* tip-bot for Jan Beulich <JBeulich@xxxxxxxxxx> wrote: > Commit-ID: 133ec7a235160dd44cbd4d82fff65a9983331df9 > Gitweb: http://git.kernel.org/tip/133ec7a235160dd44cbd4d82fff65a9983331df9 > Author: Jan Beulich <JBeulich@xxxxxxxxxx> > AuthorDate: Fri, 27 Nov 2009 15:09:16 +0000 > Committer: Ingo Molnar <mingo@xxxxxxx> > CommitDate: Wed, 2 Dec 2009 11:11:11 +0100 > > locking, x86: Slightly shorten __ticket_spin_trylock() -tip testing found that this causes a boot regression (locking during boot): commit 133ec7a235160dd44cbd4d82fff65a9983331df9 Author: Jan Beulich <JBeulich@xxxxxxxxxx> Date: Fri Nov 27 15:09:16 2009 +0000 locking, x86: Slightly shorten __ticket_spin_trylock() Since the callers generally expect a boolean value, there's no need to zero-extend the outcome of the comparison. It just requires that all of x86' trylock implementations return bo After a couple of silent hangs in random places during bootup i got one bootup that has a more telling output: CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02 Brought up 2 CPUs Total of 2 processors activated (8041.67 BogoMIPS). BUG: spinlock wrong owner on CPU#0, swapper/1 lock: 7b20b340, .magic: dead4ead, .owner: swapper/0, .owner_cpu: -1 Pid: 1, comm: swapper Not tainted 2.6.32-rc8-tip-02745-g401930b-dirty #9729 Call Trace: [<792a9959>] ? _raw_spin_unlock+0x46/0x76 [<79a8729c>] ? _spin_unlock_irqrestore+0x8/0x12 [<790268ae>] ? wait_task_inactive+0x73/0xa3 [<7902a0b5>] ? kthread_bind+0x1e/0x8a [<79037b46>] ? start_workqueue_thread+0x13/0x1d [<79037f99>] ? __create_workqueue_key+0x10b/0x165 [<7a02e26e>] ? init_workqueues+0x78/0x83 [<7a01d2f4>] ? kernel_init+0x12b/0x1ae [<7a01d1c9>] ? kernel_init+0x0/0x1ae [<79002dbf>] ? kernel_thread_helper+0x7/0x10 device: 'platform': device_add khelper used greatest stack depth: 3336 bytes left at first quick sight, this bit looks odd: + union { int i; bool b; } new; + return new.b; shouldnt that be short based, to work correctly in the 0-255 CPUs case? Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html