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<DIV><FONT color=#000000 size=3 face="Times New Roman">Hi
all,</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman">I'm encountering a lockup
problem many times when reading/writing large numbers of files. I cannot break
out of the race in gdb, a ps will lock up when it tries to read that process'
data, df (of course) locks up. No kill signals have any effect. Except 'pidstat
-p ALL' can get the pid, I could't do anything. The only way out of it is to
umount -f. </FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman">I am using gluster
<STRONG>3.2.6</STRONG> on <STRONG>CentOS 6.0</STRONG>
(2.6.32-71.el6.x86_64). </FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman">The problem is the same
as BUG 764964 (<A
href="https://bugzilla.redhat.com/show_bug.cgi?id=764964">https://bugzilla.redhat.com/show_bug.cgi?id=764964</A>).
and it is difficult to duplicate, I am find a way to produce it quickly. Any one
else also encountered this problem? How do you solve it?</FONT></DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman"></FONT> </DIV>
<DIV><FONT color=#000000 size=3 face="Times New Roman">Attached dmesg
log:</FONT></DIV>
<DIV><FONT face="Times New Roman">May 10 00:01:52 PPC-002 kernel: INFO: task
glusterfs:27888 blocked for more than 120 seconds.<BR>May 10 00:01:52 PPC-002
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.<BR>May 10 00:01:52 PPC-002 kernel:
glusterfs D
ffff88033fc24b00 0 27888 1
0x00000080<BR>May 10 00:01:52 PPC-002 kernel: ffff8806310fbe48 0000000000000086
0000000000000000 ffff8806310fbc58<BR>May 10 00:01:52 PPC-002 kernel:
ffff8806310fbdc8 0000000000020010 ffff8806310fbee8 00000001021f184a<BR>May 10
00:01:52 PPC-002 kernel: ffff8806311a0678 ffff8806310fbfd8 0000000000010518
ffff8806311a0678<BR>May 10 00:01:52 PPC-002 kernel: Call Trace:<BR>May 10
00:01:52 PPC-002 kernel: [<ffffffff814ca6b5>]
rwsem_down_failed_common+0x95/0x1d0<BR>May 10 00:01:52 PPC-002 kernel:
[<ffffffff814ca813>] rwsem_down_write_failed+0x23/0x30<BR>May 10 00:01:52
PPC-002 kernel: [<ffffffff81264253>]
call_rwsem_down_write_failed+0x13/0x20<BR>May 10 00:01:52 PPC-002 kernel:
[<ffffffff814c9d12>] ? down_write+0x32/0x40<BR>May 10 00:01:52 PPC-002
kernel: [<ffffffff8113b468>] sys_munmap+0x48/0x80<BR>May 10 00:01:52
PPC-002 kernel: [<ffffffff81013172>]
system_call_fastpath+0x16/0x1b</FONT></DIV>
<DIV><FONT face="Times New Roman"></FONT> </DIV>
<DIV><FONT face="Times New Roman">Thank you in advance.</FONT></DIV>
<DIV><FONT face="Times New Roman">Yaodong</FONT></DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2012-05-10</FONT></DIV><FONT size=2
face=Verdana>
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