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SubjectRe: [PATCH] Document huge memory/cache overhead of memory controller in Kconfig
KAMEZAWA Hiroyuki wrote:
> On Thu, 21 Feb 2008 16:33:33 +0530
> Balbir Singh <> wrote:
>>> Another issue is that it will slightly increase TLB/cache
>>> cost of the memory controller, but I think that would be a fair
>>> trade off for it being zero cost when disabled but compiled
>>> in.
>>> Doing it with vmalloc should be easy enough. I can do such
>>> a patch later unless someone beats me to it...
>> I'll get to it, but I have too many things on my plate at the moment. KAMEZAWA
>> also wanted to look at it. I looked through some vmalloc() internals yesterday
>> and I am worried about allocating all the memory on a single node in a NUMA
>> system and changing VMALLOC_XXXX on every architecture to provide more vmalloc
>> space. I might be missing something obvious.
> I'll post a series of patch to do that later (it's under debug now...)
> I'm glad if people (including you) look it and give me advices.

Thank you so much for your help. I'll definitely look at it and review/test them.

Warm Regards,
Balbir Singh
Linux Technology Center

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