Ext4 Kernel Crash

[Nanakos Chrysostomos]

Dear Linux Kernel Developers,
I am writing to report a kernel or ext4 bug.
I have two servers populated with 2 LUNs from the main storage facility,
each server has one LUN which is about 1.2TB. On top of that I am
utilizing glusterfs and samba to mount the 2.4TB created space to a
Windows server and other Linux machines (via glusterfs native client). 
Yesterday I tried to copy to the new storage glusterfs space about 788GB 
and in the morning I got from both machines the attached kernel messages.
I have to mention that the first machine runs samba and mounts the
allocated glusterfs space with the help of FUSE glusterfs driver. The
second machine doesn't mount/export anything and simply runs the glusterfs
service.
I have to also add that similar problems have happened to another system
which is used as a TIF to JP2 converter. The conversion path starts from
the conversion of a pdf file to png and then to jp2. As you can imagine
this process produces hundreds of thousands of files. Similarly the
machine crashes and I get similar kernel messages concerning ext4. I can't
give you more information on that because the machine crashes, I have to
take a photo and send it back to you next time.
What do you believe about the kernel messages? Is this a ext4 bug when
thousands of files are created? How can I help resolve that?

Please Cc me because I am not in the list.

With kind regards,
Chris.


PS: Are there any ext4 kernel optimization's for avoiding that or
narrowing down the problem if this is not so obvious?

