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transaction->t_forget == NULL assertion failure with data=journal



It appears that this bug in data=journal mode,

   https://listman.redhat.com/archives/ext3-users/2005-February/msg00045.html

isn't fixed in 2.6.11.11.

Andrew, I've CC'd you since you have previously looked at this specific issue.

I'm seeing this problem on dual-Opteron x86-64 boxes serving NFS + Samba3 to
a few dozen clients; it takes several hours at high load to reproduce.
We have not tested 2.6.12-rc6 yet, as I need to schedule time for the
clients on the cluster.  I will try and do that ASAP.   I see several important
fixes on the bk-commits-head list, but none of them jump out at me as being
obviously more relevant to data=journal than data=ordered.

Meanwhile, I'll endeavor and reproduce this locally.  It would be really
useful to hunt this down and kill it, because NFS over Ext3 otherwise
performs very well in data=journal mode.  Suggestions welcome.

	-Bill

Assertion failure in __journal_drop_transaction() at fs/jbd/checkpoint.c:625: "transaction->t_forget == NULL"
----------- [cut here ] --------- [please bite here ] ---------
Kernel BUG at checkpoint:625
invalid operand: 0000 [1]
SMP
CPU 1

Modules linked in: e1000 qla2300 qla2xxx netconsole thermal processor fan button battery ac eeprom adm1026 i2c_sensor i2c_amd756 i2c_core
Pid: 17828, comm: kjournald Not tainted 2.6.11.11
RIP: 0010:[<ffffffff801f347f>] ffffffff801f347f>{__journal_drop_transaction+319}
RSP: 0018:ffff810028841b58  EFLAGS: 00010296
RAX: 0000000000000071 RBX: ffff8100f840fe00 RCX: ffffffff80612d88
RDX: ffffffff80612d88 RSI: 0000000000000292 RDI: ffffffff80612d80
RBP: ffff8100faf21800 R08: ffff8100f7b45b40 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8100ccba49c0
R13: ffff8100faf21800 R14: 0000000000000000 R15: ffff8100faf2195c
FS:  00002aaaaade8b00(0000) GS:ffffffff80847e00(0000) knlGS:00000000557b26c0
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00002aaaaaac2000 CR3: 000000007f6fb000 CR4: 00000000000006e0
Process kjournald (pid: 17828, threadinfo ffff810028840000, task ffff8100fb3e0230)
Stack: ffff81007ee618c8 ffff8100faf21800 ffff81003adc3ce8 ffffffff801f36c3
       ffff81002fc7d1e8 ffffffff801f275e 0000000100000000 ffff8100faf21824
       00000e8c00000000 ffff8100b32d0174
Call Trace:
ffffffff801f36c3>{__journal_remove_checkpoint+99}
ffffffff801f275e>{journal_commit_transaction+3534}
ffffffff8014aec0>{autoremove_wake_function+0}
ffffffff8014aec0>{autoremove_wake_function+0}
ffffffff8012f047>{recalc_task_prio+327}
ffffffff801f6e2c>{kjournald+268}
ffffffff8014aec0>{autoremove_wake_function+0}
ffffffff80175b4e>{filp_close+126}
ffffffff8014aec0>{autoremove_wake_function+0}
ffffffff801f6fd0>{commit_timeout+0}
ffffffff8010f0f7>{child_rip+8}
ffffffff801f6d20>{kjournald+0}
ffffffff8010f0ef>{child_rip+0}
Code: 0f 0b b9 12 59 80 ff ff ff ff 71 02 66 66 90 66 90 48 83 7b

RIP ffffffff801f347f>{__journal_drop_transaction+319}
RSP <ffff810028841b58>


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