From: David Miller <davem@davemloft.net>
To: eli@dev.mellanox.co.il
Cc: roland@purestorage.com, netdev@vger.kernel.org
Subject: Re: [PATCH 13/17] mlx4: Add blue flame support for kernel consumers
Date: Mon, 07 Mar 2011 13:49:31 -0800 (PST) [thread overview]
Message-ID: <20110307.134931.232736253.davem@davemloft.net> (raw)
In-Reply-To: <20110307214812.GA19540@mtldesk30>
From: Eli Cohen <eli@dev.mellanox.co.il>
Date: Mon, 7 Mar 2011 23:48:12 +0200
> On Mon, Mar 07, 2011 at 01:40:01PM -0800, David Miller wrote:
>> From: Eli Cohen <eli@dev.mellanox.co.il>
>> Date: Mon, 7 Mar 2011 23:36:48 +0200
>>
>> > Specifically, some archs may not support write combining.
>>
>> They should just create a non-write-combining mapping if they
>> don't support it.
>>
>
> I wouldn't expect that since the caller function could be mislead to
> believe it has a write combining capable area.
It's a performance optimization, if you don't get write combining you'll
get more strict ordering, rather than less.
It cannot cause problem.
next prev parent reply other threads:[~2011-03-07 21:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CFE9BFE80FFE4D4892AA5D31387E310F02F3ED@mtldag01.mtl.com>
2011-03-07 21:36 ` FW: [PATCH 13/17] mlx4: Add blue flame support for kernel consumers Eli Cohen
2011-03-07 21:40 ` David Miller
2011-03-07 21:48 ` Eli Cohen
2011-03-07 21:49 ` David Miller [this message]
2011-03-07 21:50 ` David Miller
2011-03-07 21:58 ` Eli Cohen
2011-03-07 22:09 ` David Miller
2011-03-07 10:17 Yevgeny Petrilin
2011-03-07 21:07 ` Roland Dreier
2011-03-07 21:27 ` David Miller
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