Message ID | 20190129003434.316288-1-chadaustin@fb.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | fuse: cache readdir calls if filesystem opts out of opendir | expand |
On Tue, Jan 29, 2019 at 1:34 AM Chad Austin <chadaustin@fb.com> wrote: > > If a filesystem returns ENOSYS from opendir and thus opts out of > opendir and releasedir requests, it almost certainly would also like > readdir results cached. Default open_flags to FOPEN_KEEP_CACHE and > FOPEN_CACHE_DIR in that case. > > With this patch, I've measured recursive directory enumeration across > large FUSE mounts to be faster than native mounts. > > Signed-off-by: Chad Austin <chadaustin@fb.com> Thanks, applied. Miklos
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index cc6ffd23b80f..06096b60f1df 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -124,7 +124,8 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, return -ENOMEM; ff->fh = 0; - ff->open_flags = FOPEN_KEEP_CACHE; /* Default for no-open */ + /* Default for no-open */ + ff->open_flags = FOPEN_KEEP_CACHE | (isdir ? FOPEN_CACHE_DIR : 0); if (isdir ? !fc->no_opendir : !fc->no_open) { struct fuse_open_out outarg; int err;
If a filesystem returns ENOSYS from opendir and thus opts out of opendir and releasedir requests, it almost certainly would also like readdir results cached. Default open_flags to FOPEN_KEEP_CACHE and FOPEN_CACHE_DIR in that case. With this patch, I've measured recursive directory enumeration across large FUSE mounts to be faster than native mounts. Signed-off-by: Chad Austin <chadaustin@fb.com> --- fs/fuse/file.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)