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Date: Thu, 19 Aug 2004 10:56:43 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Lee Revell <rlrevell@joe-job.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       Thomas Charbonnel <thomas@undata.org>,
       Florian Schmidt <mista.tapas@gmx.net>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>,
       William Lee Irwin III <wli@holomorphy.com>
Subject: Re: [patch] voluntary-preempt-2.6.8.1-P4
Message-ID: <20040819085643.GA4751@elte.hu>
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> > > Any comments on the unmap_vmas issue?
> > 
> > wli indicated he's working on the pagetable zapping critical section
> > issue - wli?

actually - the unmap_vmas() issue might be different. Could you change
the '32' in this part of mm/memory.c:

# define ZAP_BLOCK_SIZE \
                (voluntary_preemption ? (32 * PAGE_SIZE) : __ZAP_BLOCK_SIZE)

to 16? Does that roughly halve the ~180 usec latency?

	Ingo