Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 18 Dec 2002 03:38:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 18 Dec 2002 03:38:52 -0500 Received: from khms.westfalen.de ([62.153.201.243]:32993 "EHLO khms.westfalen.de") by vger.kernel.org with ESMTP id ; Wed, 18 Dec 2002 03:38:52 -0500 Date: 18 Dec 2002 09:20:00 +0200 From: kaih@khms.westfalen.de (Kai Henningsen) To: linux-kernel@vger.kernel.org Message-ID: <8c6-Z4kHw-B@khms.westfalen.de> In-Reply-To: Subject: Re: Intel P6 vs P7 system call performance X-Mailer: CrossPoint v3.12d.kh10 R/C435 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Organization: Organisation? Me?! Are you kidding? References:

X-No-Junk-Mail: I do not want to get *any* junk mail. Comment: Unsolicited commercial mail will incur an US$100 handling fee per received mail. X-Fix-Your-Modem: +++ATS2=255&WO1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 966 Lines: 28 torvalds@transmeta.com (Linus Torvalds) wrote on 17.12.02 in : > On Tue, 17 Dec 2002, Richard B. Johnson wrote: > > > > You can call intersegment with a full pointer. I don't know how > > expensive that is. > > It's so expensive as to not be worth it, it's cheaper to load a register > or something, i eyou can do > > pushl $0xfffff000 > call *(%esp) > > faster than doing a far call. Hmm ... How expensive would it be to have a special virtual DSO built into ld.so which exported this (and any other future entry points), to be linked against like any other DSO? That way, the *actual* interface would only be between the kernel and ld.so. MfG Kai - 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/