From owner-freebsd-bugs@FreeBSD.ORG Tue Feb 21 12:34:27 2006 Return-Path: X-Original-To: freebsd-bugs@freebsd.org Delivered-To: freebsd-bugs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A975D16A420 for ; Tue, 21 Feb 2006 12:34:27 +0000 (GMT) (envelope-from miguel@anjos.strangled.net) Received: from mailrly01.isp.novis.pt (mailrly01.isp.novis.pt [195.23.133.211]) by mx1.FreeBSD.org (Postfix) with ESMTP id B733143D53 for ; Tue, 21 Feb 2006 12:34:26 +0000 (GMT) (envelope-from miguel@anjos.strangled.net) Received: (qmail 32541 invoked from network); 21 Feb 2006 12:34:24 -0000 Received: from unknown (HELO mailfrt12.isp.novis.pt) ([195.23.133.228]) (envelope-sender ) by mailrly01.isp.novis.pt with compressed SMTP; 21 Feb 2006 12:34:24 -0000 Received: (qmail 4711 invoked from network); 21 Feb 2006 12:34:23 -0000 Received: from unknown (HELO compaq.anjos.strangled.net) ([87.196.136.73]) (envelope-sender ) by mailfrt12.isp.novis.pt with SMTP; 21 Feb 2006 12:34:23 -0000 Received: from compaq.anjos.strangled.net (localhost [127.0.0.1]) by compaq.anjos.strangled.net (8.13.4/8.13.4) with ESMTP id k1LCYHDb006612 for ; Tue, 21 Feb 2006 12:34:18 GMT (envelope-from miguel@compaq.anjos.strangled.net) Received: (from miguel@localhost) by compaq.anjos.strangled.net (8.13.4/8.13.4/Submit) id k1LCYGuA006611 for freebsd-bugs@freebsd.org; Tue, 21 Feb 2006 12:34:16 GMT (envelope-from miguel) Date: Tue, 21 Feb 2006 12:34:16 GMT From: Miguel Lopes Santos Ramos Message-Id: <200602211234.k1LCYGuA006611@compaq.anjos.strangled.net> To: freebsd-bugs@freebsd.org Subject: Interrupt storm caused by ehci escapes storm protection X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Feb 2006 12:34:27 -0000 Hello, I haved detected a problem with device ehci on this amd64 laptop, for which I have already sent a problem report for the usb team (usb/93640). A question remains. Device ehci generates on this system an interrupt storm of 60000 interrupts per second. This should be throttled by kernel interrupt storm protection (on kern/kern_intr.c), but isn't, and the ISR starves the system, rendering it as slow as an old 386 25MHz. The message "Interrupt storm detected on %s; throttling interrupt source." never appears on the console. This problem happens on all versions after 6.0 with a stock GENERIC kernel. Should I send a separate problem report for the failure of storm protection? Miguel Ramos