From: Ralf Baechle <ralf@oss.sgi.com>
To: Dominic Sweetman <dom@algor.co.uk>
Cc: Atsushi Nemoto <nemoto@toshiba-tops.co.jp>,
linux-mips@oss.sgi.com, linux-mips@fnet.fr
Subject: Re: SysV IPC shared memory and virtual alising
Date: Tue, 14 Aug 2001 10:24:52 +0200 [thread overview]
Message-ID: <20010814102452.E5928@bacchus.dhis.org> (raw)
In-Reply-To: <15214.23110.345236.934305@gladsmuir.algor.co.uk>; from dom@algor.co.uk on Mon, Aug 06, 2001 at 09:50:14AM +0100
On Mon, Aug 06, 2001 at 09:50:14AM +0100, Dominic Sweetman wrote:
> > Here is an patch to fix virtual aliasing problem with SysV IPC
> > shared memory. I tested this patch on a r4k cpu with 32Kb D-cache.
> >
> > If D-cache is smaller than PAGE_SIZE this patch is not needed at
> > all...
>
> More precisely, if the size of a D-cache "set" is smaller than
> PAGE_SIZE. So a CPU with a 16Kbyte 4-way set-associative cache and
> 4Kbyte PAGE_SIZE is safe.
Or is physically indexed and physically tagged or magically deals with
aliasing such as R4000 / R4400 SC and MC versions or R10000, R12000 or
R14000.
Ralf
next prev parent reply other threads:[~2001-08-14 9:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-06 7:44 SysV IPC shared memory and virtual alising Atsushi Nemoto
2001-08-06 8:50 ` Dominic Sweetman
2001-08-14 8:24 ` Ralf Baechle [this message]
2001-08-14 8:49 ` Ralf Baechle
2001-08-16 3:04 ` Atsushi Nemoto
2002-05-07 6:48 ` XSHM/shared-pixmap fix Was: Linux Shared Memory Issue Atsushi Nemoto
-- strict thread matches above, loose matches on Subject: below --
2002-04-24 21:27 Maurice Turcotte
2002-04-24 22:03 ` Jun Sun
2002-04-25 5:25 ` Atsushi Nemoto
2002-04-25 18:46 ` Jun Sun
2002-04-26 3:11 ` Atsushi Nemoto
2002-04-27 21:45 ` XSHM/shared-pixmap fix Was: " Florian Lohoff
2002-05-06 11:04 ` Maciej W. Rozycki
2002-04-25 15:36 ` Florian Lohoff
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