Date: Sun, 23 Mar 2008 22:45:28 +0100 From: Juergen Lock <nox@jelal.kn-bremen.de> To: Oliver Fromme <olli@lurza.secnetix.de> Cc: freebsd-emulation@freebsd.org Subject: Re: qemu coredumps on RELENG_7 Message-ID: <20080323214528.GB62472@saturn.kn-bremen.de> In-Reply-To: <200803221513.m2MFDTXx058806@lurza.secnetix.de> References: <200803202015.m2KKFTBX080186@saturn.kn-bremen.de> <200803221513.m2MFDTXx058806@lurza.secnetix.de>
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On Sat, Mar 22, 2008 at 04:13:29PM +0100, Oliver Fromme wrote:
>
> Juergen Lock wrote:
> > Oliver Fromme wrote:
> > > D Hill <d.hill@yournetplus.com> wrote:
> > > > Rick C. Petty wrote:
> > > > > Oliver Fromme wrote:
> > > > > > Kostik Belousov wrote:
> > > > > > >
> > > > > > > Definitely,
> > > > > > > kldload aio
> > > > > > > before running qemu.
> > > > > >
> > > > > > 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.
> > > > >
> > Actually it is also documented in the pkg-message of the port(s), but
> > apparently nobody reads that...
>
> How are you supposed to read it when you install a bunch
> of ports in batch mode, i.e. unattended (for example,
> over night or during lunch break)?
>
> Therefore I think that pkg-message is _not_ the correct
> place for critical ionformation like that.
>
> > (OK I could patch a pointer to that
> > into the manpage, do other ports do that?)
>
> There are several ports that patch port-specific things
> into the manpage. Prominent examples are gzip, jpeg,
> bash, cdrtools and openssh-portable.
>
Alright, so how about the following:
Index: qemu/qemu-doc.texi
@@ -985,7 +985,8 @@
@c man begin SEEALSO
The HTML documentation of QEMU for more precise information and Linux
-user mode emulator invocation.
+user mode emulator invocation, as well as the FreeBSD host notes in
+@file{pkg-message} in the relevant qemu port directory.
@c man end
@c man begin AUTHOR
> > 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...)
> >
> > Index: qemu/vl.c
> > @@ -8423,6 +8423,12 @@
> > nb_nics = 0;
> > /* default mac address of the first network interface */
> >
> > +#ifdef __FreeBSD__
> > + loadmodules(0, "aio", NULL);
> > + if (modfind("aio") == -1)
> > + fprintf(stderr, "warning: aio not (kld)loaded, may cause `Invalid system call' traps on disk IO\n");
> > +#endif
>
> I prefer it didn't try to load the module itself. That's
> a decision I want to make myself.
Yeah I removed the load attempt.
> But the message is
> perfectly fine. It would have saved me quite some time.
>
> Thanks!
>
> Best regards
> Oliver
You're welcome,
Juergen
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