From: Jeff Garzik <jeff@garzik.org>
To: Michael Buesch <mb@bu3sch.de>
Cc: Roland Dreier <rdreier@cisco.com>,
Andi Kleen <andi@firstfloor.org>,
ggrundstrom@neteffect.com, ewg@lists.openfabrics.org,
netdev@vger.kernel.org
Subject: Re: [PATCH 2/14] nes: device structures and defines
Date: Wed, 08 Aug 2007 12:59:08 -0400 [thread overview]
Message-ID: <46B9F65C.9060906@garzik.org> (raw)
In-Reply-To: <200708081843.36370.mb@bu3sch.de>
Michael Buesch wrote:
> writel doesn't guarantee flushing either.
> readl does.
Not quite -- there are multiple kinds of flushing. You're thinking
about flushing across PCI bridges, which is correct, but you also have
CPU write posting and CPU write ordering and such.
Without taking all that into account, you might be tempted to think that
__raw_readl() will perform all flushes necessary following a
__raw_writel() -- but that would be incorrect.
Jeff
next prev parent reply other threads:[~2007-08-08 16:59 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-08 0:45 [PATCH 2/14] nes: device structures and defines ggrundstrom
2007-08-08 1:13 ` Jeff Garzik
2007-08-08 12:38 ` Andi Kleen
2007-08-08 11:50 ` Michael Buesch
2007-08-08 12:55 ` Andi Kleen
2007-08-08 13:02 ` Michael Buesch
2007-08-08 13:08 ` Andi Kleen
2007-08-08 13:28 ` Michael Buesch
2007-08-08 13:38 ` Andi Kleen
2007-08-08 13:48 ` Michael Buesch
2007-08-08 13:55 ` Michael Buesch
2007-08-08 16:18 ` Roland Dreier
2007-08-08 16:25 ` Jeff Garzik
2007-08-08 16:30 ` Michael Buesch
2007-08-08 16:33 ` Jeff Garzik
2007-08-08 16:43 ` Michael Buesch
2007-08-08 16:46 ` Roland Dreier
2007-08-08 16:57 ` akepner
2007-08-08 16:59 ` Jeff Garzik [this message]
2007-08-08 17:34 ` Michael Buesch
2007-08-08 19:40 ` Jeff Garzik
2007-08-08 16:39 ` Roland Dreier
2007-08-08 16:19 ` Jeff Garzik
2007-08-08 22:04 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=46B9F65C.9060906@garzik.org \
--to=jeff@garzik.org \
--cc=andi@firstfloor.org \
--cc=ewg@lists.openfabrics.org \
--cc=ggrundstrom@neteffect.com \
--cc=mb@bu3sch.de \
--cc=netdev@vger.kernel.org \
--cc=rdreier@cisco.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.