From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261903AbULKBXS (ORCPT ); Fri, 10 Dec 2004 20:23:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261904AbULKBXS (ORCPT ); Fri, 10 Dec 2004 20:23:18 -0500 Received: from fw.osdl.org ([65.172.181.6]:45547 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261903AbULKBXO (ORCPT ); Fri, 10 Dec 2004 20:23:14 -0500 Date: Fri, 10 Dec 2004 17:23:02 -0800 (PST) From: Linus Torvalds To: Alan Cox cc: Pavel Pisa , Ingo Molnar , Linux Kernel Mailing List , trivial@rustcorp.com.au Subject: Re: VM86 interrupt emulation breakage and FIXes for 2.6.x kernel series In-Reply-To: <1102723114.4774.9.camel@localhost.localdomain> Message-ID: References: <200412091459.51583.pisa@cmp.felk.cvut.cz> <1102712732.3264.73.camel@localhost.localdomain> <1102723114.4774.9.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 10 Dec 2004, Alan Cox wrote: > > On Gwe, 2004-12-10 at 22:55, Linus Torvalds wrote: > > On Fri, 10 Dec 2004, Alan Cox wrote: > > The vm86 interrupt does not allow sharing. And it really _has_ to be > > disabled until user mode has cleared the irq source, or you'll have a very > > dead machine. > > Until the 10,000th event it actually seems to work rather happily > without that change. I suspect you never tried the level-triggered case. In the level-triggered case, the 10,000 interrupts happen faster than user-mode can even say "Whaaa?". Linus