[Dovecot] Strange dmesg messages

[Raphael Bittencourt S. Costa]

The problem still remains after I removed hdlm driver.

I've tested on Suse10 with kernel 2.6.16.21-0.8-smp x86_64 and
2.6.16.27-0.9-smp x86_64, with and without hdlm driver.  What kernel
version do you use on your suse servers? 
What is the impact on performance if I compile using --with-notify=none?
If I couldn't solve this, I'll problably try Debian.

Code: f0 ff 4d 20 0f 94 c0 31 db 84 c0 74 54 48 8b 5d 28 f0 ff 4b
RIP <ffffffff8019e43d>{sys_inotify_rm_watch+280} RSP <ffff810119a13f38>
CR2: 0000000000000020
 <1>Unable to handle kernel NULL pointer dereference at 0000000000000020
RIP:
<ffffffff8019e43d>{sys_inotify_rm_watch+280}
PGD 11a947067 PUD 11716f067 PMD 0
Oops: 0002 [127] SMP
last sysfs
file: /devices/pci0000:00/0000:00:1c.0/0000:04:00.0/0000:05:00.0/power/state
CPU 3
Modules linked in: ipv6 bonding button battery ac apparmor aamatch_pcre
ext3 jbd loop usbhid shpchp ide_cd cdrom hw_random pci_hotplug ehci_hcd
uhci_hcd bnx2 usbcore reiserfs dm_snapshot edd dm_mod fan thermal
processor lpfc scsi_transport_fc sg megaraid_sas piix sd_mod scsi_mod
ide_disk ide_core
Pid: 6753, comm: imap Not tainted 2.6.16.27-0.9-smp #1
RIP: 0010:[<ffffffff8019e43d>] <ffffffff8019e43d>{sys_inotify_rm_watch
+280}
RSP: 0018:ffff810119a13f38  EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff8101189a4af8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff810117d6f958
RBP: 0000000000000000 R08: 00000000000500fe R09: 0000000000027f70
R10: 0000000000000000 R11: 0000000000000206 R12: ffff8101189a4ac0
R13: ffff810117d6f958 R14: ffff810117d6f750 R15: ffff810119fd5c80
FS:  00002ad47d849ae0(0000) GS:ffff81012b00aa40(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000020 CR3: 0000000119d2d000 CR4: 00000000000006e0
Process imap (pid: 6753, threadinfo ffff810119a12000, task
ffff810129d8c0c0)
Stack: 000000012d6a86c0 ffffffff8017b6f3 00000000005e4ee0
00000000005db860
       00000000005e4e40 0000000000000000 00000000ffffffff
00000000005e4c90
       00007fff2d6b08d0 ffffffff8010a7be
Call Trace: <ffffffff8017b6f3>{sys_read+69}
<ffffffff8010a7be>{system_call+126}

Code: f0 ff 4d 20 0f 94 c0 31 db 84 c0 74 54 48 8b 5d 28 f0 ff 4b
RIP <ffffffff8019e43d>{sys_inotify_rm_watch+280} RSP <ffff810119a13f38>
CR2: 0000000000000020


On Fri, 2008-04-04 at 01:56 +0300, Uldis Pakuls wrote:

> Raphael Bittencourt S. Costa wrote:
> > I moved the maildir location from Hitachi's storage to local sas disk
> > and got the same erro using imaptest. Debug doesn't show any usable
> > information. :-(
> >
> > Any ideas? 
> >
> >   
> To trace your problem you need to debug kernel... as it is kernel level 
> crash.
> Try ask for help in kernel.org  newsgroups.
> 
> from your logs:
> Pid: 24319, comm: imap Tainted: P U 2.6.16.21-0.8-smp #1
> 
> this line means - kernel is "tainted": 
> P - A module with a Proprietary license has been loaded
> U - An Unsupported module has been loaded, i.e. a module which is not supported by Novell (SuSE specific flag)
> 
> [ see: https://secure-support.novell.com/KanisaPlatform/Publishing/250/3582750_f.SAL_Public.html ]
> 
> Try unload propertary and unsupported modules ; then run imaptest again.
> 
>