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SubjectRe: [PATCH 2/6] thp: optimize away unnecessary page table locking
On Wed,  8 Feb 2012 10:51:38 -0500
Naoya Horiguchi <> wrote:

> Currently when we check if we can handle thp as it is or we need to
> split it into regular sized pages, we hold page table lock prior to
> check whether a given pmd is mapping thp or not. Because of this,
> when it's not "huge pmd" we suffer from unnecessary lock/unlock overhead.
> To remove it, this patch introduces a optimized check function and
> replace several similar logics with it.
> Signed-off-by: Naoya Horiguchi <>
> Cc: David Rientjes <>

I prefer 'bool' for return type..but seems much better.

Thank you. I think this clean up is very good.

Reviewed-by: KAMEZAWA Hiroyuki <>

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