Date: Thu, 20 Mar 2008 22:28:52 +0200 From: Kostik Belousov <kostikbel@gmail.com> To: Juergen Lock <nox@jelal.kn-bremen.de> Cc: freebsd-emulation@freebsd.org, olli@lurza.secnetix.de Subject: Re: qemu coredumps on RELENG_7 Message-ID: <20080320202852.GR10374@deviant.kiev.zoral.com.ua> In-Reply-To: <200803202015.m2KKFTBX080186@saturn.kn-bremen.de> References: <alpine.BSF.1.00.0803171507450.23872@duane.dbq.yournetplus.com> <200803202015.m2KKFTBX080186@saturn.kn-bremen.de>
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On Thu, Mar 20, 2008 at 09:15:29PM +0100, Juergen Lock wrote:
> In article <200803181152.m2IBq0Ih012824@lurza.secnetix.de> you write:
> >D Hill <d.hill@yournetplus.com> wrote:
> > > Rick C. Petty wrote:
> > > > Oliver Fromme wrote:
> > > > > Kostik Belousov wrote:
> > > > > >=20
> > > > > > Definitely,
> > > > > > kldload aio
> > > > > > before running qemu.
> > > > >=20
> > > > > Thank you, that seems to solve the problem indeed.
> > > > > Is that documented somewhere? It's not in the manpage.
> > > > > I think it should be in the manpage ... would have
> > > > > saved me quite some time.
> > > >=20
> Actually it is also documented in the pkg-message of the port(s), but
> apparently nobody reads that... (OK I could patch a pointer to that
> into the manpage, do other ports do that?)
>=20
> > > > Nope. It should be, or at least qemu should fail to start or at le=
ast
> > > > print a message instead of just randomly failing.
> >
> >Definitely.
> >
> > > > I ran into the same problem and only after spending hours trying to=
get it
> > > > to work did I remember to kldload aio.
> > >=20
> > > I don't know if this applies. However, I found this in=20
> > > /usr/ports/UPDATING:
> > >=20
> > > 20070206:
> >
> >It applies, but I think someone who installs qemu now
> >isn't supposed to read UPDATING all the way back to
> >February 2007. In fact, for fresh installs you should
> >not have to read UPDATING _at_ _all_.
> >
> >Important information like this should be in the manual
> >page, and -- as Rick pointed out -- the failure mode is
> >pathetic. It should print a useful error message right
> >at the start instead of randomly failing later.
>=20
> Anyway, this was easier than I thought: (it didn't occur to me that
> modfind(2) also finds modules that are statically linked into the kernel.=
..)
>=20
> Index: qemu/vl.c
> @@ -8423,6 +8423,12 @@
> nb_nics =3D 0;
> /* default mac address of the first network interface */
> =20
> +#ifdef __FreeBSD__
> + loadmodules(0, "aio", NULL);
> + if (modfind("aio") =3D=3D -1)
> + fprintf(stderr, "warning: aio not (kld)loaded, may cause `Invali=
d system call' traps on disk IO\n");
> +#endif
> +
> optind =3D 1;
> for(;;) {
> if (optind >=3D argc)
>=20
> Would everybody be satisfied with this now? :)
> Juergen
Me not :). Better print the message without the module load attempt.
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