From: NIIBE Yutaka <gniibe@m17n.org>
To: Russell King <rmk@arm.linux.org.uk>
Cc: marcelo@conectiva.com.br (Marcelo Tosatti),
torvalds@transmeta.com (Linus Torvalds),
alan@lxorguk.ukuu.org.uk (Alan Cox),
linux-kernel@vger.kernel.org (lkml)
Subject: Re: [PATCH] swapin flush cache bug
Date: Tue, 13 Feb 2001 19:53:11 +0900 (JST) [thread overview]
Message-ID: <200102131053.TAA11808@mule.m17n.org> (raw)
In-Reply-To: <200102130950.f1D9ohq01768@flint.arm.linux.org.uk>
In-Reply-To: <Pine.LNX.4.21.0102122107550.29855-100000@freak.distro.conectiva> <200102130950.f1D9ohq01768@flint.arm.linux.org.uk>
Russell King wrote:
> What was the problem? The old code seems to behave well on a virtual
> address indexed virtual address tagged cache.
My case (SH-4) is: virtual address indexed, physical address tagged cache
(which has alias issue).
Suppose there's I/O to the physical page P asynchronously, and the
page is placed in the swap cache. It remains cache entry, say,
indexed kernel virtual address K. Then, process maps P at U. U and K
(may) indexes differently. The process will get the data from memory
(not the one in the cashe), if it's not flushed.
--
next prev parent reply other threads:[~2001-02-13 10:54 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-12 23:21 Marcelo Tosatti
2001-02-13 9:50 ` Russell King
2001-02-13 10:53 ` NIIBE Yutaka [this message]
2001-02-13 11:16 ` Russell King
2001-02-13 11:26 ` Alan Cox
2001-02-13 23:50 ` NIIBE Yutaka
2001-02-14 2:08 ` NIIBE Yutaka
2001-02-14 10:12 ` Marcelo Tosatti
2001-06-27 0:51 ` NIIBE Yutaka
2001-06-27 10:11 ` Marcelo Tosatti
2001-06-28 0:42 ` David S. Miller
2001-06-28 0:07 ` NIIBE Yutaka
2001-06-27 22:41 ` Marcelo Tosatti
2001-06-28 0:23 ` Stephen C. Tweedie
2001-06-28 0:47 ` David S. Miller
2001-06-28 1:10 ` David S. Miller
2001-06-29 14:18 ` NIIBE Yutaka
2001-07-02 22:47 ` Cache issues David S. Miller
2001-06-28 0:41 ` [PATCH] swapin flush cache bug NIIBE Yutaka
2001-06-28 1:04 ` NIIBE Yutaka
2001-07-02 11:23 ` Cache issues NIIBE Yutaka
2001-07-03 0:04 ` NIIBE Yutaka
2001-06-28 0:46 ` [PATCH] swapin flush cache bug David S. Miller
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