Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933881AbWK3KIg (ORCPT ); Thu, 30 Nov 2006 05:08:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933934AbWK3KIg (ORCPT ); Thu, 30 Nov 2006 05:08:36 -0500 Received: from smtp105.mail.mud.yahoo.com ([209.191.85.215]:49026 "HELO smtp105.mail.mud.yahoo.com") by vger.kernel.org with SMTP id S933892AbWK3KIf (ORCPT ); Thu, 30 Nov 2006 05:08:35 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=SWHwE6Zzj0CT57vrrhKUs7yS3CrjTY4H+stjaskKHLEcJkWvdTPyF6vgnVOlXJvh47lpYFTelnTsauCjYQKyDL30FCnJDa3UGH4zwdqLUfHLmwu6e0OC1DxDvAQZWgAUpQwWP7zy8r4dVNBzi5dkPfVYkP/ypTbP2MxINJdx/Ng= ; X-YMail-OSG: loKOseAVM1n9lHPqtY1UOEKE8eNU0Vh_mdmYVrzET.PoGLgcLg5yrkA9S6Cs1LSg3Gv38wr8cpvjmiuw6t1Ev_47gno6.GASE2VxbxeHGZAh4HaZRS6LjLeDhsiQSzT5pCppIxSVBRXCspA- Message-ID: <456EAD6E.6040709@yahoo.com.au> Date: Thu, 30 Nov 2006 21:07:42 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20051007 Debian/1.7.12-1 X-Accept-Language: en MIME-Version: 1.0 To: Evgeniy Polyakov CC: Ingo Molnar , David Miller , wenji@fnal.gov, akpm@osdl.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [patch 1/4] - Potential performance bottleneck for Linxu TCP References: <20061130061758.GA2003@elte.hu> <20061129.223055.05159325.davem@davemloft.net> <20061130064758.GD2003@elte.hu> <20061129.231258.65649383.davem@davemloft.net> <20061130073504.GA19437@elte.hu> <20061130095232.GA8990@2ka.mipt.ru> In-Reply-To: <20061130095232.GA8990@2ka.mipt.ru> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 957 Lines: 22 Evgeniy Polyakov wrote: > On Thu, Nov 30, 2006 at 08:35:04AM +0100, Ingo Molnar (mingo@elte.hu) wrote: > Doesn't the provided solution is just a in-kernel variant of the > SCHED_FIFO set from userspace? Why kernel should be able to mark some > users as having higher priority? > What if workload of the system is targeted to not the maximum TCP > performance, but maximum other-task performance, which will be broken > with provided patch. David's line of thinking for a solution sounds better to me. This patch does not prevent the process from being preempted (for potentially a long time), by any means. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com - 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/