[LU-8284] i_size updates from BRW writes are not atomic

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.10.0
• Labels: patch
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Andrew Perepechko

Description

There is a race window in osd_write_commit() between i_size_read() check and i_size_write(). A test case showing the issue and a fix will be uploaded shortly.