We always flush data out of the local cache on any set attribute change
(see line 2434 of fs/cifs/inode.c)
rc = filemap_write_and_wait(inode->i_mapping);
which seems too aggressive since it only needs to be done on ATTR_SIZE
and ATTR_MTIME changes.
With Ronnie's recent patch we also do an smb3 flush request when last
write time changes (to work around the problem where the timestamps
(set e.g. by "cp -p") can be reset to current time on close otherwise.
--
Thanks,
Steve
