Re: 2.6.20-rc7: known regressions (v2) (part 1)

From: Auke Kok
Date: Sat Feb 03 2007 - 01:07:06 EST


Adrian Bunk wrote:
This email lists some known regressions in 2.6.20-rc7 compared to 2.6.19
that are not yet fixed in Linus' tree.

If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any other way possibly
involved with one or more of these issues.


Subject : e1000: 82571EB/82572EI PCI-E cards: link is always down
(MSI related)
References : http://lkml.org/lkml/2007/1/16/27
http://lkml.org/lkml/2007/1/17/182
Submitter : Allen Parker <parker@xxxxxxxxxxx>
Adam Kropelin <akropel1@xxxxxxxxxxxxxxxx>
Handled-By : Auke Kok <auke-jan.h.kok@xxxxxxxxx>
Status : problem is being debugged

I probably can't fix this bug. Not only do I doubt that the e1000 driver is at fault here, I don't have a system with this particular chipset. Most likely the regression comes from a combination of MSI layer rewrites and possibly platform issues. We've seen many reports that are similar and all are on the platform type mentioned here. I really don't want to point fingers here either.

None of the MSI code in e1000 has changed significantly either. as far as I can see, the msi code in e1000 has not changed since 2.6.18. Nonetheless there's no way I can debug any of this without a system.

I will address the fact that we are lacking any of these systems to test on, but that is not going to get this issue handled (not to mention soon) in the way it needs to be.

I strongly encourage the people on the linux-pci list to help out, I'll trace the e1000 driver for suspicious activity (again), but I run countless tests on the latest trees and nothing has shown up recently, other than Eric Biederman's msi irq reclaim leak fix.

Perhaps Adam can git-bisect this issue? Adam?

Cheers,

Auke
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/