Re: Mainline kernel OLTP performance update

Pekka Enberg
2009-02-12T16:07:51Z

Hi Christoph,

On Thu, 12 Feb 2009, Zhang, Yanmin wrote:
>> ﻿The default order of ﻿kmalloc-8192 on 2*4 stoakley is an issue of calculate_order.
>>
>>
>> slab_size       order           name
>> -------------------------------------------------
>> 4096            3               sgpool-128
>> 8192            2               kmalloc-8192
>> 16384           3               kmalloc-16384
>>
>> ﻿kmalloc-8192's default order is smaller than ﻿sgpool-128's.

On Thu, Feb 12, 2009 at 5:25 PM, Christoph Lameter
<cl@linux-foundation.org> wrote:
> You reverted the page allocator passthrough patch before this right?
> Otherwise kmalloc-8192 should not exist and allocation calls for 8192
> bytes would be converted inline to request of an order 1 page from the
> page allocator.

Yup, I assume that's the case here.