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List:       linux-kernel
Subject:    Re: [patch] voluntary-preempt-2.6.8.1-P4
From:       Ingo Molnar <mingo () elte ! hu>
Date:       2004-08-19 8:56:43
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
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