RE: iwlwifi: regression in 3.8-rc4 and 3.7.3

[Grumbach, Emmanuel]

> > > > On Sun, Jan 20, 2013 at 6:56 AM, Hugh Dickins <hughd@xxxxxxxxxx>
> wrote:
> > > > > After sending the first 2MB, scp over wireless becomes
> > > > > unbearably slow, with frequent stalls: on this ThinkPad T420s running
> 3.8-rc4 or 3.7.3.
> > > > > Not always, but often.
> > > > >
> > > >
> > > > There is one pending iwlwifi-fixes, dunno if it will fix your issue.
> > > > [1] http://git.kernel.org/?p=linux/kernel/git/iwlwifi/iwlwifi-
> > > > fixes.git;a=commitdiff;h=c3e5d7181afb66657393066bccce0956fab09ab3
> > >
> > > Right - so the 2 patches are unrelated, and the one Sedat is pointing at is
> relevant for 3.8 only. It fixes a bug that has been introduced in 3.8.
> >
> > Yes, I have now given that one a try, but it does not affect my issue.
> >
> > > Regarding the issue Hugh is suffering from, I have to say that I am a little
> confused since I am pretty sure the patch is right. Now, it might uncover other
> pre-existing bugs. All I can say is that I don't think that reverting the patch is
> *so* problematic since the patch really wants to solve a rare case. If it causes
> issues, we can simply revert it. It only means that when I will get a little bit of
> time, I might need to ask you a few logs. Thanks for the report (and the
> bisection).
> >
> > Sure, let me know what to do, once you have time to investigate.
> >
> > So far as I know, I'm the first to notice: so we can probably leave it
> > in 3.8-rc for now, until/unless it gives wider trouble.
> >
> > But reverting from 3.7-stable soon would be a good idea, regressions
> > there being more tiresome.
> 
> I'm seeing iwlwifi performance problems in 3.8 as well, and have heard from
> several other saying the same thing. Testing with iperf shows very little data
> getting through most of the time.
> 
> Reverting f590dcec944552f9a4a61155810f3abd17d6465d on top of 3.8-rc6
> seems to have eliminated the problems for me, so far at least. I'll request some
> testing from others as well.
> 
> Seth

So the revert patch is on its way: http://git.kernel.org/?p=linux/kernel/git/davem/net.git;a=commit;h=ae023b2795d36f0f077e157428eb7eafa29ee412

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