From owner-cvs-all Mon Mar 5 19:33:39 2001 Delivered-To: cvs-all@freebsd.org Received: from cx281057-a.irvn1.occa.home.com (cx281057-a.irvn1.occa.home.com [24.1.175.22]) by hub.freebsd.org (Postfix) with ESMTP id E4BDD37B719; Mon, 5 Mar 2001 19:33:35 -0800 (PST) (envelope-from housel@acm.org) Received: from cx281057-a.irvn1.occa.home.com (localhost [127.0.0.1]) by cx281057-a.irvn1.occa.home.com (8.11.1/8.11.1) with ESMTP id f263Xs351254; Mon, 5 Mar 2001 19:33:55 -0800 (PST) (envelope-from housel@acm.org) Date: Mon, 05 Mar 2001 19:33:54 -0800 Message-ID: From: housel@acm.org (Peter S. Housel) To: John Baldwin Cc: cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG Subject: Re: cvs commit: src/sys/i386/isa apic_vector.s icu_vector.s In-Reply-To: References: <200103050437.f254bsP15616@freefall.freebsd.org> User-Agent: Wanderlust/2.4.0 (Rio) SEMI/1.13.7 (Awazu) FLIM/1.13.2 (Kasanui) Emacs/20.7 (i386--freebsd) MULE/4.0 (HANANOEN) MIME-Version: 1.0 (generated by SEMI 1.13.7 - "Awazu") Content-Type: text/plain; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG At Sun, 04 Mar 2001 20:41:59 -0800 (PST), John Baldwin wrote: > This fixed some hard hangs that David was seeing on his machine under heavy > load. It might also fix (or at lesat greatly diminish the number of > occurences) the "ltr" panics involving a kernel trap 9 with interrupts disabled. > By leaving interrupts disabled in sched_ithd, we don't allow ourselves to be > preempted by interrupt B while we are scheduling interrupt A. Otherwise, we > could become too deeply nested in our stack and overwrite various parts of the > pcb. (Some of which probably don't belong in the pcb.) Before this change, my Vaio C1VN would panic (trap 9 at the ltr instruction) after inserting a PCMCIA card. If the card was inserted during boot, it would panic just after the "pccard: card inserted, slot 0" message. Now it locks up solid in both cases. (No panic, and the DDB key doesn't work.) Cheers, -Peter- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message