From: Andrea Arcangeli <andrea@suse.de>
To: rmk@arm.linux.org.uk
Cc: Linus Torvalds <torvalds@transmeta.com>,
"D . W . Howells" <dhowells@astarte.free-online.co.uk>,
dhowells@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: x86 rwsem in 2.4.4pre[234] are still buggy [was Re: rwsem benchmarks [Re: generic rwsem [Re: Alpha "process table hang"]]]
Date: Sat, 21 Apr 2001 17:04:33 +0200 [thread overview]
Message-ID: <20010421170433.E17757@athlon.random> (raw)
In-Reply-To: <20010421162926.D17757@athlon.random> <200104211437.PAA01945@raistlin.arm.linux.org.uk>
In-Reply-To: <200104211437.PAA01945@raistlin.arm.linux.org.uk>; from rmk@arm.linux.org.uk on Sat, Apr 21, 2001 at 03:37:05PM +0100
On Sat, Apr 21, 2001 at 03:37:05PM +0100, rmk@arm.linux.org.uk wrote:
> Andrea Arcangeli writes:
> > That it is allowed by my generic code that does spin_lock_irq in down_* and
> > spin_lock_irqsave in up_* but it's disallowed by the weaker semantics of the
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > generic and x86 semaphores 2.4.4pre[2345] (or + David's last patch).
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Hang on, who's code is in 2.4.4-pre5? It claims to be Davids, which does
> suffer from the problem I described.
Yes.
Andrea
next prev parent reply other threads:[~2001-04-21 15:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-19 23:28 rwsem benchmarks [Re: generic rwsem [Re: Alpha "process table hang"]] D.W.Howells
2001-04-20 1:42 ` Andrea Arcangeli
2001-04-20 10:10 ` David Howells
2001-04-20 17:17 ` x86 rwsem in 2.4.4pre[234] are still buggy [was Re: rwsem benchmarks [Re: generic rwsem [Re: Alpha "process table hang"]]] Andrea Arcangeli
2001-04-20 23:45 ` Linus Torvalds
2001-04-21 14:03 ` Andrea Arcangeli
2001-04-21 14:17 ` Russell King
2001-04-21 14:29 ` Andrea Arcangeli
2001-04-21 14:37 ` rmk
2001-04-21 15:04 ` Andrea Arcangeli [this message]
2001-04-21 17:18 ` Linus Torvalds
2001-04-21 14:37 ` Russell King
2001-04-21 15:07 ` Andrea Arcangeli
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