[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20080219203226.746641000@polaris-admin.engr.sgi.com>
Date: Tue, 19 Feb 2008 12:32:26 -0800
From: Mike Travis <travis@....com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...e.hu>,
Thomas Gleixner <tglx@...utronix.de>, Andi Kleen <ak@...e.de>
Cc: Christoph Lameter <clameter@....com>,
Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Subject: [PATCH 0/2] percpu: Optimize percpu accesses v3
This is the generic (non-x86) changes for zero-based per cpu variables.
This patchset provides the following:
* Init: Move setup of nr_cpu_ids to as early as possible for usage
by early boot functions.
* Generic: Percpu infrastructure to rebase the per cpu area to zero
This provides for the capability of accessing the percpu variables
using a local register instead of having to go through a table
on node 0 to find this cpu specific offsets. It also would allow
atomic operations on percpu variables to reduce required locking.
* Introduces a new DEFINE_PER_CPU_FIRST to locate a percpu variable
(cpu_pda in this case) at the beginning of the percpu .data section.
Based on git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Signed-off-by: Christoph Lameter <clameter@....com>
Signed-off-by: Mike Travis <travis@....com>
---
v3: * split generic/x86-specific into two patches
v2: * rebased and retested using linux-2.6.git
* fixed errors reported by checkpatch.pl
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists