linux-kernel - Re: [PATCH] i386: irq: Kill IRQ compression

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Message-ID: <m18xeyh2yz.fsf@ebiederm.dsl.xmission.com>
Date:	Fri, 16 Feb 2007 02:21:56 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Natalie Protasevich <Natalie.Protasevich@...sys.com>
Cc:	Len Brown <lenb@...nel.org>, Andi Kleen <ak@...e.de>,
	"lkml - Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH] i386: irq: Kill IRQ compression

ebiederm@...ssion.com (Eric W. Biederman) writes:

> By itself I don't think we are going to observe any real problems
> with this patch.
>
> However if we are going to be serious about this we need to do a
> few more things.
>
> - kill ioapic_renumber_irq.

Looking closer ioapic_renumber_irq does not appear to be an irq
compress thing.  Rather it appears to be a work around for a weird
acpi implementation where gsi 0 - 15 are not the ISA irqs. 

Natalie is my reading of the code there correct?

If so keeping ioapic_renumber_irq makes sense.  Although giving
it a name that suggests it is working around weird implementation
details would be good.

Eric
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