Hi： When storage network is unstable, it may trigger the panic in ocfs2_start_trans. ocfs2_start_trans -> ocfs2_abort ->panic，whether there is a better way to solve this problem？ Just mark as a mistake instead of ocfs2_abort. Finally, any feedback about this process (positive or negative) would be greatly appreciated.
Callback as follows： Jul 8 15:34:16 cvk99 kernel: [72056.516720] (o2hb-5CED29F793,5052,1):o2hb_bio_end_io:381 ERROR: IO Error -5 Jul 8 15:34:16 cvk99 kernel: [72056.516723] (o2hb-5CED29F793,5052,1):o2hb_do_disk_heartbeat:993 ERROR: status = -5 Jul 8 15:34:16 cvk99 kernel: [72056.516730] (pool,7938,6):ocfs2_commit_trans:393 ERROR: status = -5 Jul 8 15:34:16 cvk99 kernel: [72056.516733] (pool,7938,6):ocfs2_write_begin_inline:1515 ERROR: status = -30 Jul 8 15:34:16 cvk99 kernel: [72056.516735] (pool,7938,6):ocfs2_try_to_write_inline_data:1594 ERROR: status = -30 Jul 8 15:34:16 cvk99 kernel: [72056.516738] (pool,7938,6):ocfs2_write_begin_nolock:1721 ERROR: status = -30 Jul 8 15:34:16 cvk99 kernel: [72056.516741] (pool,7938,6):ocfs2_write_begin:1937 ERROR: status = -30 Jul 8 15:34:16 cvk99 kernel: [72056.516772] (pool,8052,0):ocfs2_start_trans:368 ERROR: status = -30 Jul 8 15:34:16 cvk99 kernel: [72056.516776] OCFS2: abort (device sdb): ocfs2_start_trans: Detected aborted journal ________________________________ zhangguanghui 发件人： zhangguanghui 10102<mailto:[email protected]> 发送时间： 2015-07-06 10:29 收件人： Joseph Qi<mailto:[email protected]>; Andrew Morton<mailto:[email protected]> 抄送： Mark Fasheh<mailto:[email protected]>; Joel Becker<mailto:[email protected]>; [email protected]<mailto:[email protected]> 主题： Re: [PATCH] ocfs2: do not BUG if buffer not uptodate in __ocfs2_journal_access This patch is currently verified and working well for two weeks. So it is reasonable for the case. Finally, any feedback about this process (positive or negative) would be greatly appreciated. ________________________________ zhangguanghui From: Joseph Qi<mailto:[email protected]> Date: 2015-07-06 10:05 To: Andrew Morton<mailto:[email protected]> CC: Mark Fasheh<mailto:[email protected]>; Joel Becker<mailto:[email protected]>; zhangguanghui 10102 (CCPL)<mailto:[email protected]>; [email protected]<mailto:[email protected]> Subject: [PATCH] ocfs2: do not BUG if buffer not uptodate in __ocfs2_journal_access When storage network is unstable, it may trigger the BUG in __ocfs2_journal_access because of buffer not uptodate. We can retry the write in this case or return error instead of BUG. Reported-by: Zhangguanghui <[email protected]> Signed-off-by: Joseph Qi <[email protected]> --- fs/ocfs2/journal.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c index f8206d1..e731374 100644 --- a/fs/ocfs2/journal.c +++ b/fs/ocfs2/journal.c @@ -670,7 +670,23 @@ static int __ocfs2_journal_access(handle_t *handle, mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n"); mlog(ML_ERROR, "b_blocknr=%llu\n", (unsigned long long)bh->b_blocknr); - BUG(); + + lock_buffer(bh); + /* + * A previous attempt to write this buffer head failed. + * Nothing we can do but to retry the write and hope for + * the best. + */ + if (buffer_write_io_error(bh) && !buffer_uptodate(bh)) { + clear_buffer_write_io_error(bh); + set_buffer_uptodate(bh); + } + + if (!buffer_uptodate(bh)) { + unlock_buffer(bh); + return -EIO; + } + unlock_buffer(bh); } /* Set the current transaction information on the ci so -- 1.8.4.3 ------------------------------------------------------------------------------------------------------------------------------------- 本邮件及其附件含有杭州华三通信技术有限公司的保密信息，仅限于发送给上面地址中列出 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 邮件！ This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!
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