Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754882AbZKVMVa (ORCPT ); Sun, 22 Nov 2009 07:21:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754673AbZKVMV3 (ORCPT ); Sun, 22 Nov 2009 07:21:29 -0500 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:60842 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754570AbZKVMV3 (ORCPT ); Sun, 22 Nov 2009 07:21:29 -0500 Date: Sun, 22 Nov 2009 12:23:12 +0000 From: Alan Cox To: Ingo Molnar Cc: Robert Swan , Linus Torvalds , linux-kernel@vger.kernel.org Subject: Re: [bisected] pty performance problem Message-ID: <20091122122312.71a343d9@lxorguk.ukuu.org.uk> In-Reply-To: <20091122063926.GA18224@elte.hu> References: <20091121222319.GA3905@swanrl.gmail.com> <20091122063926.GA18224@elte.hu> X-Mailer: Claws Mail 3.7.3 (GTK+ 2.14.7; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 601 Lines: 17 On Sun, 22 Nov 2009 07:39:26 +0100 Ingo Molnar wrote: > > (Cc:-ed Alan and Linus - mail repeated below. eot.) I saw it and replied already. The kernel now queues the work for the pty as it does normal tty devices. If the CPU load is that low and nothing else is happening it makes me wonder what the scheduler thinks it is doing ? Alan -- 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/