From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <3966087C.D4D9E74E@colorfullife.com>
Date: Fri, 07 Jul 2000 18:42:36 +0200
From: Manfred Spraul <manfred@colorfullife.com>
MIME-Version: 1.0
Subject: Re: sys_exit() and zap_page_range()
References: <3965EC8E.5950B758@uow.edu.au>
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Sender: owner-linux-mm@kvack.org
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To: Andrew Morton <andrewm@uow.edu.au>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>
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Andrew Morton wrote:
> 
> Can anyone suggest a simple, clean way of decreasing zap_page_range's
> scheduling latency, in a way which you're prepared to support?
> 
Btw, zap_page_range() contains a huge TLB flush race: the freed pages
become available immediately to other processes, but stale tlb entries
are only flushed when zap_page_range() returns [check madvise_dontneed,
and several other functions]

A proper fix would be a major change, probably along Kanoj's proposal
(pte_freeze_range).

--
	Manfred
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