Re: [PATCH 19/21] mm: Convert i_mmap_lock and anon_vma->lock to mutexes

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To: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Subject: Re: [PATCH 19/21] mm: Convert i_mmap_lock and anon_vma->lock to mutexes
From: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Date: Tue, 30 Nov 2010 10:28:58 +0900 (JST)
Cc: kosaki.motohiro@xxxxxxxxxxxxxx, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, akpm@xxxxxxxxxxxxxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, David Miller <davem@xxxxxxxxxxxxx>, Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>, Mel Gorman <mel@xxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, Paul McKenney <paulmck@xxxxxxxxxxxxxxxxxx>, Yanmin Zhang <yanmin_zhang@xxxxxxxxxxxxxxx>, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
In-reply-to: <20101126145411.331356698@xxxxxxxxx>
List-id: <linux-arch.vger.kernel.org>

> Straight fwd conversion of i_mmap_lock and anon_vma->lock to mutexes.
> 
> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>

+1.

I don't think this conversion makes performance hurt.



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References:
- [PATCH 00/21] mm: Preemptibility -v6
  - From: Peter Zijlstra
- [PATCH 19/21] mm: Convert i_mmap_lock and anon_vma->lock to mutexes
  - From: Peter Zijlstra

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