"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  2070      1 0x00000000
 ffff88003daa5c68 0000000000000082 0000000000000000 000000010000000b
 ffff88003daa5d18 ffff88003daa5c98 ffff88003daa5bf8 ffffffff81090957
 ffff88003a912638 ffff88003daa5fd8 000000000000f4e8 ffff88003a912638
Call Trace:
 [<ffffffff81090957>] ? bit_waitqueue+0x17/0xd0
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa013293b>] ? __ext4_handle_dirty_metadata+0x7b/0x100 [ext4]
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa0114fb9>] ext4_orphan_add+0xb9/0x1f0 [ext4]
 [<ffffffffa01146b9>] ? ext4_delete_entry+0xf9/0x110 [ext4]
 [<ffffffffa0116a8b>] ext4_unlink+0x29b/0x2b0 [ext4]
 [<ffffffff81183edf>] vfs_unlink+0x9f/0xe0
 [<ffffffff81182c2a>] ? lookup_hash+0x3a/0x50
 [<ffffffff81186463>] do_unlinkat+0x183/0x1c0
 [<ffffffff81183601>] ? path_put+0x31/0x40
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff811864b6>] sys_unlink+0x16/0x20
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:2322 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  2322      1 0x00000000
 ffff88003c70dc48 0000000000000082 0000000000000000 00000001810949db
 0000000000000000 0000000000000000 ffff88003c70dcb0 0000000000000000
 ffff88003b18baf8 ffff88003c70dfd8 000000000000f4e8 ffff88003b18baf8
Call Trace:
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2585 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000000     0  2585   1998 0x00000000
 ffff88003b299bb8 0000000000000082 000000000000007a 0000000000000286
 ffff88003b23b8c0 000000000000007e ffff88003b299b98 ffff88003b23b8c0
 ffff88003a913ab8 ffff88003b299fd8 000000000000f4e8 ffff88003a913ab8
Call Trace:
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff8118d11f>] ? d_free+0x3f/0x60
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2586 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000000     0  2586   1998 0x00000000
 ffff88003b1e7bb8 0000000000000082 0000000000000088 0000000000000286
 ffff88003b619380 000000000000008c ffff88003b1e7b98 ffff88003b619380
 ffff880037a59af8 ffff88003b1e7fd8 000000000000f4e8 ffff880037a59af8
Call Trace:
 [<ffffffff8141ccde>] ? release_sock+0xce/0xe0
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2587 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000001     0  2587   1998 0x00000000
 ffff88003d5efbb8 0000000000000086 0000000000000000 0000000000000286
 ffff880037047cc0 000000000000007e ffff88003d5efb98 ffff880037047cc0
 ffff88003b04f038 ffff88003d5effd8 000000000000f4e8 ffff88003b04f038
Call Trace:
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2588 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000001     0  2588   1998 0x00000000
 ffff88003b093bb8 0000000000000082 0000000000000000 0000000000000286
 ffff88003a9e69c0 000000000000007e ffff88003b093b98 ffff88003a9e69c0
 ffff8800376f9b38 ffff88003b093fd8 000000000000f4e8 ffff8800376f9b38
Call Trace:
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2589 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000001     0  2589   1998 0x00000000
 ffff8800374c1bb8 0000000000000086 0000000000000088 0000000000000286
 ffff880037bf50c0 000000000000008c ffff8800374c1b98 ffff880037bf50c0
 ffff88003b18a678 ffff8800374c1fd8 000000000000f4e8 ffff88003b18a678
Call Trace:
 [<ffffffff8141ccde>] ? release_sock+0xce/0xe0
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:2322 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000001     0  2322      1 0x00000000
 ffff88003c70da28 0000000000000082 ffff880000020f58 ffff88003b8615a8
 ffff88003c70d9a8 ffffffff81467515 ffff88003b8615a8 ffff88003b8615a8
 ffff88003b18baf8 ffff88003c70dfd8 000000000000f4e8 ffff88003b18baf8
Call Trace:
 [<ffffffff81467515>] ? ip_local_out+0x25/0x30
 [<ffffffff81090d7e>] ? prepare_to_wait+0x4e/0x80
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa0141ccd>] ? ext4_init_security+0x2d/0x296 [ext4]
 [<ffffffffa012d73e>] ext4_ext_tree_init+0x3e/0x60 [ext4]
 [<ffffffffa010a500>] ext4_new_inode+0x1150/0x1190 [ext4]
 [<ffffffffa0117c90>] ext4_create+0xc0/0x150 [ext4]
 [<ffffffff811822a3>] ? generic_permission+0x23/0xb0
 [<ffffffff81183c84>] vfs_create+0xb4/0xe0
 [<ffffffff8118788f>] do_filp_open+0xb2f/0xd60
 [<ffffffff81193482>] ? alloc_fd+0x92/0x160
 [<ffffffff81173a49>] do_sys_open+0x69/0x140
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff81173b60>] sys_open+0x20/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2614 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000001     0  2614   1998 0x00000000
 ffff88003c63dbb8 0000000000000086 0000000000000000 0000000000000286
 ffff88003b6014c0 000000000000007c ffff88003c63db98 ffff88003b6014c0
 ffff88003a913ab8 ffff88003c63dfd8 000000000000f4e8 ffff88003a913ab8
Call Trace:
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff8118e957>] ? __d_lookup+0xa7/0x150
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task smbd:2615 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
smbd          D 0000000000000001     0  2615   1998 0x00000000
 ffff88003d9bbbb8 0000000000000086 0000000000000000 0000000000000286
 ffff88003720f580 000000000000008a ffff88003d9bbb98 ffff88003720f580
 ffff880037a59af8 ffff88003d9bbfd8 000000000000f4e8 ffff880037a59af8
Call Trace:
 [<ffffffff814ee01e>] __mutex_lock_slowpath+0x13e/0x180
 [<ffffffff814edebb>] mutex_lock+0x2b/0x50
 [<ffffffff811848af>] do_lookup+0xef/0x1e0
 [<ffffffff811851d4>] __link_path_walk+0x734/0x1030
 [<ffffffff81183795>] ? path_to_nameidata+0x45/0x60
 [<ffffffff81185d5a>] path_walk+0x6a/0xe0
 [<ffffffff81185f2b>] do_path_lookup+0x5b/0xa0
 [<ffffffff81186b97>] user_path_at+0x57/0xa0
 [<ffffffff81042c24>] ? __do_page_fault+0x1e4/0x480
 [<ffffffff81182fc5>] ? putname+0x35/0x50
 [<ffffffff81186ba2>] ? user_path_at+0x62/0xa0
 [<ffffffff8117b786>] vfs_fstatat+0x46/0x80
 [<ffffffff81195630>] ? mntput_no_expire+0x30/0x110
 [<ffffffff8117b8eb>] vfs_stat+0x1b/0x20
 [<ffffffff8117b914>] sys_newstat+0x24/0x50
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
[root@gluster00 ~]#


[root@gluster00 ~]# mount
/dev/sda3 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/sdb1 on /GLUSTER00 type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
gluster00:/mm-volume on /mmvolume type fuse.glusterfs (rw,allow_other,default_permissions,max_read=131072)

[root@gluster00 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              18G  2.0G   15G  13% /
tmpfs                 499M     0  499M   0% /dev/shm
/dev/sda1             248M  103M  133M  44% /boot
/dev/sdb1             960G  200M  911G   1% /GLUSTER00
gluster00:/mm-volume  2.4T  397M  2.2T   1% /mmvolume


[root@gluster00 ~]# gluster -V
glusterfs 3.2.5 built on Dec  7 2011 18:41:39
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.

