From: Abraham Choi <north.choi@gmail.com>
To: linux-ext4@vger.kernel.org
Subject: Question about JBD2 transactions
Date: Mon, 21 Mar 2016 02:23:55 +0000 (UTC) [thread overview]
Message-ID: <loom.20160321T031409-338@post.gmane.org> (raw)
Hi all,
Frist of all, thank you for Ext4's developer.
I have encounterd a crash problem of ext4 file system on Kernel 3.18.20
with mounting
rw,seclabel,nosuid,nodev,relatime,discard,noauto_da_alloc,data=ordered 0 0.
[ 22.361511] EXT4-fs error (device sda8): ext4_mb_generate_buddy:757:
group 0, block bitmap and bg descriptor inconsistent: 21208 vs 21219 free
clusters
I think, the reason is that recovered transactions has not recovered over
39809 during booting.
Booting N-2
[ 16.416979] (jbd2_journal_recover, 279): JBD2: recovery, exit
status 0, recovered transactions 39665 to 39728
Last commit_sequence=39796
Booting N-1
[ 16.626582] (jbd2_journal_recover, 279): JBD2: recovery, exit
status 0, recovered transactions 39730 to 39797
Last commit_sequence=39866
Booting N
[ 14.118542] (jbd2_journal_recover, 279): JBD2: recovery, exit
status 0, recovered transactions 39799 to 39809
The root casue will be explained the more detail in the follwing.
Jounral Blocks
... <Descriptor block #39808> <Data blocks> <Commit block #39808>
<All zero block> <Descriptor block #39809> <Data blocks> <Commit block
#39809> ...
I'm wondering that journal has all zero data, only 1 block.
How it can be possible?
Any tips or help would be appreciated.
Regards,
Abraham Choi
next reply other threads:[~2016-03-21 2:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 2:23 Abraham Choi [this message]
2016-03-21 5:21 ` Question about JBD2 transactions Theodore Ts'o
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