Date: Mon, 12 Jul 2004 21:07:16 +0200 From: Ulrich Spoerlein <q@uni.de> To: Ariff Abdullah <skywizard@MyBSD.org.my> Cc: Robert Watson <rwatson@freebsd.org> Subject: Re: Native preemption is the culprit [was Re: today's CURRENT lockups] Message-ID: <20040712190716.GA787@galgenberg.net> In-Reply-To: <20040710150620.7595b207.skywizard@MyBSD.org.my> References: <Pine.NEB.3.96L.1040709231313.19581G-100000@fledge.watson.org> <Pine.NEB.3.96L.1040710011206.19581H-100000@fledge.watson.org> <20040710150620.7595b207.skywizard@MyBSD.org.my>
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--LZvS9be/3tNcYl/X Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, 10.07.2004 at 15:06:20 +0800, Ariff Abdullah wrote: > I'm suspecting bad combination between threaded apps and current > native preemption, either the preemption itself, or threads. Running > current kernel without any threaded apps turns up nothing suspicious. > Once the threaded apps started, it's like sending the entire system to > the death row. >=20 > I'm reverting following files to pre-July 2 to achive solid stability: >=20 > sys/sys/interrupt.h - v1.27 > sys/kern/kern_intr.c - v1.110 > sys/i386/i386/intr_machdep.c - v1.6 > sys/kern/sched_ule.c - v1.109 I tried to upgrade my kernel from 5.2.1 to -CURRENT and cvsupped post-preemption. Running a UP-Kernel on a UP-Machine with either SCHED_ULE or SCHED_BSD froze the machine under heavy load. It doesn't survive a buildworld or a medium port-build. I tried the revisions above and the machine no longer freezes under load, but does an instant reboot :( Is the machine expected to crash/freeze when running a -CURRENT kernel on a 5.2R userland? I don't wanna installworld unless I get a rock-solid kernel, that's in sync with it. Ulrich Spoerlein --=20 PGP Key ID: F0DB9F44 Get it while it's hot! PGP Fingerprint: F1CE D062 0CA9 ADE3 349B 2FE8 980A C6B5 F0DB 9F44 "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin --LZvS9be/3tNcYl/X Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFA8uFkmArGtfDbn0QRAh+SAJ9GBN/W2Svhu55tWnJy3IhpnL9CsACfROYa dN/BG63h4w1JQVjo2ygBe5s= =LZmg -----END PGP SIGNATURE----- --LZvS9be/3tNcYl/X--
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