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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Alex Thorlton <athorlton@sgi.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Mel Gorman <mgorman@suse.de>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
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        David Howells <dhowells@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
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        linux-kernel@vger.kernel.org
In-Reply-To: <20130802194659.GP26476@sgi.com>
References: <20130802194659.GP26476@sgi.com>
Subject: RE: [PATCH] Add per-process flag to control thp
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Date: Fri,  2 Aug 2013 23:13:01 +0300 (EEST)
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Alex Thorlton wrote:
> This patch implements functionality to allow processes to disable the use of
> transparent hugepages through the prctl syscall.
> 
> We've determined that some jobs perform significantly better with thp disabled,
> and we need a way to control thp on a per-process basis, without relying on
> madvise.

What kind of workloads are you talking about?

What's wrong with madvise? Could you elaborate?

And I think thp_disabled should be reset to 0 on exec.

-- 
 Kirill A. Shutemov
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