From: Andrew Morton <akpm@osdl.org>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Mark Fasheh <mark.fasheh@oracle.com>,
linux-fsdevel@vger.kernel.org,
Michael Halcrow <mhalcrow@us.ibm.com>
Subject: Re: i_mutex locking in generic_file_splice_write()
Date: Fri, 13 Oct 2006 01:11:29 -0700 [thread overview]
Message-ID: <20061013011129.42a757fb.akpm@osdl.org> (raw)
In-Reply-To: <20061013074516.GY6515@kernel.dk>
On Fri, 13 Oct 2006 09:45:17 +0200
Jens Axboe <jens.axboe@oracle.com> wrote:
> > Compile tested only. I probably won't get a chance to actually run it until
> > late this weekend at the earliest :/
>
> Patch looks ok to me. The double lock test only works, as long as splice
> is the only one ever locking both mutexes. Or if others follow the same
> ordering rules. I'm not very well versed in vfs matters, is that
> guarenteed?
Taking the lowest-addressed lock first is the usual convention, if we really
have to do that. I'm not aware of anywhere else where we pull this
trick with i_mutex though.
next prev parent reply other threads:[~2006-10-13 8:12 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-12 19:01 i_mutex locking in generic_file_splice_write() Mark Fasheh
2006-10-12 19:54 ` Andrew Morton
2006-10-13 0:17 ` Mark Fasheh
2006-10-13 7:45 ` Jens Axboe
2006-10-13 8:11 ` Andrew Morton [this message]
2006-10-13 8:18 ` Jens Axboe
2006-10-13 19:44 ` Mark Fasheh
2006-10-15 18:05 ` Jens Axboe
2006-10-15 19:56 ` Mark Fasheh
2006-10-15 20:08 ` Jens Axboe
2006-10-15 20:14 ` Mark Fasheh
2006-10-16 17:58 ` Andreas Dilger
2006-10-16 22:24 ` Mark Fasheh
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