From: "Albert D. Cahalan" <acahalan@cs.uml.edu>
To: davem@redhat.com (David S. Miller)
Cc: dwmw2@infradead.org (David Woodhouse),
cw@f00f.org (Chris Wedgwood),
jgarzik@mandrakesoft.com (Jeff Garzik),
bjornw@axis.com, linux-kernel@vger.kernel.org,
linux-mtd@lists.infradead.org
Subject: Re: Missing cache flush.
Date: Wed, 6 Jun 2001 04:32:27 -0400 (EDT) [thread overview]
Message-ID: <200106060832.f568WR3253749@saturn.cs.uml.edu> (raw)
In-Reply-To: <15132.54565.311995.865807@pizda.ninka.net> from "David S. Miller" at Jun 05, 2001 05:48:37 AM
David S. Miller writes:
> David Woodhouse writes:
>>> Call it flush_ecache_full() or something.
>>
>> Strange name. Why? How about __flush_cache_range()?
>
> How about flush_cache_range_force() instead?
>
> I want something in the name that tells the reader "this flushes
> the caches, even though under every other ordinary circumstance
> you would not need to".
"flush" means what to you?
write-back
write-back-and-invalidate
discard-and-invalidate
All 3 behaviors are useful to me, and a few more. I've been
using chunks of PowerPC assembly. Using PowerPC mnemonics...
dcba -- allocate a cache block with undefined content
dcbf -- write to RAM, then invalidate ("data cache block flush")
dcbi -- invalidate, discarding any data
dcbst -- initiate write if dirty
dcbt -- prefetch, hinting about future load instructions
dcbtst -- prefetch, hinting about future store instructions
dcbz -- allocate and zero a cache block (cacheable mem only!)
So dcbf_range() and dcbi_range() sound good to me. :-)
next prev parent reply other threads:[~2001-06-06 8:33 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-04 23:16 Missing cache flush David Woodhouse
2001-06-04 23:23 ` Jeff Garzik
2001-06-04 23:29 ` David Woodhouse
2001-06-05 2:03 ` David S. Miller
2001-06-05 3:55 ` Chris Wedgwood
2001-06-05 5:28 ` Linus Torvalds
2001-06-05 6:49 ` Alan Cox
2001-06-05 8:29 ` Ingo Molnar
2001-06-05 15:10 ` Ralf Baechle
2001-06-05 8:46 ` David Woodhouse
2001-06-05 9:05 ` David Woodhouse
2001-06-05 12:42 ` David Woodhouse
2001-06-05 12:52 ` David Woodhouse
2001-06-05 12:48 ` David S. Miller
2001-06-06 8:32 ` Albert D. Cahalan [this message]
2001-06-06 19:48 ` Pavel Machek
2001-06-05 9:11 ` David S. Miller
2001-06-05 9:29 ` kira brown
2001-06-05 17:16 ` Alan Cox
2001-06-06 19:44 ` Earyly Cyrix CPUs was " Pavel Machek
2001-06-08 16:00 ` Alan Cox
2001-06-05 9:43 ` Johan Adolfsson
2001-06-05 8:50 ` David S. Miller
2001-06-05 17:01 ` Jamie Lokier
2001-06-05 23:24 ` Chris Wedgwood
2001-06-06 8:43 ` James Sutherland
2001-06-05 4:01 ` David S. Miller
2001-06-05 2:04 ` David S. Miller
2001-06-05 9:17 ` Bjorn Wesen
2001-06-05 12:57 ` Chris Wedgwood
2001-06-05 15:17 ` Ralf Baechle
2001-06-05 17:41 ` Daniel Phillips
2001-06-05 14:22 ` Vipin Malik
2001-06-05 14:40 ` Chris Wedgwood
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