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Re: missing flush_dcache_page call in 2.4 kernel

To: Peter Horton <>
Subject: Re: missing flush_dcache_page call in 2.4 kernel
From: "Maciej W. Rozycki" <>
Date: Fri, 26 Mar 2004 20:27:51 +0100 (CET)
Cc: Atsushi Nemoto <>,,
In-reply-to: <20040326184317.GA3661@skeleton-jack>
Organization: Technical University of Gdansk
Original-recipient: rfc822;
References: <> <> <> <> <20040326184317.GA3661@skeleton-jack>
On Fri, 26 Mar 2004, Peter Horton wrote:

> > I'm quite sure that it's a kernel bug and may cause problems if any
> > PIO block device (PIO ide, ide-cs, mtdblock, etc.) are used on CPUs
> > which have d-cache aliases (not only MIPS).  We need a correct fix ...
> True. A proper fix would flush the relevant page after PIO transfers
> into the page cache / swap pages. Unfortunately this would require a
> hook in the generic kernel.

 Why is it unfortunate?  A bug in generic code deserves a fix just like 
any other.

+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+        e-mail:, PGP key available        +

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