linux-kernel - Re: [PATCH] Add support for multiple MSI on x86

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Message-ID: <alpine.LFD.2.00.1103082311090.2787@localhost6.localdomain6>
Date:	Tue, 8 Mar 2011 23:13:18 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Micha Nelissen <micha@...i.hopto.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	"Venkatesh Pallipadi (Venki)" <venki@...gle.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Matthew Wilcox <matthew@....cx>
Subject: Re: [PATCH] Add support for multiple MSI on x86

On Tue, 8 Mar 2011, H. Peter Anvin wrote:

> You said MSI-X has replaced MSI, which is true of course but doesn't
> change older devices in the field.

I know, but not for the price of nested loops over nr of cpus with
locks held and interrupts disabled implemented with a metric sh*tload
of horrible code.

Thanks,

	tglx
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