On Tue, 2021-11-30 at 11:05 -0500, Bruce Fields wrote: > On Tue, Nov 30, 2021 at 03:36:43PM +0000, Chuck Lever III wrote: > > I am a little concerned that we are trying to optimize a case > > that won't happen during practice. pynfs does not reflect any > > kind of realistic or reasonable client behavior -- it's designed > > to test very specific server operations. > > I wonder how hard this problem would be to hit in normal use. I > mean, a > few hundred or a thousand clients doesn't sound that crazy. This > case > depends on an open deny, but you could hit the same problem with file > locks. Would it be that weird to have a client trying to get a write > lock on a file read-locked by a bunch of other clients? > That's a scenario that is subject to starvation problems anyway. Particularly so on NFSv4.0, which lacks CB_NOTIFY_LOCK. -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
