[Fedora-ia64-list] Re: [Xen-ia64-devel] Fedora-xen-ia64 test status
Dave Jones
davej at redhat.com
Thu Aug 3 20:46:54 UTC 2006
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
--
http://www.codemonkey.org.uk
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