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Re: [Cluster-devel] Kernel panic on mounting gfs2: kernel 2.6.19 and 2.6.20.



Hi,

On Thu, 2007-02-08 at 14:04 +0100, Zbyszek Żółkiewski wrote:
> sorry - mail went only to Steven, now to group....
> 
> 
> On 2/8/07, Zbyszek Żółkiewski <zbyszek toliman pl> wrote:
>         well, thanks for answer, i have tried with nolock, and result
>         is as follow:
>         of course i made mkfs -t gfs2 -p lock_nolock -t xmpp-alt2:test
>         -j 1 /dev/sdb1 and then: 
>         mount -t gfs2 /dev/sdb1 /mnt -v
>         
>         and yes - the device is mounted, 
It looks like what is happening is that a glmutex_unlock() is
discovering that its spinlock has been dropped by glock.c:run_queue()
which should be impossible, so something odd is happening here I think.

The daemons implicated in this are there to demote unused locks on a
periodic basis, so its presumably one of the locks used during mounting
of the filesystem thats at fault.

>         (the changes to kernel you was talking about: you mean: git1
>         for 2.6.20?)
>         
I'm not sure if its in git1 or not, I suspect it will be git2 since it
was only yesterday that the patches went in. Linus' current git tree
seems to be broken (both gitweb and direct via the git tools) otherwise
I'd post a URL to the changes. In the mean time you can find them in my
-nmw tree which will get updated just as soon as git it working again at
kernel.org,

Steve.

