From: Roland Dreier <rdreier@cisco.com>
To: "Bryan O'Sullivan" <bos@pathscale.com>
Cc: rolandd@cisco.com, gregkh@suse.de, akpm@osdl.org,
davem@davemloft.net, linux-kernel@vger.kernel.org,
openib-general@openib.org
Subject: Re: [PATCH 7 of 20] ipath - misc driver support code
Date: Thu, 09 Mar 2006 15:36:34 -0800 [thread overview]
Message-ID: <adaveundwcd.fsf@cisco.com> (raw)
In-Reply-To: <1141946942.10693.36.camel@serpentine.pathscale.com> (Bryan O'Sullivan's message of "Thu, 09 Mar 2006 15:29:02 -0800")
Bryan> It's purely a performance optimisation. Since we tune very
Bryan> closely to each CPU, there's no point right now in
Bryan> sort-of-tuning for a CPU that doesn't yet exist :-)
I thought that if ipath_unordered_wc() returns false then you assume
the writes through a WC mapping go in order. If Via behaves like
Intel and reorders writes, but ipath_unordered_wc() returns false,
then won't your driver break in a subtle way?
- R.
next prev parent reply other threads:[~2006-03-09 23:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2f16f504dd4b98c2ce7c.1141922820@localhost.localdomain>
2006-03-09 23:11 ` [PATCH 7 of 20] ipath - misc driver support code Roland Dreier
2006-03-09 23:27 ` Bryan O'Sullivan
2006-03-09 23:13 ` Roland Dreier
2006-03-09 23:29 ` Bryan O'Sullivan
2006-03-09 23:36 ` Roland Dreier [this message]
2006-03-10 19:23 ` Bryan O'Sullivan
2006-03-10 0:35 [PATCH 0 of 20] [RFC] ipath driver - another round for review Bryan O'Sullivan
2006-03-10 0:35 ` [PATCH 7 of 20] ipath - misc driver support code Bryan O'Sullivan
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