Re: [PATCH 1/3] mm: completely disable THP by transparent_hugepage=never

[Cong Wang]

ä 2011å06æ21æ 03:43, Andrea Arcangeli åé:
> On Tue, Jun 21, 2011 at 01:01:17AM +0800, Cong Wang wrote:
> > Without this patch, THP is still initialized (although khugepaged is not started),
> > that is what I don't want to see when I pass "transparent_hugepage=never",
> > because "never" for me means THP is totally unseen, even not initialized.
>
> The ram saving by not registering in sysfs is not worth the loss of
> generic functionality. You can try to make the hash and slab
> khugepaged allocations more dynamic if you want to microoptimize for
> RAM usage, that I wouldn't be against if you find a way to do it
> simply and without much complexity (and .text) added. But likely there
> are other places to optimize that may introduce less tricks and would
> give you a bigger saving than ~8kbytes, it's up to you.

But the THP functionality is not going to be used.

Yeah, sounds reasonable, I will try to check if I can make it.

Thanks for pointing this out!
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