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Message-ID: <86802c440705181109h458232a1rd85f3794cffa3ff1@mail.gmail.com>
Date: Fri, 18 May 2007 11:09:25 -0700
From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [patch] x86_64, irq: check remote IRR bit before migrating level triggered irq
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>, mingo@elte.hu, ak@suse.de,
       akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
       "Zou, Nanhai" <nanhai.zou@intel.com>,
       "Mallick, Asit K" <asit.k.mallick@intel.com>,
       "Packard, Keith" <keith.packard@intel.com>
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On 5/18/07, Eric W. Biederman <ebiederm@xmission.com> wrote:
> We can solve the problem without doing that, and keeping the same
> vector number during migration keeps x86 from scaling.

I mean ioapic level irq couls be limited. new device could use MSI or
HT irq directly and less irq routing problem.

> Personally I would prefer to disallow irq migration.
? typo?
For amd platform with different hypertransport chain on different
nodes, irq migration is needed.

YH