From: Andrea Arcangeli <andrea@suse.de>
To: Andrew Morton <akpm@digeo.com>
Cc: paulmck@us.ibm.com, dmccr@us.ibm.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Fix vmtruncate race and distributed filesystem race
Date: Mon, 23 Jun 2003 10:10:16 +0200 [thread overview]
Message-ID: <20030623081016.GI19940@dualathlon.random> (raw)
In-Reply-To: <20030623005623.5fe1ab30.akpm@digeo.com>
On Mon, Jun 23, 2003 at 12:56:23AM -0700, Andrew Morton wrote:
> Andrea Arcangeli <andrea@suse.de> wrote:
> >
> > that will finally close the race
>
> Could someone please convince me that we really _need_ to close it?
>
> The VM handles the whacky pages OK (on slowpaths), and when this first came
> up two years ago it was argued that the application was racy/buggy
> anyway. So as long as we're secure and stable, we don't care. Certainly
> not to the point of adding more atomic ops on the fastpath.
>
> So... what bug are we actually fixing here?
we're fixing userspace data corruption with an app trapping SIGBUS.
>
>
> (I'd also like to see a clearer description of the distributed fs problem,
> and how this fixes it).
I certainly would like discussions about it too.
Andrea
WARNING: multiple messages have this Message-ID (diff)
From: Andrea Arcangeli <andrea@suse.de>
To: Andrew Morton <akpm@digeo.com>
Cc: paulmck@us.ibm.com, dmccr@us.ibm.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Fix vmtruncate race and distributed filesystem race
Date: Mon, 23 Jun 2003 10:10:16 +0200 [thread overview]
Message-ID: <20030623081016.GI19940@dualathlon.random> (raw)
In-Reply-To: <20030623005623.5fe1ab30.akpm@digeo.com>
On Mon, Jun 23, 2003 at 12:56:23AM -0700, Andrew Morton wrote:
> Andrea Arcangeli <andrea@suse.de> wrote:
> >
> > that will finally close the race
>
> Could someone please convince me that we really _need_ to close it?
>
> The VM handles the whacky pages OK (on slowpaths), and when this first came
> up two years ago it was argued that the application was racy/buggy
> anyway. So as long as we're secure and stable, we don't care. Certainly
> not to the point of adding more atomic ops on the fastpath.
>
> So... what bug are we actually fixing here?
we're fixing userspace data corruption with an app trapping SIGBUS.
>
>
> (I'd also like to see a clearer description of the distributed fs problem,
> and how this fixes it).
I certainly would like discussions about it too.
Andrea
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next prev parent reply other threads:[~2003-06-23 7:56 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-12 20:16 [PATCH] Fix vmtruncate race and distributed filesystem race Dave McCracken
2003-06-12 20:49 ` Andrew Morton
2003-06-12 20:49 ` Andrew Morton
2003-06-12 21:00 ` Andrew Morton
2003-06-12 21:00 ` Andrew Morton
2003-06-12 21:08 ` Dave McCracken
2003-06-12 21:08 ` Dave McCracken
2003-06-12 21:44 ` Andrew Morton
2003-06-12 21:44 ` Andrew Morton
2003-06-12 22:56 ` Dave McCracken
2003-06-12 23:07 ` Andrew Morton
2003-06-12 23:07 ` Andrew Morton
2003-06-20 0:17 ` Andrea Arcangeli
2003-06-20 0:17 ` Andrea Arcangeli
2003-06-23 3:28 ` Paul E. McKenney
2003-06-23 3:28 ` Paul E. McKenney
2003-06-23 6:29 ` Andrea Arcangeli
2003-06-23 6:29 ` Andrea Arcangeli
2003-06-23 6:32 ` Andrew Morton
2003-06-23 6:32 ` Andrew Morton
2003-06-23 7:43 ` Andrea Arcangeli
2003-06-23 7:43 ` Andrea Arcangeli
2003-06-23 7:56 ` Andrew Morton
2003-06-23 7:56 ` Andrew Morton
2003-06-23 8:10 ` Andrea Arcangeli [this message]
2003-06-23 8:10 ` Andrea Arcangeli
2003-06-24 1:37 ` Paul E. McKenney
2003-06-24 1:37 ` Paul E. McKenney
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