[Bug 911585] changes to mmap()ed files on XFS do not update file's modification time

http://bugzilla.novell.com/show_bug.cgi?id=911585 --- Comment #2 from Michal Hocko --- (In reply to Michal Hocko from comment #1)

I am not a filesystem expert nor familiar with perl but it might be possible that the mtime was not synced yet because perl didn't flush (msync) the file yet and system does that automatically only after certain (configurable) time.

Hmm, but that shouldn't matter because the stat should be checking the inode via dentry/inode cache so it doesn't care what is on the disk. Maybe perl does some internal caching without calling the kernel. What is the strace output of your test? -- You are receiving this mail because: You are on the CC list for the bug.