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[Xen-devel] Re: [PATCH] fix pgd_lock deadlock

from [Ingo Molnar] [Permanent Link][Original]
To: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH] fix pgd_lock deadlock
From: Ingo Molnar <mingo@xxxxxxx>
Date: Wed, 16 Feb 2011 21:15:24 +0100
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "Xen-devel@xxxxxxxxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx>, Andi Kleen <ak@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Johannes Weiner <jweiner@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Larry Woodman <lwoodman@xxxxxxxxxx>
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* Andrea Arcangeli <aarcange@xxxxxxxxxx> wrote:

> Ok sorry, but whenever I'm asked if I tested my patch with lockdep, I think 
> if it 
> was tested for other bugs, not to remove debug code overlapping with some 
> lockdep 
> feature.

ah, ok. The thing is, if it was only a single VM_BUG_ON() then it wouldnt be a 
big 
deal. Seven seems excessive - especially since we have that very check via 
lockdep.

Thanks for removing them!

        Ingo

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