cifs: fix dentry lookups in directory handle cache
Get rid of any prefix paths in @path before lookup_positive_unlocked() as it will call ->lookup() which already adds those prefix paths through build_path_from_dentry(). This has caused a performance regression when mounting shares with a prefix path where readdir(2) would end up retrying several times to open bad directory names that contained duplicate prefix paths. Fix this by skipping any prefix paths in @path before calling lookup_positive_unlocked(). Fixes: e4029e07 ("cifs: find and use the dentry for cached non-root directories also") Cc: stable@vger.kernel.org # 6.1+ Signed-off-by:Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by:
Steve French <stfrench@microsoft.com>
parent
7e0e76d9