[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Booting NetBSD in pygrub
On Mon, 2013-09-09 at 19:52 +0200, M. Boerschig wrote: > On 09/09/13 14:35, Ian Campbell wrote: > > On Sat, 2013-09-07 at 11:56 +0000, M. Boerschig wrote: > > I think this implies a Linux dom0? > > Yes, of course. I didn't even get a recent xen (> 4.2) to compile on my > NetBSD machine. > > > > > I imagine this is equally broken with a Linux domU, because it doesn't > > seem likely to be guest specific, given that it is mostly before the > > guest runs... > > > > An Ubuntu domU works on this same machine, so I think this problem is > limited to my use case (or a similar one, like solaris) In this case do you get the interactive menu? I wonder if passing bootloader_args = ["--entry=0"] would reproduce the same error you are seeing by skipping the menu and making it behave like sniff_solaris? > > This stuff ha been a bit fragile in the past, I wouldn't be too > > surprised if it had regressed, especially since it isn't especially > > amenable to automated testing. > > > > What is supposed to happen is that pygrub gets launched attached to a > > pty, and that ptr gets written to xenstore such that the xenconsole > > client connects to it and presents the pygrub output to the user as if > > it were the guest console, xl acts as a pump copying data back and forth > > between the console pty and pygrubs pty (since both console and pygrub > > expect to be a slave). Much of this code is in libxl_bootloader.c. > > > > Once pygrub exits this pty disappears and the console client should > > reattach to the real guest console pty, which is provided by > > xenconsoled. > > > > It sounds like that first connection is not going to the right place or > > is otherwise broken. > > > > Are you seeing the pygrub menu? DO you expect to? Perhaps the automatic > > exit of the first session is not working? > > No, and I didn't expect a menu to appear. > I assumed a menu is only displayed if the run_grub()-method succeeds in > finding a valid GRUB menu.lst/config on the disk. > I used the sniff_solaris() code as a guideline: if I understand the code > correctly it just returns a configuration dictionary without displaying > anything. OK. > > The last relevant looking commit to libxl_bootloader.c was > > 7253e0fd1aeb3ae7d4714bcc1d86b846b3331995 which looks like the sort of > > thing which might accidentally introduce such behaviour. > > Thanks for the pointer, I'll investigate if pygrub's exit is properly > handled later this week. Great, please let us know how you get on! Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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