From: "David S. Miller" <davem@redhat.com>
To: NIIBE Yutaka <gniibe@m17n.org>
Cc: "Stephen C. Tweedie" <sct@redhat.com>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] swapin flush cache bug
Date: Wed, 27 Jun 2001 17:47:45 -0700 (PDT) [thread overview]
Message-ID: <15162.32433.598824.599520@pizda.ninka.net> (raw)
In-Reply-To: <200106280041.f5S0fDr05278@mule.m17n.org>
In-Reply-To: <200106270051.f5R0pkl19282@mule.m17n.org> <Pine.LNX.4.21.0106270710050.1291-100000@freak.distro.conectiva> <200106280007.f5S07qQ04446@mule.m17n.org> <20010628012349.L1554@redhat.com> <200106280041.f5S0fDr05278@mule.m17n.org>
NIIBE Yutaka writes:
> (2) Page got swapped in asynchronously, possibly by read-ahead
>
> Swap in
> [ Page ] <---- [ Disk ]
> K
>
> The I/O from disk goes through kernel virtual address K.
> We have cache entries indexed by K.
The I/O completion must flush the cache, not the VM subsystem.
You must implement cache flushing at the DMA tranfer end point
to fix the problem you are describing.
Later,
David S. Miller
davem@redhat.com
next prev parent reply other threads:[~2001-06-28 0:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-12 23:21 [PATCH] swapin flush cache bug Marcelo Tosatti
2001-02-13 9:50 ` Russell King
2001-02-13 10:53 ` NIIBE Yutaka
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 [this message]
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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