Date: Tue, 27 Jan 2004 14:19:54 -0800 From: Peter Losher <Peter_Losher@isc.org> To: John Baldwin <jhb@FreeBSD.org> Cc: current@freebsd.org Subject: Re: spin lock panic in 5.2-REL Message-ID: <200401271420.05240.Peter_Losher@isc.org> In-Reply-To: <200401271334.07761.jhb@FreeBSD.org> References: <20040127082106.L14045@farside.isc.org> <200401271334.07761.jhb@FreeBSD.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Tuesday 27 January 2004 10:34 am, John Baldwin wrote: > This is a very hard to debug problem. If WITNESS is on it provides more > useful information that can help track that down, but I wouldn't expect a > production machine to be using WITNESS. Yes, I was running a kernel for a short while w/ INVARIANTS and WITNESS, but it was basically useless after a couple of hours under load under the giant lock. How much of a performance hit is just WITNESS? (I also got a "me too" message from someone privately who experianced the same issue after a 5.1->5.2 update) - -Peter - -- Peter_Losher@isc.org | ISC | OpenPGP 0xE8048D08 | "The bits must flow" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAFuQUPtVx9OgEjQgRAlR1AJwJJ6lFXLgQjX0uwGTnUicCAjx9PwCgs1Q5 v9iUdxy7mvKGloxNMrwb7so= =xyWP -----END PGP SIGNATURE-----help
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