linux-kernel - Re: [PATCH 2.6.20.3] Flush writes to MSI-X table

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Date:	Sat, 24 Mar 2007 16:33:41 -0700
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Greg KH <gregkh@...e.de>
CC:	"Williams, Mitch A" <mitch.a.williams@...el.com>,
	"Kok, Auke-jan H" <auke-jan.h.kok@...el.com>,
	linux-kernel@...r.kernel.org, mingo@...hat.com,
	"Ronciak, John" <john.ronciak@...el.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Subject: Re: [PATCH 2.6.20.3] Flush writes to MSI-X table

Greg KH wrote:
> On Fri, Mar 23, 2007 at 05:28:02PM -0700, Greg KH wrote:
>> On Fri, Mar 23, 2007 at 05:24:23PM -0700, Williams, Mitch A wrote:
>>> Greg KH wrote:
>>>> Well, I'm sure you can agree that it is _very_ late in the 2.6.21
>>>> release cycle to expect to get this in for that kernel.  How about
>>>> waiting for 2.6.22 and if it's a big deal, getting it into the
>>>> 2.6.21-stable tree if needed.
>>>>
>>>> So far I have not seen any bug reports that this patch would fix, have
>>>> you?
>>> Well, I've seen several bug reports on this issue -- but they're all
>>> internal to Intel.
>>>
>>> However, we do have here a real bug, which shows up on real hardware,
>>> which will be released soon.  Obviously, I can't discuss release
>>> schedules, but "soon" is a good word to use.  You might find out more if
>>> you read The Register (wink, wink).
>> Ok, but again, as this is something that no one outside of a company can
>> see, it doesn't really make sense to rush it into the kernel.
>>
>>> Given the time frame for release of 2.6.21, I'd be fine with skipping
>>> 2.6.20.x, and putting this in 2.6.21.  But we really don't want to wait
>>> for 2.6.22.
>> I think it needs to wait, especially given that there is no public
>> hardware yet.
>>
>> I'll add this to my queue.
> 
> No, nevermind, I'll wait till it hits linux-pci and gets review from the
> people there, as there are a _ton_ of other pending MSI patches that you
> will need to be aware of, as they might conflict with this patch.
> Please see the linux-pci archives for details of them.

Actually Mitch and me have been monitoring those and applying them as they came 
in for the last two months as some of those partially impacted (improved) the 
issue. The read flush to update the msi-x tables is the only thing missing right 
now.

Auke'
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