From owner-freebsd-hackers Wed Mar 13 22:39:36 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from rover.village.org (rover.bsdimp.com [204.144.255.66]) by hub.freebsd.org (Postfix) with ESMTP id 8107237B419 for ; Wed, 13 Mar 2002 22:39:33 -0800 (PST) Received: from harmony.village.org (harmony.village.org [10.0.0.6]) by rover.village.org (8.11.3/8.11.3) with ESMTP id g2E6dWi34299; Wed, 13 Mar 2002 23:39:32 -0700 (MST) (envelope-from imp@village.org) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.11.6/8.11.6) with ESMTP id g2E6dUL46902; Wed, 13 Mar 2002 23:39:30 -0700 (MST) (envelope-from imp@village.org) Date: Wed, 13 Mar 2002 23:39:11 -0700 (MST) Message-Id: <20020313.233911.13239928.imp@village.org> To: silby@silby.com Cc: tlambert2@mindspring.com, cce@clarkevans.com, freebsd-hackers@FreeBSD.ORG Subject: Re: panic: pmap_enter (closed, thanks!) From: "M. Warner Losh" In-Reply-To: <20020312202021.V16449-100000@patrocles.silby.com> References: <3C8EB403.B965336F@mindspring.com> <20020312202021.V16449-100000@patrocles.silby.com> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message: <20020312202021.V16449-100000@patrocles.silby.com> Mike Silbersack writes: : : On Tue, 12 Mar 2002, Terry Lambert wrote: : : > I'm glad the non-8:1 ratio works. I thought that it should; : > the only suspicious code, from my point of vies, was the frag : > mask calculation. And I had a real hard time believing it to : > be wrong, except for Mike's claim that it was broken, since I : > haven't personally had problems with it. 8-(. : > : > -- Terry : : It's not my claim, it's Luigi Rizzo and Warner Losh's claim. I haven't : had any personal experience with such ratios, but I trust that if those : two are pointing the finger, there is a problem. I have strong circumstantial evidence that weird things happen when you don't have 8:1, but not when you have it. I haven't been able to pin things down enough to get a good bug report, however. Maybe it is a red herring, but making only that change to a mfs mount creation (eg 4:1 -> 8:1) turns a system from a hang bait on boot (1 in 4 boots hang) to rock solid (> 1000 boots w/o a hang). Warner To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message