB Controller: Intel Corp. 82801EB USB (rev 02)
00:1d.7 USB Controller: Intel Corp. 82801EB USB2 (rev 02)
00:1e.0 PCI bridge: Intel Corp. 82801BA/CA/DB/EB PCI Bridge (rev c2) 00:1f.0 ISA bridge: Intel Corp. 82801EB LPC Interface Controller (rev 02) 00:1f.1 IDE interface: Intel Corp. 82801EB Ultra ATA Storage Controller (rev
02)
00:1f.3 SMBus: Intel Corp. 82801EB SMBus Controller (rev 02) 00:1f.5 Multimedia audio controller: Intel Corp. 82801EB AC'97 Audio Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation NV25 [GeForce4 Ti 4600] (rev a2)
02:01.0 Ethernet controller: Intel Corp.: Unknown device 1019 03:03.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80)
03:0a.0 SCSI storage controller: Adaptec AHA-2940U2/U2W
03:0d.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 04) 03:0d.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev
01)
---- lspci ----

Best regards,

Michael C. Ferguson