From: Brian Gerst <bgerst@quark.didntduck.org>
To: Robert Love <rml@tech9.net>
Cc: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] make raid5 checksums preempt-safe
Date: Mon, 26 Aug 2002 18:33:27 -0400 [thread overview]
Message-ID: <3D6AACB7.4030506@quark.didntduck.org> (raw)
In-Reply-To: <1030392363.905.418.camel@phantasy>
Robert Love wrote:
> Linus,
>
> The raid5 xor checksums use MMX/SSE state and are not preempt-safe.
>
> Attached patch disables preemption in FPU_SAVE and XMMS_SAVE and
> restores it in FPU_RESTORE and XMMS_RESTORE - preventing preemption
> while in fp mode.
>
> Please, apply.
>
> Robert Love
Use kernel_fpu_begin() and kernel_fpu_end() instead of reinventing the
wheel. The current code is broken wrt SSE as well.
--
Brian Gerst
prev parent reply other threads:[~2002-08-26 22:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-26 20:06 Robert Love
2002-08-26 21:09 ` Thunder from the hill
2002-08-26 21:15 ` Robert Love
2002-08-27 1:38 ` Horst von Brand
2002-08-27 15:25 ` Thunder from the hill
2002-08-27 15:34 ` How can a process easily get a list of all it's open fd? Mark Atwood
2002-08-27 16:08 ` Alex Riesen
2002-08-27 21:26 ` Mike Touloumtzis
2002-08-28 8:28 ` Alex Riesen
2002-08-27 23:21 ` DervishD
2002-08-26 22:33 ` Brian Gerst [this message]
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