linux-kernel - Re: [RFC PATCH] mm: madvise: Ignore repeated MADV

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Date:	Mon, 2 Feb 2015 14:35:41 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Mel Gorman <mgorman@...e.de>
Cc:	linux-mm@...ck.org, Minchan Kim <minchan@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] mm: madvise: Ignore repeated MADV_DONTNEED hints

On Mon, 2 Feb 2015 22:18:24 +0000 Mel Gorman <mgorman@...e.de> wrote:

> > Is there something
> > preventing this from being addressed within glibc?
>  
> I doubt it other than I expect they'll punt it back and blame either the
> application for being stupid or the kernel for being slow.

*Is* the application being stupid?  What is it actually doing? 
Something like

pthread_routine()
{
	p = malloc(X);
	do_some(work);
	free(p);
	return;
}

?

If so, that doesn't seem stupid?
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