>         
>         Feb  8 13:52:46 xmpp-alt2 kernel: Lock_Nolock (built Feb  8
>         2007 13:52:20) installed
>         Feb  8 13:58:13 xmpp-alt2 kernel: GFS2: fsid=: Trying to join
>         cluster "lock_nolock", "xmpp-alt2:test" 
>         Feb  8 13:58:13 xmpp-alt2 kernel: GFS2: fsid=xmpp-alt2:test.0:
>         Joined cluster. Now mounting FS...
>         Feb  8 13:58:13 xmpp-alt2 kernel: GFS2: fsid=xmpp-alt2:test.0:
>         jid=0, already locked for use
>         Feb  8 13:58:13 xmpp-alt2 kernel: GFS2: fsid=xmpp-alt2:
>         test.0: jid=0: Looking at journal...
>         Feb  8 13:58:13 xmpp-alt2 kernel: GFS2: fsid=xmpp-alt2:test.0:
>         jid=0: Done
>         Feb  8 13:58:13 xmpp-alt2 kernel: ------------[ cut
>         here ]------------
>         Feb  8 13:58:13 xmpp-alt2 kernel: kernel BUG at
>         fs/gfs2/glock.c:738! 
>         Feb  8 13:58:13 xmpp-alt2 kernel: invalid opcode: 0000 [#1]
>         Feb  8 13:58:13 xmpp-alt2 kernel: Modules linked in:
>         lock_nolock lock_dlm gfs2 dlm configfs
>         Feb  8 13:58:13 xmpp-alt2 kernel: CPU:    0
>         Feb  8 13:58:13 xmpp-alt2 kernel: EIP:    0060:[<f895011e>]
>         Not tainted VLI 
>         Feb  8 13:58:13 xmpp-alt2 kernel: EFLAGS: 00000282
>         (2.6.20-xmpp2 #1)
>         Feb  8 13:58:13 xmpp-alt2 kernel: EIP is at
>         gfs2_glmutex_unlock+0x18/0x1c [gfs2]
>         Feb  8 13:58:13 xmpp-alt2 kernel: eax: f5085bbc   ebx:
>         f5085bec   ecx: f5875000   edx: f5085bbc 
>         Feb  8 13:58:13 xmpp-alt2 kernel: esi: f5085b78   edi:
>         f575ff88   ebp: f575ff94   esp: f575ff64
>         Feb  8 13:58:13 xmpp-alt2 kernel: ds: 007b   es: 007b   ss:
>         0068
>         Feb  8 13:58:13 xmpp-alt2 kernel: Process gfs2_glockd (pid:
>         2645, ti=f575e000 task=f58d3550 task.ti=f575e000)
>         Feb  8 13:58:13 xmpp-alt2 kernel: Stack: f89518e5 f5875000
>         f5875364 f8948861 00000000 f58d3550 c0123580 f575ffa0
>         Feb  8 13:58:13 xmpp-alt2 kernel:        f575ffa0 f575ffac
>         c010f84f 00000000 00000000 f58d3550 c0123580 f575ffa0 
>         Feb  8 13:58:13 xmpp-alt2 kernel:        f575ffa0 000004f8
>         b716dc5d 0024d983 f5011dc4 f5875000 f8948830 fffffffc
>         Feb  8 13:58:13 xmpp-alt2 kernel: Call Trace:
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<f89518e5>]
>         gfs2_reclaim_glock+0x8d/0x8f [gfs2] 
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<f8948861>] gfs2_glockd
>         +0x31/0xe4 [gfs2]
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c0123580>]
>         autoremove_wake_function+0x0/0x43
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c010f84f>]
>         __wake_up_common+0x33/0x56 
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c0123580>]
>         autoremove_wake_function+0x0/0x43
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<f8948830>] gfs2_glockd
>         +0x0/0xe4 [gfs2]
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c012320b>] kthread
>         +0x9d/0xce 
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c012316e>] kthread
>         +0x0/0xce
>         Feb  8 13:58:13 xmpp-alt2 kernel:  [<c01034df>]
>         kernel_thread_helper+0x7/0x10
>         Feb  8 13:58:13 xmpp-alt2 kernel:  ======================= 
>         Feb  8 13:58:13 xmpp-alt2 kernel: Code: c3 65 a1 08 00 00 00
>         89 42 24 8b 04 24 89 42 28 89 c8 c3 0f ba 70 08 01 c7 40 24 00
>         00 00 00 c7 40 28 00 00 00 00 e8 7a fe ff ff <0f> 0b eb fe 55
>         89 d5 57 89 c7 56 31 f6 53 8d 58 3c 83 ec 04 8b 
>         Feb  8 13:58:13 xmpp-alt2 kernel: EIP: [<f895011e>]
>         gfs2_glmutex_unlock+0x18/0x1c [gfs2] SS:ESP 0068:f575ff64
>         Feb  8 13:58:28 xmpp-alt2 kernel:  <0>------------[ cut
>         here ]------------
>         Feb  8 13:58:28 xmpp-alt2 kernel: kernel BUG at
>         fs/gfs2/glock.c:738! 
>         Feb  8 13:58:28 xmpp-alt2 kernel: invalid opcode: 0000 [#2]
>         Feb  8 13:58:28 xmpp-alt2 kernel: Modules linked in:
>         lock_nolock lock_dlm gfs2 dlm configfs
>         Feb  8 13:58:28 xmpp-alt2 kernel: CPU:    0
>         Feb  8 13:58:28 xmpp-alt2 kernel: EIP:    0060:[<f895011e>]
>         Not tainted VLI 
