linux-kernel - RE: iwlwifi: regression in 3.8-rc4 and 3.7.3

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Date:	Sun, 20 Jan 2013 06:39:30 +0000
From:	"Grumbach, Emmanuel" <emmanuel.grumbach@...el.com>
To:	"sedat.dilek@...il.com" <sedat.dilek@...il.com>,
	Hugh Dickins <hughd@...gle.com>
CC:	"Berg, Johannes" <johannes.berg@...el.com>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: iwlwifi: regression in 3.8-rc4 and 3.7.3

> 
> On Sun, Jan 20, 2013 at 6:56 AM, Hugh Dickins <hughd@...gle.com> 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.
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).
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