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From: "David S. Miller" <davem@redhat.com>
To: hugh@veritas.com
Cc: akpm@digeo.com, dmccr@us.ibm.com, riel@conectiva.com.br,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] flush_cache_page while pte valid
Date: Mon, 11 Nov 2002 22:53:33 -0800 (PST)	[thread overview]
Message-ID: <20021111.225333.122204472.davem@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0211120648170.1427-100000@localhost.localdomain>

   From: Hugh Dickins <hugh@veritas.com>
   Date: Tue, 12 Nov 2002 06:53:04 +0000 (GMT)
   
   Thanks for shedding light on that; but I'm still wondering if there
   might be data loss if userspace modifies the page in the tiny window
   between correctly positioned flush_cache_page and pte invalidation?

The flush merely writes back the data, a copy-back operation, fully L2
cache coherent.  All cpus will see correct data if an intermittant
store occurs.

  reply	other threads:[~2002-11-12  6:48 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-11-11 18:25 Hugh Dickins
2002-11-11 18:35 ` Andrew Morton
2002-11-11 23:19 ` David S. Miller
2002-11-11 23:34   ` [PATCH] [RFC] increase MAX_ADDR_LEN Roland Dreier
2002-11-11 23:38     ` David S. Miller
2002-11-11 23:58       ` Roland Dreier
2002-11-12  0:18       ` Alan Cox
2002-11-12  0:01         ` Roland Dreier
2002-11-12 14:23           ` Alan Cox
2002-11-12 14:20             ` Folkert van Heusden
2002-11-12 15:14             ` Roland Dreier
2002-11-12 16:00               ` Alan Cox
2002-11-12 15:50                 ` YOSHIFUJI Hideaki / 吉藤英明
2002-11-12 20:36                 ` Roland Dreier
2002-11-12 22:31                   ` David S. Miller
2002-11-12 22:39                     ` Roland Dreier
2002-12-04 18:31                     ` rtnetlink replacement for SIOCSIFHWADDR Roland Dreier
2002-12-04 20:11                       ` Andi Kleen
2002-12-31 23:11                         ` [PATCH] increase MAX_ADDR_LEN Roland Dreier
2003-01-06 15:52                           ` [PATCH] increase MAX_ADDR_LEN (resend) Roland Dreier
2003-01-06 23:29                             ` David S. Miller
2003-01-07  8:58                           ` [PATCH] increase MAX_ADDR_LEN David S. Miller
2002-11-12  6:53   ` [PATCH] flush_cache_page while pte valid Hugh Dickins
2002-11-12  6:53     ` David S. Miller [this message]
2002-11-12 14:49       ` Rik van Riel
2002-11-12 21:45         ` David S. Miller
2002-11-12 17:43       ` Hugh Dickins
2002-11-12 21:51         ` David S. Miller
2002-11-12 22:59           ` Hugh Dickins
2002-11-11 21:20 Manfred Spraul
2002-11-12  0:37 ` Russell King
2002-11-12  1:08 Ulrich Weigand
2002-11-12 20:53 Manfred Spraul
2002-11-12 22:01 ` David S. Miller
2002-11-12 21:32 Ulrich Weigand

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