From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262225AbVEROB1 (ORCPT ); Wed, 18 May 2005 10:01:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262222AbVEROAS (ORCPT ); Wed, 18 May 2005 10:00:18 -0400 Received: from mtagate4.de.ibm.com ([195.212.29.153]:19404 "EHLO mtagate4.de.ibm.com") by vger.kernel.org with ESMTP id S262206AbVERNyL (ORCPT ); Wed, 18 May 2005 09:54:11 -0400 Subject: [RFC/PATCH 5/5] madvice/fadvice: execute in place (V2) From: Carsten Otte Reply-To: cotte@freenet.de To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, schwidefsky@de.ibm.com, akpm@osdl.org In-Reply-To: <1116422644.2202.1.camel@cotte.boeblingen.de.ibm.com> References: <1116422644.2202.1.camel@cotte.boeblingen.de.ibm.com> Content-Type: text/plain Organization: IBM Deutschland Entwicklung Date: Wed, 18 May 2005 15:54:05 +0200 Message-Id: <1116424446.2202.20.camel@cotte.boeblingen.de.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org [RFC/PATCH 5/5] madvice/fadvice: execute in place (V2) This patch makes sys_madvice and sys_fadvice return 0 on advices to cache data assoctiated with files that do have get_xip_page. Since the data for those is in memory anyway, we can just ignore the advice... This patch is unchanged from previous version. Signed-off-by: Carsten Otte --- diff -ruN linux-git/mm/fadvise.c linux-git-xip/mm/fadvise.c --- linux-git/mm/fadvise.c 2005-05-17 14:23:36.000000000 +0200 +++ linux-git-xip/mm/fadvise.c 2005-05-17 20:16:40.000000000 +0200 @@ -43,6 +43,10 @@ goto out; } + if (mapping->a_ops->get_xip_page) + /* no bad return value, but ignore advice */ + goto out; + /* Careful about overflows. Len == 0 means "as much as possible" */ endbyte = offset + len; if (!len || endbyte < len) diff -ruN linux-git/mm/madvise.c linux-git-xip/mm/madvise.c --- linux-git/mm/madvise.c 2005-05-17 14:23:36.000000000 +0200 +++ linux-git-xip/mm/madvise.c 2005-05-17 20:16:40.000000000 +0200 @@ -65,6 +65,10 @@ if (!file) return -EBADF; + if (file->f_mapping->a_ops->get_xip_page) + /* no bad return value, but ignore advice */ + return 0; + start = ((start - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; if (end > vma->vm_end) end = vma->vm_end;