linux-kernel - Re: [PATCH 0/4] munmap: Flexible mem unmap operation interface for scheduling latency

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Message-ID: <1303760837.4865.22.camel@laptop>
Date:	Mon, 25 Apr 2011 21:47:17 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Geunsik Lim <leemgs1@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Hugh Dickins <hughd@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Darren Hart <dvhart@...ux.intel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH 0/4] munmap: Flexible mem unmap operation interface for
 scheduling latency

On Mon, 2011-04-25 at 19:44 +0900, Geunsik Lim wrote:
>     Originally, We aim to not hold locks for too long (for scheduling latency reasons).
>     So zap pages in ZAP_BLOCK_SIZE byte counts.
>     This means we need to return the ending mmu_gather to the caller.

Please have a look at the mmu_gather rewrite that hit -mm last week,
that completely does away with ZAP_BLOCK_SIZE and renders these patches
obsolete.

Also, -rt doesn't care since it already has preemptible mmu_gather.

Furthermore:

> +L:     linux-rt-users@...r.kernel.org

is complete crap, linux-rt-users is _NOT_ a development list.

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