From: Ingo Molnar <mingo@elte.hu>
To: Jack Steiner <steiner@sgi.com>
Cc: tglx@linutronix.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] - Increase MAX_APICS for large configs
Date: Wed, 16 Apr 2008 20:45:43 +0200 [thread overview]
Message-ID: <20080416184543.GD3722@elte.hu> (raw)
In-Reply-To: <20080416163936.GA23099@sgi.com>
* Jack Steiner <steiner@sgi.com> wrote:
> Increase the maximum number of apics when running very large
> configurations. This patch has no affect on most systems.
>
> Signed-off-by: Jack Steiner <steiner@sgi.com>
>
> I think this area of the code will be substantially changed when the
> full x2apic patch is available. In the meantime, this seems like an
> acceptible alternative. The patch has no effect on any 32-bit kernel.
> It adds ~4k to the size of 64-bit kernels but only if NR_CPUS > 255.
ugly ... but well - applied. What's the static size cost of 64K APICs?
Ingo
WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@elte.hu>
To: Jack Steiner <steiner@sgi.com>
Cc: tglx@linutronix.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] - Increase MAX_APICS for large configs
Date: Wed, 16 Apr 2008 20:45:43 +0200 [thread overview]
Message-ID: <20080416184543.GD3722@elte.hu> (raw)
In-Reply-To: <20080416163936.GA23099@sgi.com>
* Jack Steiner <steiner@sgi.com> wrote:
> Increase the maximum number of apics when running very large
> configurations. This patch has no affect on most systems.
>
> Signed-off-by: Jack Steiner <steiner@sgi.com>
>
> I think this area of the code will be substantially changed when the
> full x2apic patch is available. In the meantime, this seems like an
> acceptible alternative. The patch has no effect on any 32-bit kernel.
> It adds ~4k to the size of 64-bit kernels but only if NR_CPUS > 255.
ugly ... but well - applied. What's the static size cost of 64K APICs?
Ingo
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next prev parent reply other threads:[~2008-04-16 18:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-16 16:39 [PATCH] - Increase MAX_APICS for large configs Jack Steiner
2008-04-16 16:39 ` Jack Steiner
2008-04-16 18:45 ` Ingo Molnar [this message]
2008-04-16 18:45 ` Ingo Molnar
2008-04-16 19:22 ` Jack Steiner
2008-04-16 19:22 ` Jack Steiner
2008-04-17 11:07 ` Ingo Molnar
2008-04-17 11:07 ` Ingo Molnar
2008-04-17 18:02 ` Yinghai Lu
2008-04-17 18:02 ` Yinghai Lu
2008-04-18 21:14 ` Jack Steiner
2008-04-18 21:14 ` Jack Steiner
2008-04-18 22:01 ` Yinghai Lu
2008-04-18 22:01 ` Yinghai Lu
2008-04-19 0:01 ` Jack Steiner
2008-04-19 0:01 ` Jack Steiner
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