From: Borislav Petkov <bp@alien8.de>
To: Chris Bainbridge <chris.bainbridge@gmail.com>
Cc: linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org,
mchehab@infradead.org, markus@trippelsdorf.de,
tony.luck@intel.com
Subject: Re: [BUG] packet loss with PROVE_LOCKING, bisected to EDAC fix
Date: Tue, 22 Mar 2016 12:12:22 +0100 [thread overview]
Message-ID: <20160322111222.GC3688@pd.tnic> (raw)
In-Reply-To: <20160322091656.GA11313@localhost>
On Tue, Mar 22, 2016 at 09:16:56AM +0000, Chris Bainbridge wrote:
> Good question. The patch looks pretty innocuous but it is for a lockdep
> issue and the bug only appears when lockdep config options are enabled.
> Could it somehow have broken a lock used to synchronise packet rx?
How? EDAC and net don't have anything in common...
> Reverting over 4.5 does fix the packet loss issue.
Peter makes sense to me. If he's right, if you build a kernel with
CONFIG_EDAC=n and PROVE_LOCKING=y and do your test again, you should
be seeing that packet loss again... because EDAC with the fix won't be
there to disable lockdep.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
prev parent reply other threads:[~2016-03-22 11:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 21:42 [BUG] packet loss with PROVE_LOCKING, bisected to EDAC fix Chris Bainbridge
2016-03-22 5:31 ` Borislav Petkov
2016-03-22 8:18 ` Peter Zijlstra
2016-03-22 9:16 ` Chris Bainbridge
2016-03-22 11:12 ` Borislav Petkov [this message]
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