linux-kernel - Re: [RFC PATCH] Fix aio performance regression for database caused by THP

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Message-ID: <8738qakatu.fsf@tassilo.jf.intel.com>
Date:	Thu, 15 Aug 2013 12:34:05 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Khalid Aziz <khalid.aziz@...cle.com>
Cc:	aarcange@...hat.com, akpm@...ux-foundation.org, hannes@...xchg.org,
	mgorman@...e.de, riel@...hat.com, minchan@...nel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] Fix aio performance regression for database caused by THP

Khalid Aziz <khalid.aziz@...cle.com> writes:

> I am working with a tool that simulates oracle database I/O workload.
> This tool (orion to be specific -
> <http://docs.oracle.com/cd/E11882_01/server.112/e16638/iodesign.htm#autoId24>)
> allocates hugetlbfs pages using shmget() with SHM_HUGETLB flag. 

Is this tool available for download?

I would rather prefer to address the locking overhead in THP too.

The fundamental problem is that we have to touch all the pages?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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