* Robert Watson <rwatson@FreeBSD.ORG> [020317 09:08] wrote:
>
> On Sun, 17 Mar 2002, Alfred Perlstein wrote:
>
> > * Munehiro Matsuda <haro@h4.dion.ne.jp> [020317 06:36] wrote:
> > >
> > > PS. I got another message that happend when I ^C'ed a buildworld earlier,
> > > with same kernel. May be it should go to Alfred Perlstein?
> > >
> > > lock order reversal
> > > 1st 0xc198eec0 pipe mutex @ ../../../kern/sys_pipe.c:779
> > > 2nd 0xc0367fe0 Giant @ ../../../i386/i386/trap.c:716
> >
> > I think there's a place where the pipe can fault on an address while
> > copying, I'll take a look at this.
>
> Are there any assertions that should be in place for copyin/copyout
> requring fault handling? It sounds like somewhere we need to assert that
> Giant is held...
No, you need to assert that no other mutex other than Giant is held.
It would be nice... :)
--
-Alfred Perlstein [alfred@freebsd.org]
'Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.'
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