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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I think we have seen this panic before. <span
style='mso-spacerun:yes'> </span>I am not sure if there was a fix then a
regression of sort.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am looking for a clue to help narrow this down. It seems a
<span class=SpellE>bvec</span>-><span class=SpellE>bv_page</span> is freed
and is being used later. <span style='mso-spacerun:yes'> </span>Here is the
panic message:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Tahoma><span style='font-size:
9.0pt;font-family:Tahoma;color:black'>Apr 21 05:05:53 <span class=SpellE>chogs</span>
kernel: CPU: 0<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: EIP: <span
class=GramE>0061:</span>[<ee2853c1>] Tainted: GF
VLI<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: EFLAGS: 00010296<span
class=GramE> (</span>2.6.16.38-xen #1)<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: EIP is at
_drbd_send_page+0x21/0x120 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: <span class=SpellE>eax</span>:
<span class=SpellE>ffffffff</span><span class=GramE> <span class=SpellE>ebx</span></span>:
c05958fc <span class=SpellE>ecx</span>: eb024000 <span
class=SpellE>edx</span>: 6b6b6b6b<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: <span class=SpellE>esi</span>:
6b6b6b6b<span class=GramE> <span class=SpellE>edi</span></span>:
a56b6b6b <span class=SpellE>ebp</span>: eb025eec <span
class=SpellE>esp</span>: eb025ebc<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: <span class=SpellE>ds</span>:
007b<span class=GramE> <span class=SpellE>es</span></span>: 007b <span
class=SpellE>ss</span>: 0069<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: Process drbd3_worker (<span
class=SpellE><span class=GramE>pid</span></span>: 5739, <span class=SpellE>threadinfo</span>=eb024000
task=ed440570)<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel: Stack:
<0>00001000 00004000 00000000 eb024000 00000020 ec64b26c <span
class=SpellE>ffffffff</span> 6b6b6b6b<br>
Apr 21 05:05:53 <span class=SpellE>chogs</span> kernel:
ec64b26c c05958fc 00000003 c7a5c6d0 eb025f08 ee2854f3 6b6b6b6b ec64b26c<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
eb025f30 00000000 ec64b26c eb025f5c ee285643 00000020 00008000 00000000<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel: Call Trace:<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
[<c0105a01>] show_stack_log_lvl+0xa1/0xe0<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
[<c0105bf1>] show_registers+0x181/0x200<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
[<c0105e10>] die+0x100/0x1b0<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel: [<c01168f6>]
do_page_fault+0x3c6/0x8c1<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
[<c010565f>] error_code+0x2b/0x30<br>
Apr 21 05:05:54 <span class=SpellE>chogs</span> kernel:
[<ee2854f3>] _drbd_send_zc_bio+0x33/0x50 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel:
[<ee285643>] drbd_send_dblock+0x133/0x1f0 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel:
[<ee2703da>] w_send_dblock+0x1a/0xe0 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel:
[<ee270e5e>] drbd_worker+0x2de/0x4b5 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel:
[<ee283f8c>] drbd_thread_setup+0x8c/0x100 [<span class=SpellE>drbd</span>]<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel:
[<c0103485>] kernel_thread_helper+0x5/0x10<br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel: Code: 5d f4 8b 7d <span
class=SpellE>fc</span> 89 <span class=SpellE>ec</span> 5d c3 90 55 89 e5 57 89 <span
class=SpellE>cf</span> b9 00 e0 ff <span class=SpellE>ff</span> 56 53 83 <span
class=SpellE>ec</span> 24 8b 75 08 89 45 f0 89 55 <span class=SpellE>ec</span>
21 e1 8b 41 18 89 45 e8 <8b> 02 f6 c4 40 74 03 8b 52 0c 8b 42 04 40 85 c0
7e 09 8b 55 <span class=SpellE>ec</span><br>
Apr 21 05:05:55 <span class=SpellE>chogs</span> kernel: <0><span
class=GramE>Fatal</span> exception: panic in 5 seconds<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Tahoma><span style='font-size:
9.0pt;font-family:Tahoma;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Tahoma><span style='font-size:
9.0pt;font-family:Tahoma;color:black'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Tahoma><span style='font-size:
9.0pt;font-family:Tahoma;color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Tahoma><span style='font-size:
9.0pt;font-family:Tahoma;color:black'>EM--</span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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