From: Ingo Molnar <mingo@elte.hu>
To: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: hpa@zytor.com, tglx@linutronix.de, andi@firstfloor.org,
hch@infradead.org, linux-kernel@vger.kernel.org,
Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [patch 1/2] x86, fpu: split FPU state from task struct - v3
Date: Tue, 4 Mar 2008 21:53:53 +0100 [thread overview]
Message-ID: <20080304205353.GA31546@elte.hu> (raw)
In-Reply-To: <20080304175909.GE28006@linux-os.sc.intel.com>
* Suresh Siddha <suresh.b.siddha@intel.com> wrote:
> > v3: Fixed the non-atomic calling sequence in atomic context.
> >
> > is that the same bug?
>
> Yes. Sorry for not pointing out explicitly. Essentially 32bit kernel
> with CONFIG_PREEMPT is calling math_state_restore() with interrupts
> disabled. Handled this by enabling/disabling the interrupts around the
> blocking call. with small code changes ensuring that it is safe to
> enable/disable interrupts at this point.
>
> Do you want a v4 or separate patch for handling the kmem_cache_alloc()
> failure
would be nice to resend a v4 - i couldnt pick v3 up due to the pending
questions. (the NULL thing was quite serious)
Ingo
prev parent reply other threads:[~2008-03-04 20:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-03 23:02 [patch 1/2] x86, fpu: split FPU state from task struct - v3 Suresh Siddha
2008-03-03 23:02 ` [patch 2/2] x86, fpu: lazy allocation of FPU area " Suresh Siddha
2008-03-04 1:20 ` Christoph Hellwig
2008-03-04 1:43 ` Suresh Siddha
2008-03-04 10:32 ` Ingo Molnar
2008-03-04 17:55 ` Suresh Siddha
2008-03-05 19:47 ` Pavel Machek
2008-03-06 15:51 ` Ingo Molnar
2008-03-06 19:10 ` Suresh Siddha
2008-03-06 20:24 ` Pavel Machek
2008-03-06 20:52 ` Andi Kleen
2008-03-07 12:29 ` H. Peter Anvin
2008-03-07 13:06 ` Arjan van de Ven
2008-03-07 13:18 ` Andi Kleen
2008-03-07 13:20 ` Arjan van de Ven
2008-03-07 13:27 ` Andi Kleen
2008-03-05 19:48 ` Pavel Machek
2008-03-06 19:26 ` Suresh Siddha
2008-03-06 21:21 ` Pavel Machek
2008-03-04 1:18 ` [patch 1/2] x86, fpu: split FPU state from task struct " Christoph Hellwig
2008-03-04 1:36 ` Suresh Siddha
2008-03-04 8:20 ` Ingo Molnar
2008-03-06 12:39 ` Christoph Hellwig
2008-03-04 10:28 ` Ingo Molnar
2008-03-04 17:59 ` Suresh Siddha
2008-03-04 20:53 ` Ingo Molnar [this message]
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