On Sat, 30 Jan 2021 at 09:50, Fengnan Chang <changfengnan@xxxxxxxx> wrote: > > When writeback cache is enabled, the inode information in cached is > considered new by default, and the inode information of lowerfs is > stale. > When a lower fs is mount in a different directory through different > connection, for example PATHA and PATHB, since writeback cache is > enabled by default, when the file is modified through PATHA, viewing the > same file from the PATHB, PATHB will think that cached inode is newer > than lowerfs, resulting in file size and time from under PATHA and PATHB > is inconsistent. > Add a judgment condition to check whether to use the info in the cache > according to mtime. This seems to break the fsx-linux stress test. I suspect a better direction would be looking at whether the inode has any files open for write (i_writecount > 0)... Thanks, Miklos
