From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965104AbVHPE7S (ORCPT ); Tue, 16 Aug 2005 00:59:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932602AbVHPE7S (ORCPT ); Tue, 16 Aug 2005 00:59:18 -0400 Received: from ns.miraclelinux.com ([219.118.163.66]:45633 "EHLO mail01.miraclelinux.com") by vger.kernel.org with ESMTP id S932603AbVHPE7R (ORCPT ); Tue, 16 Aug 2005 00:59:17 -0400 Date: Tue, 16 Aug 2005 13:54:25 +0900 (JST) Message-Id: <20050816.135425.719901536.hyoshiok@miraclelinux.com> To: taka@valinux.co.jp Cc: lkml.hyoshiok@gmail.com, arjan@infradead.org, linux-kernel@vger.kernel.org, hyoshiok@miraclelinux.com Subject: Re: [RFC] [PATCH] cache pollution aware __copy_from_user_ll() From: Hiro Yoshioka In-Reply-To: <20050816.131729.15816429.taka@valinux.co.jp> References: <98df96d3050815163331d6cce1@mail.gmail.com> <20050816.123042.424254477.hyoshiok@miraclelinux.com> <20050816.131729.15816429.taka@valinux.co.jp> X-Mailer: Mew version 3.3 on XEmacs 21.4.13 (Rational FORTRAN) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Takahashi san, I appreciate your comments. > Hi, > > BTW, what are you going to do with the page-faults which may happen > during __copy_user_zeroing_nocache()? The current process may be blocked > in the handler for a while and get FPU registers polluted. > kernel_fpu_begin() won't help the case. This is another issue, though. My code does nothing do it. I need a volunteer to implement it. Regards, Hiro