From: Dai Ngo Date: Tue, 8 Oct 2024 22:58:07 +0000 (-0700) Subject: NFS: remove revoked delegation from server's delegation list X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7ef60108069b7e3cc66432304e1dd197d5c0a9b5;p=users%2Fjedix%2Flinux-maple.git NFS: remove revoked delegation from server's delegation list After the delegation is returned to the NFS server remove it from the server's delegations list to reduce the time it takes to scan this list. Network trace captured while running the below script shows the time taken to service the CB_RECALL increases gradually due to the overhead of traversing the delegation list in nfs_delegation_find_inode_server. The NFS server in this test is a Solaris server which issues CB_RECALL when receiving the all-zero stateid in the SETATTR. mount=/mnt/data for i in $(seq 1 20) do echo $i mkdir $mount/testtarfile$i time tar -C $mount/testtarfile$i -xf 5000_files.tar done Signed-off-by: Dai Ngo Reviewed-by: Trond Myklebust Signed-off-by: Anna Schumaker --- diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c index 20cb2008f9e46..035ba52742a50 100644 --- a/fs/nfs/delegation.c +++ b/fs/nfs/delegation.c @@ -1001,6 +1001,11 @@ void nfs_delegation_mark_returned(struct inode *inode, } nfs_mark_delegation_revoked(delegation); + clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags); + spin_unlock(&delegation->lock); + if (nfs_detach_delegation(NFS_I(inode), delegation, NFS_SERVER(inode))) + nfs_put_delegation(delegation); + goto out_rcu_unlock; out_clear_returning: clear_bit(NFS_DELEGATION_RETURNING, &delegation->flags);