From owner-freebsd-smp Tue Nov 5 00:08:26 1996 Return-Path: owner-smp Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id AAA14906 for smp-outgoing; Tue, 5 Nov 1996 00:08:26 -0800 (PST) Received: from clem.systemsix.com (clem.systemsix.com [198.99.86.131]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id AAA14899; Tue, 5 Nov 1996 00:08:22 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by clem.systemsix.com (8.6.12/8.6.12) with SMTP id BAA09221; Tue, 5 Nov 1996 01:08:02 -0700 Message-Id: <199611050808.BAA09221@clem.systemsix.com> X-Authentication-Warning: clem.systemsix.com: Host localhost didn't use HELO protocol X-Mailer: exmh version 1.6.5 12/11/95 From: Steve Passe To: Bruce Evans cc: dg@Root.COM, hackers@freefall.freebsd.org, smp@freefall.freebsd.org Subject: Re: ed0 timeouts In-reply-to: Your message of "Tue, 05 Nov 1996 15:56:31 +1100." <199611050456.PAA10694@godzilla.zeta.org.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Tue, 05 Nov 1996 01:08:02 -0700 Sender: owner-smp@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk Hi, >>However system IO seemed to get hosed when I entered ddb to check >>the values of a few checkpoints I keep for debug. >>I went in/out of ddb several times (I think) but then going out the system >>"semi-hung": I could not get back to my virtual term, nor could I loggin >>anywhere else. I could ping the system so at least part of it lived... >> >>Have you ever seen similar problems with this code on your system? > >ISTR remember that the non-masking of interrupts in ddb became critical >when I implemented lazy masking. It was at least difficult to debug. I just had the same hang without entering ddb. I was running emacs via an X session on another system, with light load on the system. Looked like it might be something unique to the SMP kernel, appeared to be stuck in get_mplock(). Hopefully next time it happens I will be able to spend some time in the debugger to find more clues... In general it appears to be working well, I was up for 3-4 hours b4 this occured without a single lost INT (that I noticed, anyways!) -- Steve Passe | powered by smp@csn.net | FreeBSD -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQCNAzHe7tEAAAEEAM274wAEEdP+grIrV6UtBt54FB5ufifFRA5ujzflrvlF8aoE 04it5BsUPFi3jJLfvOQeydbegexspPXL6kUejYt2OeptHuroIVW5+y2M2naTwqtX WVGeBP6s2q/fPPAS+g+sNZCpVBTbuinKa/C4Q6HJ++M9AyzIq5EuvO0a8Rr9AAUR tBlTdGV2ZSBQYXNzZSA8c21wQGNzbi5uZXQ+ =ds99 -----END PGP PUBLIC KEY BLOCK-----