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Re: locking question: do_mmap(), do_munmap()

To: Ralf Baechle <ralf@oss.sgi.com>
Subject: Re: locking question: do_mmap(), do_munmap()
From: Dominic Sweetman <dom@algor.co.uk>
Date: Tue, 19 Oct 1999 08:34:30 +0100 (GMT/BST)
Cc: Kanoj Sarcar <kanoj@google.engr.sgi.com>, linux@cthulhu.engr.sgi.com, linux-mips@fnet.fr, linux-mips@vger.rutgers.edu
In-reply-to: <19991018103733.B3047@uni-koblenz.de>
References: <19991015115816.B948@uni-koblenz.de> <199910151750.KAA99441@google.engr.sgi.com> <19991018103733.B3047@uni-koblenz.de>
Ralf,

> (On the R3000 which allows swapping of i-cache and d-cache for
> diagnostic purposes it actually is possible to have dirty lines in
> the d-cache when it's used as the i-cache...

Not really; the R3000 caches were always write-through, so the 
d-cache can never be dirty and in fact has exactly the same possible
states as the i-cache.

> But that's not a consideration for Linux.)

Well, OK then.

Dominic Sweetman
dom@algor.co.uk

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