On Wed, 2024-12-04 at 15:45 +0000, Jeff Layton via Bugspray Bot wrote: > Jeff Layton writes via Kernel.org Bugzilla: > > Li Lingfeng's analysis looks basically correct to me, though I think > the nfsd_mutex is mostly a red-herring here. > > The client holds the shrinker rwsem and is trying to write back data. > The server is trying to unregister a shrinker as part of server > shutdown and has almost certainly stopped responding to requests at > that point. The client is using hard RPCs, so it's going to retry the > writeback indefinitely while holding the shrinker mutex, which will > block server shutdown. > > I don't see a great way to fix this right offhand, though I wonder if > localio might help mitigate this problem. > > View: > https://bugzilla.kernel.org/show_bug.cgi?id=219550#c4 > You can reply to this message to join the discussion. localio won't help with the task of returning a delegation, as per the stack trace that was shown: https://lore.kernel.org/linux-nfs/20241203-b219550c0-abf5589a5df5@xxxxxxxxxxxxxxxxxxx/ If the server is no longer responding to RPC calls, then the client should probably just let the delegreturn call time out and expire after 2 lease periods. -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
