From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 071DFC4CED1 for ; Fri, 4 Oct 2019 16:11:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D1580222BE for ; Fri, 4 Oct 2019 16:11:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="EkqNdgLs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390241AbfJDQL2 (ORCPT ); Fri, 4 Oct 2019 12:11:28 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:47920 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389835AbfJDQL1 (ORCPT ); Fri, 4 Oct 2019 12:11:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ZigWl2XUxD4WRWUTA/3vfeUpk5NKCjS7IgLz46LNi1A=; b=EkqNdgLsMbx9rbnh1JuxQuReh yRNVUJ1YJDniW5TezYjNLj3ilThtLq4Bpl88bvH52e9Er9kCbV9gYeSg0V+KvsKlXaYMTUI/WzYu5 VNr4ttDz/d035oI+SGcxoX/pfDk/2oTt0MhE2pPNHylHOkgsUDgk3JIflBOLCsAPbG2Hpmzc5gpie PRzhtO2erK6rrkURbtZ3JbFPrmtd9Cyxb6TIvJEe3gDp+Fh6VeTEuELAO3wx3+4t7xlGPkmyWBMnG N77irQsP1EsOTNQFt5GHQ88feVuqiQoY5qTDP0stlPw5Tru7McoZC66pd1WwRXgPjp8NcteHPHgl+ z2FZn43kQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.2 #3 (Red Hat Linux)) id 1iGQAq-0001EE-V6; Fri, 04 Oct 2019 16:11:20 +0000 Date: Fri, 4 Oct 2019 09:11:20 -0700 From: Matthew Wilcox To: Wei Yang Cc: akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, jglisse@redhat.com, mike.kravetz@oracle.com, riel@surriel.com, khlebnikov@yandex-team.ru, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm/rmap.c: reuse mergeable anon_vma as parent when fork Message-ID: <20191004161120.GI32665@bombadil.infradead.org> References: <20191004160632.30251-1-richardw.yang@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191004160632.30251-1-richardw.yang@linux.intel.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Oct 05, 2019 at 12:06:32AM +0800, Wei Yang wrote: > After this change, kernel build test reduces 20% anon_vma allocation. But does it have any effect on elapsed time or peak memory consumption?