From: David Miller <davem@davemloft.net>
To: tj@kernel.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, benh@kernel.crashing.org, dhowells@redhat.com,
npiggin@suse.de, JBeulich@novell.com, cl@linux-foundation.org,
rusty@rustcorp.com.au, hpa@zytor.com, tglx@linutronix.de,
akpm@linux-foundation.org, x86@kernel.org, andi@firstfloor.org
Subject: Re: [PATCH 19/20] sparc64: use embedding percpu first chunk allocator
Date: Tue, 21 Jul 2009 20:54:19 -0700 (PDT) [thread overview]
Message-ID: <20090721.205419.251322907.davem@davemloft.net> (raw)
In-Reply-To: <1248171979-29166-20-git-send-email-tj@kernel.org>
From: Tejun Heo <tj@kernel.org>
Date: Tue, 21 Jul 2009 19:26:18 +0900
> sparc64 currently allocates a large page for each cpu and partially
> remap them into vmalloc area much like what lpage first chunk
> allocator did. As a 4M page is used for each cpu, this results in
> very large unit size and also adds TLB pressure due to the double
> mapping of pages in the first chunk.
>
> This patch converts sparc64 to use the embedding percpu first chunk
> allocator which now knows how to handle NUMA configurations. This
> simplifies the code a lot, doesn't incur any extra TLB pressure and
> results in better utilization of address space.
>
> Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
next prev parent reply other threads:[~2009-07-22 3:54 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-21 10:25 [PATCHSET percpu#for-next] implement and use sparse embedding first chunk allocator Tejun Heo
2009-07-21 10:25 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 01/20] percpu: fix pcpu_reclaim() locking Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 21:41 ` Christoph Lameter
2009-07-21 10:26 ` [PATCH 02/20] percpu: improve boot messages Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 21:43 ` Christoph Lameter
2009-07-21 10:26 ` [PATCH 03/20] percpu: rename 4k first chunk allocator to page Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 21:47 ` Christoph Lameter
2009-07-22 4:38 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 04/20] percpu: build first chunk allocators selectively Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 05/20] percpu: generalize first chunk allocator selection Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 06/20] percpu: drop @static_size from first chunk allocators Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 07/20] percpu: make @dyn_size mandatory for pcpu_setup_first_chunk() Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 08/20] percpu: add @align to pcpu_fc_alloc_fn_t Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 09/20] percpu: move pcpu_lpage_build_unit_map() and pcpul_lpage_dump_cfg() upward Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 10/20] percpu: introduce pcpu_alloc_info and pcpu_group_info Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 11/20] percpu: add pcpu_unit_offsets[] Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 12/20] percpu: add chunk->base_addr Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 13/20] vmalloc: separate out insert_vmalloc_vm() Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 14/20] vmalloc: implement pcpu_get_vm_areas() Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-08-14 6:07 ` Tejun Heo
2009-08-14 6:07 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 15/20] percpu: use group information to allocate vmap areas sparsely Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 16/20] percpu: update embedding first chunk allocator to handle sparse units Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 17/20] x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 18/20] percpu: kill lpage first chunk allocator Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 10:26 ` [PATCH 19/20] sparc64: use embedding percpu " Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-22 3:54 ` David Miller [this message]
2009-07-21 10:26 ` [PATCH 20/20] powerpc64: convert to dynamic percpu allocator Tejun Heo
2009-07-21 10:26 ` Tejun Heo
2009-07-21 12:22 ` [RFC PATCH] percpu: kill legacy " Tejun Heo
2009-07-21 12:22 ` Tejun Heo
2009-07-22 4:30 ` Rusty Russell
2009-08-14 6:09 ` [PATCHSET percpu#for-next] implement and use sparse embedding first chunk allocator Tejun Heo
2009-08-14 6:09 ` Tejun Heo
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