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From: Bruce Fields <bfields@fieldses.org>
To: Chuck Lever III <chuck.lever@oracle.com>
Cc: Dai Ngo <dai.ngo@oracle.com>,
	Trond Myklebust <trondmy@hammerspace.com>,
	Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH RFC v5 0/2] nfsd: Initial implementation of NFSv4 Courteous Server
Date: Tue, 30 Nov 2021 11:05:13 -0500	[thread overview]
Message-ID: <20211130160513.GC8837@fieldses.org> (raw)
In-Reply-To: <FC3CB37C-8E5C-4DB0-B31F-0AA2B6D8B57F@oracle.com>

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?

--b.

  reply	other threads:[~2021-11-30 16:05 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-29  0:56 [PATCH RFC v5 0/2] nfsd: Initial implementation of NFSv4 Courteous Server Dai Ngo
2021-09-29  0:56 ` [PATCH RFC v5 1/2] fs/lock: add new callback, lm_expire_lock, to lock_manager_operations Dai Ngo
2021-09-29  0:56 ` [PATCH RFC v5 2/2] nfsd: Initial implementation of NFSv4 Courteous Server Dai Ngo
2021-10-01 20:53 ` [PATCH RFC v5 0/2] " J. Bruce Fields
2021-10-01 21:41   ` dai.ngo
2021-10-01 23:03     ` J. Bruce Fields
2021-11-16 23:06     ` dai.ngo
2021-11-17 14:14       ` J. Bruce Fields
2021-11-17 17:59         ` dai.ngo
2021-11-17 21:46           ` dai.ngo
2021-11-18  0:34             ` J. Bruce Fields
2021-11-22  3:04               ` dai.ngo
2021-11-29 17:13                 ` dai.ngo
2021-11-29 17:30                   ` J. Bruce Fields
2021-11-29 18:32                     ` dai.ngo
2021-11-29 19:03                       ` Chuck Lever III
2021-11-29 19:13                         ` Bruce Fields
2021-11-29 19:39                           ` dai.ngo
2021-11-29 19:36                         ` dai.ngo
2021-11-29 21:01                           ` dai.ngo
2021-11-29 21:10                           ` Chuck Lever III
2021-11-30  0:11                             ` dai.ngo
2021-11-30  1:42                               ` Chuck Lever III
2021-11-30  4:08                                 ` Trond Myklebust
2021-11-30  4:47                                   ` Chuck Lever III
2021-11-30  4:57                                     ` Trond Myklebust
2021-11-30  7:22                                       ` dai.ngo
2021-11-30 13:37                                         ` Trond Myklebust
2021-12-01  3:52                                           ` dai.ngo
2021-12-01 14:19                                             ` bfields
2021-11-30 15:36                                         ` Chuck Lever III
2021-11-30 16:05                                           ` Bruce Fields [this message]
2021-11-30 16:14                                             ` Trond Myklebust
2021-11-30 19:01                                               ` bfields
2021-11-30  7:13                                 ` dai.ngo
2021-11-30 15:32                                   ` Bruce Fields
2021-12-01  3:50                                     ` dai.ngo
2021-12-01 14:36                                       ` Bruce Fields
2021-12-01 14:51                                         ` Bruce Fields
2021-12-01 18:47                                           ` dai.ngo
2021-12-01 19:25                                             ` Bruce Fields
2021-12-02 17:53                                           ` Chuck Lever III
2021-12-01 17:42                                         ` Bruce Fields
2021-12-01 18:03                                           ` Bruce Fields
2021-12-01 19:50                                             ` Bruce Fields
2021-12-03 21:22                                               ` Bruce Fields
2021-12-03 21:55                                                 ` [PATCH] nfsdcld: use WAL journal for faster commits Bruce Fields
2021-12-03 22:07                                                   ` Chuck Lever III
2021-12-03 22:39                                                     ` Bruce Fields
2021-12-04  0:35                                                       ` Chuck Lever III
2021-12-04  1:24                                                         ` Bruce Fields
2021-12-06 15:46                                                           ` Chuck Lever III
2022-01-04 22:24                                                             ` Bruce Fields

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