Date: Wed, 13 Mar 2002 23:39:11 -0700 (MST) From: "M. Warner Losh" <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!) Message-ID: <20020313.233911.13239928.imp@village.org> In-Reply-To: <20020312202021.V16449-100000@patrocles.silby.com> References: <3C8EB403.B965336F@mindspring.com> <20020312202021.V16449-100000@patrocles.silby.com>
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In message: <20020312202021.V16449-100000@patrocles.silby.com>
Mike Silbersack <silby@silby.com> 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
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