linux-kernel - Re: 2.4.x libata resync

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Message-Id: <200609201452.k8KEqZBp014384@alkaid.it.uu.se>
Date:	Wed, 20 Sep 2006 16:52:35 +0200 (MEST)
From:	Mikael Pettersson <mikpe@...uu.se>
To:	jeff@...zik.org, w@....eu
Cc:	htejun@...il.com, linux-kernel@...r.kernel.org, tmmlkml@...il.com
Subject: Re: 2.4.x libata resync

On Sat, 16 Sep 2006 18:05:20 +0200, Willy Tarreau wrote:
>> >>Oh there are tons of SATA bug fixes that 2.4.x is missing.  One of the 
>> >>biggest is the completely crappy exception handling.  If a SATA device 
>> >>is unplugged or spazzes out, the system may or may not recover.
>> >
>> >Already encountered on sata_nv in a sun x2100 :-)
>> >
>> >Jeff, I did not want to blindly merge patches from 2.6 to 2.4, but if
>> >you point me to a few ones you consider important, I'm willing to merge
>> >them.
>> 
>> As was hinted, it's not that easy, otherwise someone would have done it 
>> by now.  libata bug fixes require infrastructure that isn't present on 
>> 2.4.  The overall codebase is just too different to easily pull out 
>> select bug fixes.
>
>Of course for those. I was thinking about those which just change one
>register or things like this that I cannot identify the expected effect.
>If you agree, I'll enumerate the ones I've already noticed so that you
>just have to say yes/no/unknown on them. Don't worry, I don't want to
>spend lots of hours on this, since as I said, I do not receive any
>feedback from SATA users on 2.4 (neither positive nor negative).

Here's some positive feedback: My leafnode News server
(a 440BX chipset mobo with a Tualatin PIII-S) has been using
Promise SATA PCI cards (currently a SATA300 TX2plus) for its
disk storage since the SATA update patch was made available
for 2.4.29. It's been fast and reliable the entire time.

/Mikael
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