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SubjectRe: [PATCH 0/3] cciss rmmod/scan-thread fixes
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On Wed, 2009-07-15 at 15:08 -0700, Andrew Morton wrote:
> On Tue, 14 Jul 2009 16:02:40 -0600
> Andrew Patterson <andrew.patterson@hp.com> wrote:
>
> > The following series fixes several problems causing hangs while
> > rmmoding the cciss driver. In the process of fixing these hangs, I
> > also reworked the the logical drive scanning kernel thread to use one
> > thread per driver rather than one thread per controller. I also added
> > a sysfs attribute to kick off a controller scan.
> >
> > .../ABI/testing/sysfs-bus-pci-devices-cciss | 7 +
> > drivers/block/cciss.c | 198 ++++++++++++++++++--
> > drivers/block/cciss.h | 7 +
> > 3 files changed, 188 insertions(+), 24 deletions(-)
> >
> > Andrew Patterson (3):
> > cciss: remove logical drive sysfs entries during driver cleanup.
> > cciss: use only one scan thread
> > cciss: kick off logical drive topology rescan through sysfs
> >
>
> So I assume that these are intended to fix the problem which
> cciss-fix-the-termination-of-the-scanning-thread.patch didn't fix?

Correct. As well as a lot of the race conditions during cleanup.

>
> Once we get this all sorted out, which kernel version(s) are we
> targetting and why?

The current problems this patchset tries to solve is that rmmod of the
module hangs along with logical hot remove.

I was hoping to get these in as soon as possible. It looks like the
sysfs additions and the scan_thread patches initially went into 2.6.30
(if my limited git-fu is telling me correctly), so I can't call this a
regression. I guess 2.6.32 then.

>
> Thanks.
>
--
Andrew Patterson
Hewlett-Packard



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