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:joseph...@huawei.com> Date: 2015-07-06 10:05 To: Andrew Morton<mailto:a...@linux-foundation.org> CC: Mark Fasheh<mailto:mfas...@suse.com>; Joel Becker<mailto:jl...@evilplan.org>; zhangguanghui 10102 (CCPL)<mailto:zhang.guang...@h3c.com>; ocfs2-devel@oss.oracle.com<mailto:ocfs2-devel@oss.oracle.com> 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 <zhang.guang...@h3c.com> Signed-off-by: Joseph Qi <joseph...@huawei.com> --- 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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