Date: Sun, 04 Mar 2001 20:41:59 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: RE: cvs commit: src/sys/i386/isa apic_vector.s icu_vector.s Message-ID: <XFMail.010304204159.jhb@FreeBSD.org> In-Reply-To: <200103050437.f254bsP15616@freefall.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 05-Mar-01 John Baldwin wrote: > jhb 2001/03/04 20:37:54 PST > > Modified files: > sys/i386/isa apic_vector.s icu_vector.s > Log: > Don't enable interrupts before calling sched_ithd for threaded interrupts. > > Tested by: obrien 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.) -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.010304204159.jhb>