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SubjectRe: [PATCH v2.6.38-rc7] Revert "libata: ahci_start_engine compliant to AHCI spec"
On Sun, 15 May 2011 11:25:19 +0200
"Rafael J. Wysocki" <> wrote:

> On Sunday, May 15, 2011, Jian Peng wrote:
> > Hi, Michael/Rafael/Gu,
> >
> > Could you help me understand the testing environme? I like to
> > reproduce it if it is possible and debug it. The host controller
> > this patch dealing with is not used on PC so my testing environment
> > is quite different.

We have seen it on at least 3 different controllers from at least 2
different vendors (I do not know, what hardware Gu has).

So, for now, it looks like to happen on more different controllers than

Testing environment - uhm, what shall I say? On each of the two
notebooks affected runs 64bit openSuSE 11.4 in more or less default
configuration (apart from kernel, of course).

Just do a "ls -lR /" and watch kernel log while plugging/unplugging

Maybe running a 64bit system/kernel is part of picture? As far as I can
see all affected machines run 64bit.

> Well, the system I can reproduce it on is a production one, so I can't
> really test too much on it. What exactly would you like to do?

I've at least one machine available where I can test. So, if there is
anything (preferably non destructive ;-) ) you want me to test this
should be possible.

Maybe I'll have a look if my netbook (running 32bit) is also affected.


Michael Leun

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