Just a quick one, since checking with HPA he seemed to indicate it was
worth reporting, I happened to notice a soft lockup on my system this
evening:

------------------------------------------------------
BUG: soft lockup - CPU#1 stuck for 11s! [imap:4394]

Pid: 4394, comm:                 imap
EIP: 0060:[<c04fabdb>] CPU: 1
EIP is at __copy_to_user_ll+0x2b/0xcf
 EFLAGS: 00000202    Not tainted  (2.6.23.15-137.fc8PAE #1)
EAX: 312d7475 EBX: 00000000 ECX: 0000063b EDX: 090a2c45
ESI: fff979c5 EDI: 09bf3938 EBP: e96f7eb4 DS: 007b ES: 007b FS: 00d8
CR0: 8005003b CR2: b9aa0eec CR3: 309cc000 CR4: 000006f0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
 [<c04634a2>] file_read_actor+0x6a/0xe0
 [<c0463be8>] do_generic_mapping_read+0x1b8/0x42a
 [<c04453d6>] tick_program_event+0x33/0x52
 [<c04653d6>] generic_file_aio_read+0x149/0x175
 [<c0463438>] file_read_actor+0x0/0xe0
 [<c04849a6>] do_sync_read+0xc7/0x10a
 [<c0487523>] cp_new_stat64+0xfc/0x10e
 [<c043e3f1>] autoremove_wake_function+0x0/0x35
 [<c045a26e>] audit_syscall_exit+0x2aa/0x2c6
 [<c04848df>] do_sync_read+0x0/0x10a
 [<c0485262>] vfs_read+0xa6/0x158
 [<c0485795>] sys_pread64+0x48/0x5f
 [<c040518a>] syscall_call+0x7/0xb
 =======================

------------------------------------

The system in question is a Fedora 6 base system running the Fedora 8
i386 PAE kernel.  Version information included in version.log.

The underlying hardware is an old ProLiant DL380 G2, it has a pair of
1.2Ghz PIII cpu's, 6GB of PC133 single-bit ECC memory (including
dmidecode as an attachment).

The imap process in question is dovecot-1.0.2-5.fc6.  Dovecot is
continuing without further issue.  No other lock-up has been seen.

If there's anything else that would be useful please let me know.

- John 'Warthog9' Hawley