Re: [2/2] 2.6.23-rc5: known regressions with patches

Re: [2/2] 2.6.23-rc5: known regressions with patches

[Michal Piotrowski]

Hi all,

Here is a list of some known regressions in 2.6.23-rc5
with patches available.

Feel free to add new regressions/remove fixed etc.
http://kernelnewbies.org/known_regressions

List of Aces

Name                    Regressions fixed since 21-Jun-2007
Adrian Bunk                            9
Linus Torvalds                         6
Andi Kleen                             5
Hugh Dickins                           5
Andrew Morton                          4
Al Viro                                3
Alan Stern                             3
Alexey Starikovskiy                    3
Cornelia Huck                          3
Jens Axboe                             3
Stephen Hemminger                      3
Tejun Heo                              3



Kconfig

Subject         : CONFIG_HOTPLUG_CPU: kconfig bug?
References      : http://lkml.org/lkml/2007/8/27/204
Last known good : ?
Submitter       : Hugh Dickins <hugh@veritas.com>
Caused-By       : ?
Handled-By      : Roman Zippel <zippel@linux-m68k.org>
                  Sam Ravnborg <sam@ravnborg.org>
Patch           : http://lkml.org/lkml/2007/8/29/301
Status          : patch available



MMC

Subject         : Unable to access memory card reader anymore
References      : http://bugzilla.kernel.org/show_bug.cgi?id=8885
Last known good : ?
Submitter       : Christian Casteyde <casteyde.christian@free.fr>
Caused-By       : ?
Handled-By      : Alan Stern <stern@rowland.harvard.edu>
Patch           : http://bugzilla.kernel.org/attachment.cgi?id=12438
Status          : patch available



MTD

Subject         : error: implicit declaration of function 'cfi_interleave'
References      : http://lkml.org/lkml/2007/8/6/272
Last known good : ?
Submitter       : Ingo Molnar <mingo@elte.hu>
Caused-By       : ?
Handled-By      : David Woodhouse <dwmw2@infradead.org>
Patch           : http://lkml.org/lkml/2007/8/9/586
Status          : patch available



Networking

Subject         : [OOPS] 2.6.23-rc5 ? network/via-rhine
References      : http://lkml.org/lkml/2007/9/2/58
Last known good : ?
Submitter       : Mark Hindley <mark@hindley.org.uk>
Caused-By       : ?
Handled-By      : David S. Miller <davem@sunset.davemloft.net>
Patch           : http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commit;h=5c127c58ae9bf196d787815b1bd6b0aec5aee816
Status          : patch available



PATA/SATA

Subject         : sata_via: write errors on PATA drive connected to VT6421
References      : http://lkml.org/lkml/2007/8/20/248
Last known good : ?
Submitter       : Ondrej Zary <linux@rainbow-software.org>
Caused-By       : ?
Handled-By      : Ondrej Zary <linux@rainbow-software.org>
Patch           : http://lkml.org/lkml/2007/8/31/310
Status          : patch available

Subject         : NULL pointer dereference in ata_piix
References      : http://lkml.org/lkml/2007/9/1/33
Last known good : ?
Submitter       : Grant Wilson <grant.wilson@zen.co.uk>
Caused-By       : ?
Handled-By      : Jeff Garzik <jeff@garzik.org>
Patch           : http://lkml.org/lkml/2007/9/1/46
Status          : patch available



Regards,
Michal

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Re: [2/2] 2.6.23-rc5: known regressions with patches

[David Woodhouse]

On Mon, 2007-09-03 at 12:11 +0200, Michal Piotrowski wrote:
> MTD
> 
> Subject         : error: implicit declaration of function 'cfi_interleave'
> References      : http://lkml.org/lkml/2007/8/6/272
> Last known good : ?
> Submitter       : Ingo Molnar <mingo@elte.hu>
> Caused-By       : ?
> Handled-By      : David Woodhouse <dwmw2@infradead.org>
> Patch           : http://lkml.org/lkml/2007/8/9/586
> Status          : patch available 

This isn't really a regression -- it's been like this for years. It's a
non-functional configuration which doesn't really make sense, and would
only crop up with randconfig (or crack).

Linus was offered the patch a few weeks ago, but didn't take it -- it's
not really a priority for 2.6.23. It's in my git tree and will be pushed
when the 2.6.24 merge window opens.

http://git.infradead.org/?p=mtd-2.6.git;a=commitdiff;h=241651d04d672fb685b2874707016cbbf95931e5

-- 
dwmw2

Re: [2/2] 2.6.23-rc5: known regressions with patches

[Satyam Sharma]

On Thu, 6 Sep 2007, David Woodhouse wrote:
> 
> This isn't really a regression -- it's been like this for years. It's a
> non-functional configuration which doesn't really make sense, and would
> only crop up with randconfig (or crack).
> 
> Linus was offered the patch a few weeks ago, but didn't take it -- it's
> not really a priority for 2.6.23. It's in my git tree and will be pushed
> when the 2.6.24 merge window opens.
> 
> http://git.infradead.org/?p=mtd-2.6.git;a=commitdiff;h=241651d04d672fb685b2874707016cbbf95931e5

You shouldn't push this even for 2.6.24 ... I can't see why/how a runtime
BUG() scores over erroring out at build-time itself. And if there is no
codepath that leads to that BUG() at runtime, then what's the point of
adding dead code ...

So I wonder if what you're actually looking for is some kind of Kconfig
dependencies that will *prevent* the kind of .config from being generated
that Ingo ran into ?


Satyam

Re: [2/2] 2.6.23-rc5: known regressions with patches

[David Woodhouse]

On Thu, 2007-09-06 at 16:04 +0530, Satyam Sharma wrote:
> You shouldn't push this even for 2.6.24 ... I can't see why/how a runtime
> BUG() scores over erroring out at build-time itself. And if there is no
> codepath that leads to that BUG() at runtime, then what's the point of
> adding dead code ...
>
> So I wonder if what you're actually looking for is some kind of Kconfig
> dependencies that will *prevent* the kind of .config from being generated
> that Ingo ran into ?

I looked at that but decided against it. There's too much hand-holding
and arbitrary 'automatic' crap in the Kconfig crap already, and I
couldn't see a way to do it that didn't make that worse.

As long as we no longer break randconfig builds, it'll be fine. It's not
as if people _run_ those kernels, let alone actually exercise the code
path in question.

-- 
dwmw2

Re: [2/2] 2.6.23-rc5: known regressions with patches

[Michal Piotrowski]

Hi David,

On 06/09/2007, David Woodhouse <dwmw2@infradead.org> wrote:
> On Mon, 2007-09-03 at 12:11 +0200, Michal Piotrowski wrote:
> > MTD
> >
> > Subject         : error: implicit declaration of function 'cfi_interleave'
> > References      : http://lkml.org/lkml/2007/8/6/272
> > Last known good : ?
> > Submitter       : Ingo Molnar <mingo@elte.hu>
> > Caused-By       : ?
> > Handled-By      : David Woodhouse <dwmw2@infradead.org>
> > Patch           : http://lkml.org/lkml/2007/8/9/586
> > Status          : patch available
>
> This isn't really a regression -- it's been like this for years.

Ok, I removed it from the KR list.

Regards,
Michal

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