[root@gluster00 ~]# uname -a
Linux gluster00.prod 2.6.32-220.4.1.el6.x86_64 #1 SMP Tue Jan 24 02:13:44 GMT 2012 x86_64 x86_64 x86_64 GNU/Linux

[root@gluster00 ~]# smbd -V
Version 3.5.10-114.el6


THE MACHINE RUNS CENTOS 6.2

INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c68 0000000000000086 0000000000000000 000000010000000b
 ffff88003b683d18 ffff88003b683c98 ffff88003b683bf8 ffffffff81090957
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffff81090957>] ? bit_waitqueue+0x17/0xd0
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa013293b>] ? __ext4_handle_dirty_metadata+0x7b/0x100 [ext4]
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa0114fb9>] ext4_orphan_add+0xb9/0x1f0 [ext4]
 [<ffffffffa01146b9>] ? ext4_delete_entry+0xf9/0x110 [ext4]
 [<ffffffffa0116a8b>] ext4_unlink+0x29b/0x2b0 [ext4]
 [<ffffffff81183edf>] vfs_unlink+0x9f/0xe0
 [<ffffffff81182c2a>] ? lookup_hash+0x3a/0x50
 [<ffffffff81186463>] do_unlinkat+0x183/0x1c0
 [<ffffffff81183601>] ? path_put+0x31/0x40
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff811864b6>] sys_unlink+0x16/0x20
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c68 0000000000000086 0000000000000000 000000010000000b
 ffff88003b683d18 ffff88003b683c98 ffff88003b683bf8 ffffffff81090957
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffff81090957>] ? bit_waitqueue+0x17/0xd0
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa013293b>] ? __ext4_handle_dirty_metadata+0x7b/0x100 [ext4]
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa0114fb9>] ext4_orphan_add+0xb9/0x1f0 [ext4]
 [<ffffffffa01146b9>] ? ext4_delete_entry+0xf9/0x110 [ext4]
 [<ffffffffa0116a8b>] ext4_unlink+0x29b/0x2b0 [ext4]
 [<ffffffff81183edf>] vfs_unlink+0x9f/0xe0
 [<ffffffff81182c2a>] ? lookup_hash+0x3a/0x50
 [<ffffffff81186463>] do_unlinkat+0x183/0x1c0
 [<ffffffff81183601>] ? path_put+0x31/0x40
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff811864b6>] sys_unlink+0x16/0x20
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c68 0000000000000086 0000000000000000 000000010000000b
 ffff88003b683d18 ffff88003b683c98 ffff88003b683bf8 ffffffff81090957
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffff81090957>] ? bit_waitqueue+0x17/0xd0
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa013293b>] ? __ext4_handle_dirty_metadata+0x7b/0x100 [ext4]
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa0114fb9>] ext4_orphan_add+0xb9/0x1f0 [ext4]
 [<ffffffffa01146b9>] ? ext4_delete_entry+0xf9/0x110 [ext4]
 [<ffffffffa0116a8b>] ext4_unlink+0x29b/0x2b0 [ext4]
 [<ffffffff81183edf>] vfs_unlink+0x9f/0xe0
 [<ffffffff81182c2a>] ? lookup_hash+0x3a/0x50
 [<ffffffff81186463>] do_unlinkat+0x183/0x1c0
 [<ffffffff81183601>] ? path_put+0x31/0x40
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff811864b6>] sys_unlink+0x16/0x20
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c68 0000000000000086 0000000000000000 000000010000000b
 ffff88003b683d18 ffff88003b683c98 ffff88003b683bf8 ffffffff81090957
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffff81090957>] ? bit_waitqueue+0x17/0xd0
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa013293b>] ? __ext4_handle_dirty_metadata+0x7b/0x100 [ext4]
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa0114fb9>] ext4_orphan_add+0xb9/0x1f0 [ext4]
 [<ffffffffa01146b9>] ? ext4_delete_entry+0xf9/0x110 [ext4]
 [<ffffffffa0116a8b>] ext4_unlink+0x29b/0x2b0 [ext4]
 [<ffffffff81183edf>] vfs_unlink+0x9f/0xe0
 [<ffffffff81182c2a>] ? lookup_hash+0x3a/0x50
 [<ffffffff81186463>] do_unlinkat+0x183/0x1c0
 [<ffffffff81183601>] ? path_put+0x31/0x40
 [<ffffffff8119ad11>] ? sys_lgetxattr+0x61/0x80
