Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757508Ab2FVO3o (ORCPT ); Fri, 22 Jun 2012 10:29:44 -0400 Received: from Mycroft.westnet.com ([216.187.52.7]:53350 "EHLO mycroft.westnet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753286Ab2FVO3n (ORCPT ); Fri, 22 Jun 2012 10:29:43 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <20452.32826.165122.958868@quad.stoffel.home> Date: Fri, 22 Jun 2012 10:24:58 -0400 From: "John Stoffel" To: Rik van Riel Cc: linux-mm@kvack.org, akpm@linux-foundation.org, aarcange@redhat.com, peterz@infradead.org, minchan@gmail.com, kosaki.motohiro@gmail.com, andi@firstfloor.org, hannes@cmpxchg.org, mel@csn.ul.ie, linux-kernel@vger.kernel.org Subject: Re: [PATCH -mm v2 00/11] mm: scalable and unified arch_get_unmapped_area In-Reply-To: <1340315835-28571-1-git-send-email-riel@surriel.com> References: <1340315835-28571-1-git-send-email-riel@surriel.com> X-Mailer: VM 8.1.2 under 23.2.1 (x86_64-pc-linux-gnu) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 756 Lines: 22 >>>>> "Rik" == Rik van Riel writes: Rik> A long time ago, we decided to limit the number of VMAs per Rik> process to 64k. As it turns out, there actually are programs Rik> using tens of thousands of VMAs. Rik> Performance Rik> Testing performance with a benchmark that allocates tens Rik> of thousands of VMAs, unmaps them and mmaps them some more Rik> in a loop, shows promising results. How are the numbers for applications which only map a few VMAs? Is there any impact there? John -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/