From: Steve Wise <swise@opengridcomputing.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: randy.dunlap@oracle.com, linux-next@vger.kernel.org,
linux-kernel@vger.kernel.org, general@lists.openfabrics.org
Subject: Re: [ofa-general] [PATCH 2.6.30] RDMA/cxgb3: Remove modulo math.
Date: Wed, 11 Feb 2009 09:44:42 -0600 [thread overview]
Message-ID: <4992F26A.4030800@opengridcomputing.com> (raw)
In-Reply-To: <adamyctajv8.fsf@cisco.com>
Roland Dreier wrote:
> I'll roll this into the offending patch (that is in -next).
>
> But:
>
> > - wqe->recv.sgl[i].to = cpu_to_be64(((u32) wr->sg_list[i].addr) %
> > - (1UL << (12 + page_size[i])));
> > + wqe->recv.sgl[i].to = cpu_to_be64(((u64) wr->sg_list[i].addr) &
> > + ((1UL << (12 + page_size[i]))-1));
>
> Is this required? Strength reduction optimization should do this
> automatically (and the code has been there for quite a while, so
> obviously it isn't causing problems)
>
> - R.
>
Note that wr->sg_list[i].addr was being cast to a u32. That was wrong.
next prev parent reply other threads:[~2009-02-11 15:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-10 18:44 [ofa-general] [PATCH 2.6.30] RDMA/cxgb3: Remove modulo math Steve Wise
2009-02-10 19:04 ` [ofa-general] " Randy Dunlap
2009-02-10 19:10 ` Steve Wise
2009-02-10 19:12 ` Randy Dunlap
2009-02-11 0:38 ` [ofa-general] " Roland Dreier
2009-02-11 1:03 ` Steve Wise
[not found] ` <499223F8.1010204@opengridcomputing.com>
2009-02-11 1:07 ` David Miller
2009-02-11 1:18 ` Roland Dreier
2009-02-11 1:23 ` David Miller
2009-02-11 7:20 ` Roland Dreier
2009-02-11 8:00 ` David Miller
2009-02-11 15:44 ` Steve Wise [this message]
2009-02-11 18:12 ` Roland Dreier
2009-02-11 18:32 ` Steve Wise
2009-02-11 18:36 ` Roland Dreier
2009-02-11 18:44 ` Steve Wise
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