From: "J. Bruce Fields" <bfields@fieldses.org>
To: David Howells <dhowells@redhat.com>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH] AFS: Implement file locking
Date: Tue, 29 May 2007 16:08:13 -0400 [thread overview]
Message-ID: <20070529200813.GH6815@fieldses.org> (raw)
In-Reply-To: <28654.1180431281@redhat.com>
On Tue, May 29, 2007 at 10:34:41AM +0100, David Howells wrote:
> I'll need to test the upgrade/downgrade case. I don't know whether the AFS
> server supports that. If it doesn't, I can emulate downgrade, but not upgrade
> - not unless I only ever ask it for exclusive locks.
>
> Lock upgrading is really, really easy to contrive deadlock for.
Any such deadlock is the user's fault.
But, right, I agree that upgrades are probably hard to use correctly.
And that implementing them shouldn't be a priority in the case of AFS.
Just as long as the implementation doesn't completely fall over when
somebody attempts an upgrade.
--b.
next prev parent reply other threads:[~2007-05-29 20:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-24 16:55 [PATCH] AFS: Implement file locking David Howells
2007-05-25 7:31 ` Jiri Slaby
2007-05-26 2:23 ` J. Bruce Fields
2007-05-26 3:11 ` Kyle Moffett
2007-05-27 0:12 ` David Howells
2007-05-26 23:55 ` David Howells
2007-05-27 2:25 ` J. Bruce Fields
2007-05-27 8:51 ` David Howells
2007-05-27 16:12 ` J. Bruce Fields
2007-05-29 9:34 ` David Howells
2007-05-29 20:08 ` J. Bruce Fields [this message]
2007-05-29 12:43 ` David Howells
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