[LU-10510] Fix 'over max size limit' issue

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Severity: 3
• Assignee: Yang Sheng
• Reporter: Yang Sheng

Description

Some sites have encountered issues with messages like:

May 10 13:54:50 oss02 kernel: blk_cloned_rq_check_limits: over max size limit.
May 10 13:54:50 oss02 kernel: blk_cloned_rq_check_limits: over max size limit.
May 10 13:54:50 oss02 kernel: device-mapper: multipath: Failing path 8:48.
May 10 13:54:50 oss02 kernel: blk_cloned_rq_check_limits: over max size limit.
May 10 13:54:50 oss02 kernel: blk_cloned_rq_check_limits: over max size limit.
May 10 13:54:50 oss02 kernel: device-mapper: multipath: Failing path 8:240.

This issue can cause corruption on storage side. It can be fixed by reverting an upstream patch or adding a udev script (but we will change max_sectors_kb value while mounting time, so it still can be triggered even with this script). The better way is to handle this value in mount.lustre tool. I'll make up a patch for master first.

Issue Links

• is related to: LU-9132 Tuning max_sectors_kb on mount