[Fedora-xen] Re: [Xen-ia64-devel] Fedora-xen-ia64 test status

[Dave Jones]

On Fri, Aug 04, 2006 at 05:34:50AM +0900, Akio Takebe wrote:
Content-Description: Mail message body
 > Hi, Xen/IA64 people
 > 
 > When I boot the dom0, I get some __might_sleep()'s messages.
 > 
 > BUG: sleeping function called from invalid context at kernel/rwsem.c:20
 > in_atomic():0, irqs_disabled():1
 > 
 > Call Trace:
 >  [<a00000010001c7a0>] show_stack+0x40/0xa0
 >                                 sp=e00000002f7dfbb0 bsp=e00000002f7d91a8
 >  [<a00000010001c830>] dump_stack+0x30/0x60
 >                                 sp=e00000002f7dfd80 bsp=e00000002f7d9190
 >  [<a00000010006c920>] __might_sleep+0x2a0/0x2c0
 >                                 sp=e00000002f7dfd80 bsp=e00000002f7d9168
 >  [<a0000001000bce80>] down_read+0x20/0x60
 >                                 sp=e00000002f7dfd80 bsp=e00000002f7d9148
 >  [<a0000001005b14f0>] ia64_do_page_fault+0x110/0x9e0
 >                                 sp=e00000002f7dfd80 bsp=e00000002f7d90f8
 >  [<a000000100064be0>] xen_leave_kernel+0x0/0x3b0
 >                                 sp=e00000002f7dfe30 bsp=e00000002f7d90f8
 > 
 > 
 > Do we need CONFIG_DEBUG_SPINLOCK_SLEEP?

Yes, because it highlights bugs like the above.

 > If we need CONFIG_DEBUG_SPINLOCK_SLEEP, we must modify __might_sleep().

No, you must fix ia64 so that it doesn't call down_read with
interrupts disabled.

		Dave

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