Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262846AbVAFOtv (ORCPT ); Thu, 6 Jan 2005 09:49:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262847AbVAFOtv (ORCPT ); Thu, 6 Jan 2005 09:49:51 -0500 Received: from mail.mellanox.co.il ([194.90.237.34]:45758 "EHLO mtlex01.yok.mtl.com") by vger.kernel.org with ESMTP id S262846AbVAFOt1 (ORCPT ); Thu, 6 Jan 2005 09:49:27 -0500 Date: Thu, 6 Jan 2005 16:51:03 +0200 From: "Michael S. Tsirkin" To: Andrew Morton Cc: Takashi Iwai , ak@suse.de, mingo@elte.hu, rlrevell@joe-job.com, linux-kernel@vger.kernel.org, pavel@suse.cz, discuss@x86-64.org, gordon.jin@intel.com, alsa-devel@lists.sourceforge.net, greg@kroah.com Subject: [PATCH] fget_light/fput_light for ioctls Message-ID: <20050106145103.GB25898@mellanox.co.il> Reply-To: "Michael S. Tsirkin" References: <20041215065650.GM27225@wotan.suse.de> <20041217014345.GA11926@mellanox.co.il> <20050103011113.6f6c8f44.akpm@osdl.org> <20050105144043.GB19434@mellanox.co.il> <20050105133448.59345b04.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050106002240.00ac4611.akpm@osdl.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1709 Lines: 61 Hello! With new unlocked_ioctl and ioctl_compat, ioctls can now be as fast as read/write. So lets use fget_light/fput_light there, to get some speedup in common case on SMP. mst Signed-off-by: Michael s. Tsirkin diff -rup linux-2.6.10/fs/compat.c linux-2.6.10-ioctls/fs/compat.c --- linux-2.6.10/fs/compat.c 2005-01-06 17:54:13.000000000 +0200 +++ linux-2.6.10-ioctls/fs/compat.c 2005-01-06 20:15:44.407259408 +0200 @@ -431,8 +431,9 @@ asmlinkage long compat_sys_ioctl(unsigne struct file *filp; int error = -EBADF; struct ioctl_trans *t; + int fput_needed; - filp = fget(fd); + filp = fget_light(fd, &fput_needed); if (!filp) goto out; @@ -476,7 +479,7 @@ asmlinkage long compat_sys_ioctl(unsigne do_ioctl: error = sys_ioctl(fd, cmd, arg); out_fput: - fput(filp); + fput_light(file, fput_needed); out: return error; } diff -rup linux-2.6.10/fs/ioctl.c linux-2.6.10-ioctls/fs/ioctl.c --- linux-2.6.10/fs/ioctl.c 2005-01-06 17:54:13.000000000 +0200 +++ linux-2.6.10-ioctls/fs/ioctl.c 2005-01-06 20:34:09.329285728 +0200 @@ -80,8 +83,9 @@ asmlinkage long sys_ioctl(unsigned int f struct file * filp; unsigned int flag; int on, error = -EBADF; + int fput_needed; - filp = fget(fd); + filp = fget_light(fd, &fput_needed); if (!filp) goto out; @@ -154,7 +158,7 @@ asmlinkage long sys_ioctl(unsigned int f break; } out_fput: - fput(filp); + fput_light(filp, fput_needed); out: return error; } - 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/