Messages in this thread | | | Date | Thu, 24 Jul 2008 13:31:22 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: fix pte_flags() to only return flags, fix lguest (updated) |
| |
* Rusty Russell <rusty@rustcorp.com.au> wrote:
> On Tuesday 22 July 2008 19:04:32 Ingo Molnar wrote: > > i'm wondering. My randconfig tests boot up an lguest enabled kernel > > every 30 minutes or so: > > > > config-Mon_Jul_21_19_05_54_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_19_43_13_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_19_47_40_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_20_37_41_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_22_11_42_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_22_16_59_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_22_32_22_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_23_25_55_CEST_2008.good:CONFIG_LGUEST=y > > config-Mon_Jul_21_23_51_29_CEST_2008.good:CONFIG_LGUEST=y > > > > Would it be possible to have some really stupid lguest self-test which > > would complain spectacularly in the host kernel if it fails to reach > > some minimal user-space? > > > > Something that could be self-contained within a single bzImage. (i.e. it > > would contain a minimalistic image of some sort with a very minimalistic > > userspace component as well - or something like that) > > Well, adding "make -C Documentation/lguest" to the build is a good start (this > finds those "e820.h not longer includable from userspace" bugs). > > Secondly, if you put the resulting Documentation/lguest/lguest somewhere on > your booting test machine, it can just do something like > > ./lguest 64 /boot/vmlinuz-`uname -r` | grep 'VFS: Unable to mount root'
stupid question: what's the easiest way to filter out the case where there's not sufficient kernel support in the bzImage to actually run lguest?
I.e. if i extend the "is this bzImage working fine" check with the above lguest bootup test - with the expectation of it getting down to the "VFS: Unable to mount root" message [success case], how do i filter out the case where it doesnt get to that message not due to some lguest breakage, but because there's not enough lguest support there.
> Won't quite test userspace, but it's easy and will get the worst breakage. > If we want to be more ambitious, I'd suggest a tiny initrd with a > statically-linked /hello_world to test userspace: > > ./lguest --initrd=/boot/hello_world.initrd 64 /boot/vmlinuz-`uname -r` \ > rdinit=/hello_world | grep 'Hello world' > > I can create one (and test the example) for you if you're interested?
that would be great ...
Ingo
| |