* Re: Transparent huge pages and shmem?
[not found] <CB1B361E45A85849902B25342E88900501F504CDD753@ABGEX70E.FSC.NET>
@ 2012-01-23 19:38 ` Hugh Dickins
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From: Hugh Dickins @ 2012-01-23 19:38 UTC (permalink / raw)
To: Borzenkov, Andrey; +Cc: linux-kernel, linux-mm
On Mon, 23 Jan 2012, Borzenkov, Andrey wrote:
> In case of THP enabled kernel - will THP be used for SysV shmem?
> The obvious target is to avoid pre-allocation of huge pages pool
> for databases like Oracle that is required today.
It will one day, yes. Various people are very interested in THP on
tmpfs/shmem, which serves SysV shm. But at present THP is limited to
private anonymous pages, and its extension to shared file pages is not
trivial. I have not heard of anyone making significant progress on
that as yet - but perhaps someone is working on it behind the scenes.
Hugh
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2012-01-23 19:38 ` Transparent huge pages and shmem? Hugh Dickins
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