From: "David S. Miller" <davem@redhat.com>
To: tony.luck@intel.com
Cc: lse-tech@lists.sourceforge.net, nitin.a.kamble@intel.com,
linux-kernel@vger.kernel.org, tomlins@cam.org, akpm@digeo.com,
mbligh@aracnet.com
Subject: Re: [Lse-tech] [RFC] numa slab for 2.5.41-mm1
Date: Tue, 08 Oct 2002 17:50:04 -0700 (PDT) [thread overview]
Message-ID: <20021008.175004.73372438.davem@redhat.com> (raw)
In-Reply-To: <39B5C4829263D411AA93009027AE9EBB1EF28EFB@fmsmsx35.fm.intel.com>
From: "Luck, Tony" <tony.luck@intel.com>
Date: Tue, 8 Oct 2002 16:29:45 -0700
If ptr_to_nodeid() is made a platform dependent function, then
there are some platforms that can do this very efficiently (since
the nodeid is embedded in some of the high-order address bits), and
some for which this is complex (e.g. platforms that concatenate
memory from each node).
I suggest to do it like this, provide the portable version unless some
"HAVE_ARCH_PTR_TO_NODEID" CCP macro is defined in which case the
architecture can make the "address bits" optimization or similar.
The is how we usually handle such things.
prev parent reply other threads:[~2002-10-09 0:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-08 23:29 Luck, Tony
2002-10-08 23:34 ` Martin J. Bligh
2002-10-09 0:50 ` David S. Miller [this message]
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