From: Ralf Baechle <ralf@linux-mips.org>
To: Bob Breuer <bbreuer@righthandtech.com>
Cc: linux-mips@linux-mips.org
Subject: Re: problems on D-cache alias in 2.4.22
Date: Tue, 18 May 2004 22:02:05 +0200 [thread overview]
Message-ID: <20040518200205.GC2454@linux-mips.org> (raw)
In-Reply-To: <B482D8AA59BF244F99AFE7520D74BF9609D4B3@server1.RightHand.righthandtech.com>
On Tue, May 18, 2004 at 01:17:38PM -0500, Bob Breuer wrote:
> Changing that same place also fixes my problem. However, I came across
> the mips cobalt patches and after applying a variation of the IDE cache
> fix from there, that also fixes the problem. So it would seem that this
> is the same problem as already fixed in the cobalt patch, but showing up
> on non-cobalt hardware.
>
> flush_page_to_ram() was made useless around the release of 2.4.21. I
> suspect that this was broken at that time, seeing how it is broken in
> 2.4.22 and 2.4.26. From browsing the debian-mips mailing list archives,
> it appears that they have not had a stable mips kernel since 2.4.19,
> could this bug be the cause? Are the recent Debian mips kernels still
> unstable?
>
> Would anyone with an unstable 2.4.2x kernel be willing to try one of the
> attached patches to see if the situation improves?
flush_page_to_ram has been deprecated since a long, long time and so it's
use in memory managment was no longer correct for all cases - MIPS was
basically the last major Linux architecture left using it. Replacing
it with flush_dcache_page fixed those correctness problem and delivered
a major speedup. So no sense in whining - flush_page_to_ram won't return.
Ralf
next prev parent reply other threads:[~2004-05-18 20:02 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-18 18:17 problems on D-cache alias in 2.4.22 Bob Breuer
2004-05-18 18:17 ` Bob Breuer
2004-05-18 18:45 ` Jun Sun
2004-05-18 19:10 ` Peter Horton
2004-05-18 19:50 ` Ralf Baechle
2004-05-18 18:24 ` Alan Cox
2004-05-18 21:21 ` Peter Horton
2004-05-18 22:25 ` Jun Sun
2004-05-18 23:29 ` Peter Horton
2004-05-18 20:02 ` Ralf Baechle [this message]
2004-05-18 20:10 ` Thiemo Seufer
-- strict thread matches above, loose matches on Subject: below --
2004-05-13 22:05 Bob Breuer
2004-05-13 22:05 ` Bob Breuer
2004-05-14 2:59 ` wuming
2004-05-14 7:52 ` Peter Horton
2004-05-15 0:12 ` Ralf Baechle
2004-05-15 12:31 ` Fuxin Zhang
2004-05-13 6:52 wuming
2004-05-14 7:45 ` Peter Horton
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