linux-kernel - Re: ATA ACPI (was Re: Linux 2.6.21-rc5)

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Date:	Tue, 27 Mar 2007 14:54:42 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Jeff Garzik <jeff@...zik.org>
CC:	IDE/ATA development list <linux-ide@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan <alan@...rguk.ukuu.org.uk>, Len Brown <lenb@...nel.org>,
	Kristen Carlson Accardi <kristen.c.accardi@...el.com>
Subject: Re: ATA ACPI (was Re: Linux 2.6.21-rc5)

Jeff Garzik wrote:
> Linus Torvalds wrote:
>> There's various fixes here, ranging from some architecture updates 
>> (ia64, ARM, MIPS, SH, Sparc64) to KVM, networking and network drivers.
>>
>> And random one-liners.
>>
>> But probably more important, and likely much more visible to most 
>> people is the fixes for the fallout from the hrtimers and no-HZ 
>> changes, and some of the ACPI regressions.
>>
>> Those timer changes ended up much more painful than anybody wished 
>> for, but big thanks to Thomas Gleixner for being on it like a weasel 
>> on a dead rat, and the regression list has kept shrinking.
>>
>> So if you have reported a regression in the 2.6.21-rc series, please 
>> check 2.6.21-rc5, and update your report as appropriate (whether fixed 
>> or "still problems with xyzzy").
>>
>>         Linus
> 
> 
> [just got back from vacation, or would have sent this earlier]
> 
> FWIW, I'm still leaning towards disabling libata ACPI support by default 
> for 2.6.21.
> 
> Upstream has Alan's fix for the worst PATA problems, but for different 
> reasons, I think PATA ACPI and SATA ACPI support in libata does not feel 
> quite ready for prime time in 2.6.21.
> 
> Scream now, or hold your peace until 2.6.22... :)

I second disabling ACPI for 2.6.21.

-- 
tejun
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