From: Daniel Hellstrom <daniel@gaisler.com>
To: sparclinux@vger.kernel.org
Subject: Re: [PATCH 0/4 v2] sparc32: SMP IPI patches
Date: Thu, 19 May 2011 10:18:53 +0000 [thread overview]
Message-ID: <4DD4EE8D.1030905@gaisler.com> (raw)
In-Reply-To: <4DBE8275.5060604@gaisler.com>
David Miller wrote:
>From: Daniel Hellstrom <daniel@gaisler.com>
>Date: Mon, 02 May 2011 12:07:49 +0200
>
>
>
>>I have made a new set of IPI patches, this time it includes patches
>>for all SPARC32 architectures. It looks to me as if sun4d does not
>>have a pending soft-IRQ register, so I handle it as a normal hard IRQ.
>>
>>I'm not sure if I should add a STBAR/memory barrier or a spinlock to
>>the sun4d implementation of smp4d_ipi_{single,mask_one,resched}. I'm a
>>bit worried that the memory write happens after the IPI is generated
>>to the other CPUs. Also, I'm not sure that IRQ14 is the best choice
>>for IPI, the best is probably of put it on a separate IRQ but I don't
>>know if there are free IRQs.
>>
>>I hope that someone could try SMP on sun4m and sun4d with these
>>patches.
>>
>>
>
>I'm not going to hold these patches back, if we find bugs that
>need to be fixed on sun4m/sun4d then we will simply fix them.
>
>Thanks for fixing a problem we've had for such a long time.
>
>
Thanks for applying these pathes. From now on LEON SMP users can run
vanilla kernels.
Daniel
prev parent reply other threads:[~2011-05-19 10:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-02 10:07 [PATCH 0/4 v2] sparc32: SMP IPI patches Daniel Hellstrom
2011-05-16 20:08 ` David Miller
2011-05-19 10:18 ` Daniel Hellstrom [this message]
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