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From: Ingo Molnar <mingo@kernel.org>
To: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Len Brown <len.brown@intel.com>, X86 ML <x86@kernel.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: x86_64: MAX_LOCAL_APIC way too big?
Date: Sat, 26 Sep 2015 08:08:12 +0200	[thread overview]
Message-ID: <20150926060812.GA27630@gmail.com> (raw)
In-Reply-To: <56057344.2070206@redhat.com>


* Denys Vlasenko <dvlasenk@redhat.com> wrote:

> For 64-bit kernels, MAX_LOCAL_APIC is 32k:
> 
> #ifdef CONFIG_X86_32
> ...
> #else
> # define MAX_IO_APICS 128
> # define MAX_LOCAL_APIC 32768
> #endif
> 
> (It seems to be a bit of a misnomer, it's not a maximum
> number of APICs we support, it's the highest APIC _id_
> we support.)

Gah, that's a pretty serious misnomer - so it should be fixed regardless of 
the outcome of the sizing discussion.

Thanks,

	Ingo

      parent reply	other threads:[~2015-09-26  6:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-25 16:16 x86_64: MAX_LOCAL_APIC way too big? Denys Vlasenko
2015-09-25 16:56 ` Jiang Liu
2015-09-25 19:44   ` Denys Vlasenko
2015-09-26  6:08 ` Ingo Molnar [this message]

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