Date: Fri, 26 Mar 2004 11:37:51 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: des@des.no Cc: arch@freebsd.org Subject: Re: Is MTX_CONTESTED evil? Message-ID: <20040326.113751.14204546.imp@bsdimp.com> In-Reply-To: <xzpekrgf103.fsf@dwp.des.no> References: <200403260230.i2Q2UTNZ097932@green.homeunix.org> <xzpekrgf103.fsf@dwp.des.no>
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In message: <xzpekrgf103.fsf@dwp.des.no>
des@des.no (Dag-Erling Sm=F8rgrav) writes:
: "Brian F. Feldman" <green@FreeBSD.org> writes:
: > Well, that certainly explains the blitz of crashes I had to fix
: > recently! Since INVARIANTS and WITNESS are on by default, it would=
: > make sense to make ADAPTIVE_MUTEX default to catch more bugs.
: =
: Making ADAPTIVE_MUTEXES default will not catch more bugs, it will jus=
t
: piss off users.
I think that if we don't fix the class of bugs that AM points out,
we'll ruin our reputation as a quality system in the long run. Maybe
they are so pervasive that we don't want to turn it on by default just
yet, but there will come a time we turn it on, just like we turned on
WITNESS and INVARIANTS to get better coverage on our testing.
Warner
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