Date: Sun, 12 Apr 2009 20:56:24 +0200 From: Juergen Lock <nox@jelal.kn-bremen.de> To: Bakul Shah <bakul@bitblocks.com> Cc: jtidwell <necanthrope@gmail.com>, freebsd-emulation@freebsd.org Subject: Re: cannot get kqemu to load with kldload Message-ID: <20090412185624.GB65339@triton.kn-bremen.de> In-Reply-To: <20090412182939.E23F15B23@mail.bitblocks.com> References: <22999502.post@talk.nabble.com> <22999521.post@talk.nabble.com> <200904121415.n3CEFDCf025538@triton.kn-bremen.de> <20090412182939.E23F15B23@mail.bitblocks.com>
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On Sun, Apr 12, 2009 at 11:29:39AM -0700, Bakul Shah wrote: > On Sun, 12 Apr 2009 16:15:13 +0200 Juergen Lock <nox@jelal.kn-bremen.de> wrote: > > In article <20090411192326.GA73059@freebsd.org> you write: > > >On Sat, Apr 11, 2009 at 02:43:52AM -0700, jtidwell wrote: > > >> > > >> > > >> > > >> jtidwell wrote: > > >> > > > >> > Greetings, qemu folk :) > > >> > > > >> > I've recently upgraded my FreeBSD box from 6.2 to 7.2. I'm trying to > > >> > install qemo, but I keep getting stuck at the point where I load kqemu > > >> > with kldload. The module file exists in /boot/modules, but I get this > > >> > error every time I try to load: > > >> > > > >> > # kldload kqemu > > >> > kldload: can't load kqemu: No such file or directory > > This is a confusing message when kldload can't find a symbol. > > > >> > > > >> > # ls /boot/modules > > >> > kqemu.ko linker.hints rt2500_sys.ko rt61_sys.ko > > >> > > > >> > > > >> > > >> I forgot to add, I get this error message on the console when i try to loa > > d > > >> the module: > > >> > > >> link_elf : symbol sched_lock undefined > > > > > >you use ULE, right? try switching to 4BSD... the .ko uses 4BSD specific thin > > gs, > > >no idea why > > In kqemu-kmod-devel, kqemu-freebsd.c uses sched_lock() in > kqemu_schedule() if __FreeBSD_version is < 700044 & > 500000. > 7.0 has __FreeBSD_version defined to be 700055. > 7.1 has __FreeBSD_version defined to be 701000. > > So the OP shouldn't have had the problem he is seeing if he > has indeed updated to 7.x and is getting the right kqemu.ko. > > I suggest he do pkg_delete /var/db/pkg/kqemu-kmod*, ensure > that /boot/module/kqemu.ko is gone and then rebuild and > install kqemu-kmod-devel. > > But this brings up another problem with kqemu: if you are > using SCHED_4BSD with 7.x or current, kqemu is not guaranteed > to work. Oh, so the code it then uses in kqemu_schedule() is ule only? Does the old scheduler still use sched_lock? [...] struct thread *td = curthread; thread_lock(td); mi_switch(SW_VOL, NULL); thread_unlock(td); [...] Wondering... Juergen
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