>         Feb  8 13:58:28 xmpp-alt2 kernel: EFLAGS: 00000282
>         (2.6.20-xmpp2 #1)
>         Feb  8 13:58:28 xmpp-alt2 kernel: EIP is at
>         gfs2_glmutex_unlock+0x18/0x1c [gfs2]
>         Feb  8 13:58:28 xmpp-alt2 kernel: eax: f5085bbc   ebx:
>         f5085b78   ecx: f5875000   edx: f5085bbc 
>         Feb  8 13:58:28 xmpp-alt2 kernel: esi: f5875000   edi:
>         f5085b78   ebp: 00000001   esp: f577df98
>         Feb  8 13:58:28 xmpp-alt2 kernel: ds: 007b   es: 007b   ss:
>         0068
>         Feb  8 13:58:28 xmpp-alt2 kernel: Process gfs2_scand (pid:
>         2644, ti=f577c000 task=f58d3a70 task.ti=f577c000)
>         Feb  8 13:58:28 xmpp-alt2 kernel: Stack: f8951940 f8951942
>         000001e0 f5875000 f8948800 fffffffc f89519aa f5875000
>         Feb  8 13:58:28 xmpp-alt2 kernel:        f5875000 f894880c
>         f5011dc4 c012320b 00000001 ffffffff ffffffff c012316e 
>         Feb  8 13:58:28 xmpp-alt2 kernel:        00000000 00000000
>         00000000 c01034df f5011dbc 00000000 00000000 00000000
>         Feb  8 13:58:28 xmpp-alt2 kernel: Call Trace:
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<f8951940>] examine_bucket
>         +0x59/0x5b [gfs2] 
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<f8951942>] scan_glock
>         +0x0/0x51 [gfs2]
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<f8948800>] gfs2_scand
>         +0x0/0x30 [gfs2]
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<f89519aa>]
>         gfs2_scand_internal+0x17/0x22 [gfs2] 
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<f894880c>] gfs2_scand
>         +0xc/0x30 [gfs2]
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<c012320b>] kthread
>         +0x9d/0xce
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<c012316e>] kthread
>         +0x0/0xce 
>         Feb  8 13:58:28 xmpp-alt2 kernel:  [<c01034df>]
>         kernel_thread_helper+0x7/0x10
>         Feb  8 13:58:28 xmpp-alt2 kernel:  =======================
>         Feb  8 13:58:28 xmpp-alt2 kernel: Code: c3 65 a1 08 00 00 00
>         89 42 24 8b 04 24 89 42 28 89 c8 c3 0f ba 70 08 01 c7 40 24 00
>         00 00 00 c7 40 28 00 00 00 00 e8 7a fe ff ff <0f> 0b eb fe 55
>         89 d5 57 89 c7 56 31 f6 53 8d 58 3c 83 ec 04 8b 
>         Feb  8 13:58:28 xmpp-alt2 kernel: EIP: [<f895011e>]
>         gfs2_glmutex_unlock+0x18/0x1c [gfs2] SS:ESP 0068:f577df98
>         
>         
>         
>         
>         
>         On 2/8/07, Steven Whitehouse <swhiteho redhat com> wrote:
>                 Hi,
>                 
>                 On Thu, 2007-02-08 at 13:15 +0100, Zbyszek Żółkiewski
>                 wrote:
>                 > Hi,
>                 >
>                 > I have recently setup cluster on Debian systems and
>                 i got issues
>                 > related with kernel panic:
>                 > systems affected: Debian 4.0 (testing)  and Debian
>                 3.1 (r4)
>                 > gcc: 3.4 and 4.1.2
>                 > kernels: 2.6.19 and 2.6.20
>                 > cluster from latest cvs
>                 >
>                 > command invoked: mount -t gfs2 /dev/sdb1 /mnt/
>                 > docs that i followed : 
>                 >
>                 http://sources.redhat.com/cgi-bin/cvsweb.cgi/cluster/doc/usage.txt?cvsroot=cluster
>                 >
>                 > any clue?
>                 > 
>                 It looks like the mount was successful, but that the
>                 problem occurred
>                 right after mount. Just as a sanity check does the
>                 same thing happen if
>                 you use lock_nolock?
>                 
>                 There have been a number of bug fixes since 2.6.20
>                 which went into
>                 Linus' kernel yesterday, so you might want to try the
>                 latest upstream
>                 kernel, but I don't recognise this problem as being
>                 something we've seen
>                 before,
>                 
>                 Steve.
>                 
>         
>         
>         -- 
>         pozdrawiam,
>         Zbyszek Żółkiewski
> 
> 
> 
> -- 
> pozdrawiam,
> Zbyszek Żółkiewski


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