 [<ffffffff811864b6>] sys_unlink+0x16/0x20
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1754 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1754      1 0x00000000
 ffff88003b479c48 0000000000000086 ffff880000000001 000000013712d580
 0000000000000000 ffff88003f810080 ffff88003faacc00 ffff88003f8224c0
 ffff88003712db38 ffff88003b479fd8 000000000000f4e8 ffff88003712db38
Call Trace:
 [<ffffffff81090d7e>] ? prepare_to_wait+0x4e/0x80
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1754 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1754      1 0x00000000
 ffff88003b479c48 0000000000000086 ffff880000000001 000000013712d580
 0000000000000000 ffff88003f810080 ffff88003faacc00 ffff88003f8224c0
 ffff88003712db38 ffff88003b479fd8 000000000000f4e8 ffff88003712db38
Call Trace:
 [<ffffffff81090d7e>] ? prepare_to_wait+0x4e/0x80
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1754 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1754      1 0x00000000
 ffff88003b479c48 0000000000000086 ffff880000000001 000000013712d580
 0000000000000000 ffff88003f810080 ffff88003faacc00 ffff88003f8224c0
 ffff88003712db38 ffff88003b479fd8 000000000000f4e8 ffff88003712db38
Call Trace:
 [<ffffffff81090d7e>] ? prepare_to_wait+0x4e/0x80
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c48 0000000000000086 0000000000000000 00000001810949db
 0000000000000000 0000000000000000 ffff88003b683cb0 0000000000000000
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c48 0000000000000086 0000000000000000 00000001810949db
 0000000000000000 0000000000000000 ffff88003b683cb0 0000000000000000
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
INFO: task glusterfsd:1878 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
glusterfsd    D 0000000000000000     0  1878      1 0x00000000
 ffff88003b683c48 0000000000000086 0000000000000000 00000001810949db
 0000000000000000 0000000000000000 ffff88003b683cb0 0000000000000000
 ffff880037a9e6b8 ffff88003b683fd8 000000000000f4e8 ffff880037a9e6b8
Call Trace:
 [<ffffffffa00de09d>] do_get_write_access+0x29d/0x520 [jbd2]
 [<ffffffff81090ad0>] ? wake_bit_function+0x0/0x50
 [<ffffffffa00de471>] jbd2_journal_get_write_access+0x31/0x50 [jbd2]
 [<ffffffffa0132b78>] __ext4_journal_get_write_access+0x38/0x80 [ext4]
 [<ffffffffa010e253>] ext4_reserve_inode_write+0x73/0xa0 [ext4]
 [<ffffffffa0107158>] ? call_filldir+0x78/0xe0 [ext4]
 [<ffffffffa010e2cc>] ext4_mark_inode_dirty+0x4c/0x1d0 [ext4]
 [<ffffffffa010e5c0>] ext4_dirty_inode+0x40/0x60 [ext4]
 [<ffffffff8119fceb>] __mark_inode_dirty+0x3b/0x160
 [<ffffffff8119040d>] touch_atime+0x12d/0x170
 [<ffffffff8118a290>] ? filldir+0x0/0xe0
 [<ffffffff8118a526>] vfs_readdir+0xd6/0xe0
 [<ffffffff8118a699>] sys_getdents+0x89/0xf0
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b
[root@gluster01 ~]#


[root@gluster01 ~]# mount
/dev/sda3 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext4 (rw)
/dev/sdb1 on /GLUSTER01 type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

[root@gluster01 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3              18G  1.8G   15G  11% /
tmpfs                 499M     0  499M   0% /dev/shm
/dev/sda1             248M  103M  133M  44% /boot
/dev/sdb1             1.4T  198M  1.4T   1% /GLUSTER01

[root@gluster01 ~]# gluster -V
glusterfs 3.2.5 built on Dec  7 2011 18:41:39
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.

[root@gluster01 ~]# uname -a
Linux gluster01.prod 2.6.32-220.4.1.el6.x86_64 #1 SMP Tue Jan 24 02:13:44 GMT 2012 x86_64 x86_64 x86_64 GNU/Linux


THE MACHINE RUNS CENTOS 6.2
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