Re: [patch 09/10] Remove the SLOB allocator for 2.6.23

[Nick Piggin]

Pekka J Enberg wrote:

> Curious, /proc/meminfo immediately after boot shows:
>
> SLUB (debugging enabled):
>
> (none):~# cat /proc/meminfo 
> MemTotal:        30260 kB
> MemFree:         22096 kB
>
> SLUB (debugging disabled):
>
> (none):~# cat /proc/meminfo 
> MemTotal:        30276 kB
> MemFree:         22244 kB
>
> SLOB:
>
> (none):~# cat /proc/meminfo 
> MemTotal:        30280 kB
> MemFree:         22004 kB
>
> That's 92 KB advantage for SLUB with debugging enabled and 240 KB when 
> debugging is disabled.

Interesting. What kernel version are you using?


> Nick, Matt, care to retest SLUB and SLOB for your setups?

I don't think there has been a significant change in the area of
memory efficiency in either since I last tested, and Christoph and
I both produced the same result.

I can't say where SLOB is losing its memory, but there are a few
places that can still be improved, so I might get keen and take
another look at it once all the improvements to both allocators
gets upstream.

--
SUSE Labs, Novell Inc.
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