linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <547e3a3b.a45c8c0a.655b.0cbc@mx.google.com>
Date:	Tue, 2 Dec 2014 20:16:23 -0200
From:	Dâniel Fraga <fragabr@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: frequent lockups in 3.18rc4

On Tue, 2 Dec 2014 14:10:33 -0800
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> So it appears that you can recreate this much more quickly than DaveJ
> can recreate his issue.
> 
> The two issues may be entirely unrelated, but the it is certainly
> quite possible that they have some relation to each other, and the
> timing is intriguing, in that 3.17 seems to be the first kernel
> release this happened in.
> 
> So at this point I think I'd ask you to just go back to your bisection
> that you apparently already started earlier. I take it 3.16 worked
> fine, and that's what you used as the good base for your bisect?
> 
> Even if it's something else than what DaveJ sees (or perhaps
> *particularly* if it's something else), bisecting when it started
> would be very worthwhile.
> 
> There's 13k+ commits in between 3.16 and 3.17, so a full bisect should
> be around 15 test-points. But judging by the timing of your emails,
> you can generally reproduce this relatively quickly..

	No problem Linus. I'll try the full bisect and I post here
later with the final result.

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