From: Tejun Heo <tj@kernel.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
David Rientjes <rientjes@google.com>,
linux-mm@kvack.org
Subject: Re: [RFC] slub: Simplify boot kmem_cache_cpu allocations
Date: Wed, 16 Jun 2010 10:53:45 +0200 [thread overview]
Message-ID: <4C189119.5050801@kernel.org> (raw)
In-Reply-To: <alpine.DEB.2.00.1006151409240.10865@router.home>
Hello, Christoph.
On 06/15/2010 09:11 PM, Christoph Lameter wrote:
> Maybe this one can also be applied after the other patch?
>
> Tejun: Is it somehow possible to reliably use the alloc_percpu() on all
> platforms during early boot before the slab allocator is up?
Hmmm... first chunk allocation is done using bootmem, so if we give it
enough to room (for both chunk itself and alloc map) so that it can
serve till slab comes up, it should work fine. I think what's
important here is making up our minds and decide on how to order them.
If the order is well defined, things can be made to work one way or
the other. What happened to the get-rid-of-bootmem effort? Wouldn't
that also interact with this?
Thanks.
--
tejun
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next prev parent reply other threads:[~2010-06-16 8:54 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-15 19:07 slub: remove dynamic dma slab allocation Christoph Lameter
2010-06-15 19:11 ` [RFC] slub: Simplify boot kmem_cache_cpu allocations Christoph Lameter
2010-06-16 8:53 ` Tejun Heo [this message]
2010-06-16 16:33 ` Christoph Lameter
2010-06-16 17:18 ` Tejun Heo
2010-06-16 17:35 ` Christoph Lameter
2010-06-17 8:49 ` Tejun Heo
2010-06-17 9:01 ` Pekka Enberg
2010-06-17 13:43 ` Christoph Lameter
2010-06-18 16:58 ` [PATCH 1/2] percpu: make @dyn_size always mean min dyn_size in first chunk init functions Tejun Heo
2010-06-18 17:29 ` Christoph Lameter
2010-06-18 17:31 ` Christoph Lameter
2010-06-18 17:39 ` Tejun Heo
2010-06-18 18:03 ` Christoph Lameter
2010-06-19 8:23 ` Tejun Heo
2010-06-18 16:58 ` [PATCH 2/2] percpu: allow limited allocation before slab is online Tejun Heo
2010-06-18 22:30 ` slub: remove dynamic dma slab allocation David Rientjes
2010-06-21 14:25 ` Christoph Lameter
2010-06-21 19:56 ` David Rientjes
2010-06-21 20:32 ` Christoph Lameter
2010-06-21 21:08 ` David Rientjes
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