From 5eed80fba65cd707075892450bc5d6bd464862a0 Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Thu, 21 Apr 2022 11:26:40 +0800 Subject: ceph: try to choose the auth MDS if possible for getattr If any 'x' caps is issued we can just choose the auth MDS instead of the random replica MDSes. Because only when the Locker is in LOCK_EXEC state will the loner client could get the 'x' caps. And if we send the getattr requests to any replica MDS it must auth pin and tries to rdlock from the auth MDS, and then the auth MDS need to do the Locker state transition to LOCK_SYNC. And after that the lock state will change back. This cost much when doing the Locker state transition and usually will need to revoke caps from clients. URL: https://tracker.ceph.com/issues/55240 Signed-off-by: Xiubo Li Reviewed-by: Jeff Layton Signed-off-by: Ilya Dryomov --- fs/ceph/super.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ceph/super.h') diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 20ceab74e871..d749c96070f6 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -1022,6 +1022,7 @@ static inline void ceph_queue_flush_snaps(struct inode *inode) ceph_queue_inode_work(inode, CEPH_I_WORK_FLUSH_SNAPS); } +extern int ceph_try_to_choose_auth_mds(struct inode *inode, int mask); extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page, int mask, bool force); static inline int ceph_do_getattr(struct inode *inode, int mask, bool force) -- cgit v1.2.3