Date: Mon, 18 Mar 2002 13:24:04 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: smp@FreeBSD.ORG, current@FreeBSD.ORG, hitmaster2k@yahoo.com, phk@FreeBSD.ORG, tanimura@r.dl.itc.u-tokyo.ac.jp, Munehiro Matsuda <haro@h4.dion.ne.jp>, Alfred Perlstein <bright@mu.org> Subject: Re: -current lock warning... Message-ID: <XFMail.20020318132404.jhb@FreeBSD.org> In-Reply-To: <Pine.NEB.3.96L.1020317120811.965J-100000@fledge.watson.org>
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On 17-Mar-2002 Robert Watson 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... More correct is that probably no locks other than Giant should be held for copyin/copyout. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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