Messages in this thread | | | Date | Mon, 1 Aug 2011 21:32:06 +0400 | From | Vasiliy Kulikov <> | Subject | Re: shm updates broke UML |
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Marc,
On Mon, Aug 01, 2011 at 21:24 +0400, Vasiliy Kulikov wrote: > On Mon, Aug 01, 2011 at 19:19 +0200, Marc Zyngier wrote: > > Here you go (sorry about the line wrapping, damned webmail...): > > Thank you! Now I see that the problem is rw_mutex is not initialized: > > down_write(&shm_ids(ns).rw_mutex); > > void __sched __down_write_nested(struct rw_semaphore *sem, int subclass) > { > ... > if (sem->activity == 0 && list_empty(&sem->wait_list)) { > ^^^^^^^^^^^^^^^ is NULL > > Wtf - ipc namespace should be fully initialized for the moment of > threads run...
Does ARM try to run _any_ threads before do_initcalls()? IPC initialization is initcall, so any thread before do_initcalls() is a dependency bug.
static void __init do_basic_setup(void) { cpuset_init_smp(); usermodehelper_init(); init_tmpfs(); driver_init(); init_irq_proc(); do_ctors(); do_initcalls(); <<<< }
Thanks,
-- Vasiliy Kulikov http://www.openwall.com - bringing security into open computing environments
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