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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1422923185.14964.2.camel@stgolabs.net>
Date:	Mon, 02 Feb 2015 16:26:25 -0800
From:	Davidlohr Bueso <dave@...olabs.net>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mel Gorman <mgorman@...e.de>, 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, 2015-02-02 at 14:35 -0800, Andrew Morton wrote:
> 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);

Ebizzy adds a time based loop in there. But yeah, pretty much a standard
pthread model.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/