linux-kernel - Re: [PATCH 28/35] radix: move radix init early

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Message-ID: <4B71FACB.9040504@kernel.org>
Date:	Tue, 09 Feb 2010 16:16:11 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 28/35] radix: move radix init early

On 02/09/2010 11:56 AM, Pekka Enberg wrote:
> On Tue, Feb 9, 2010 at 9:49 PM, Andrew Morton <akpm@...ux-foundation.org> wrote:
>> On Tue, 09 Feb 2010 11:32:39 -0800
>> Yinghai Lu <yinghai@...nel.org> wrote:
>>
>>> prepare to use it in early_irq_init()
>>>
>>> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
>>> ---
>>>  init/main.c |    2 +-
>>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/init/main.c b/init/main.c
>>> index 4cb47a1..8451878 100644
>>> --- a/init/main.c
>>> +++ b/init/main.c
>>> @@ -584,6 +584,7 @@ asmlinkage void __init start_kernel(void)
>>>               local_irq_disable();
>>>       }
>>>       rcu_init();
>>> +     radix_tree_init();
>>>       /* init some links before init_ISA_irqs() */
>>>       early_irq_init();
>>>       init_IRQ();
>>> @@ -657,7 +658,6 @@ asmlinkage void __init start_kernel(void)
>>>       proc_caches_init();
>>>       buffer_init();
>>>       key_init();
>>> -     radix_tree_init();
>>>       security_init();
>>>       vfs_caches_init(totalram_pages);
>>>       signals_init();
>>
>> Probably OK.  Note that radix_tree_init() uses slab, and it is now being
>> called before the kernel has run kmem_cache_init_late().  So please
>> ensure that this code was tested with CONFIG_SLAB=y.
> 
> That should be fine but yeah, definitely needs to be tested.

tested with x86 bit with CONFIG_SLAB=y, and it works.

YH
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