Messages in this thread | | | Date | Thu, 27 Oct 2011 11:08:26 -0400 | From | Konrad Rzeszutek Wilk <> | Subject | Re: Regression: patch " hvc_console: display printk messages on console." causing infinite loop with 3.2-rc0 + Xen. |
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On Thu, Oct 27, 2011 at 07:45:07AM -0700, Miche Baker-Harvey wrote: > Bummer. Sorry about that. > > Konrad, could you give me a hand figuring out what's up with this - I'm not > running Zen here. (If there's a test suite I could have run, mea culpa, and > please point me in the right direction.)
I kind of run the nightly build/test rinse & repeat cycle using this:
git://xenbits.xen.org/xentesttools/bootstrap.git
But it might be just easier for you to install Fedora Core 16, do 'yum install xen', reboot, make sure you can boot Xen, and then build a 3.2 kernel with your patch + debug stuff.
> > The "console [hvc0] enabled" message is coming from register_console() in > printk.c, and it doesn't have any loops. > It's called from hvc_console_init(), hvc_instantiate(), and hvc_alloc(), > none of which have loops. The call in hvc_alloc() is the one I added, so > either I've inadvertently made one of the other two repeat (I'm guestting > hvc_instantiate() is the one you're using), or you're infinitely calling > hvc_alloc(). There's a calls to hvc_alloc() in hvc_xen.c::xen_hvc_init(), > and in init_port_console() in virtio_console.c, but again, no loops. > Similarly for hvc_instantiate(). > > So, could I trouble you to put a breakpoint in register_console() and send > me the stack?
A dump_stack() should suffice I presume? Yeah let me do that.
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