Messages in this thread | | | Subject | Re: [BUG] 2.6.25-rc5-mm1 kernel panic with "Exception: 501 " on powerpc | From | Michael Ellerman <> | Date | Thu, 13 Mar 2008 09:26:09 +1100 |
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On Wed, 2008-03-12 at 11:51 -0600, Matthew Wilcox wrote: > On Wed, Mar 12, 2008 at 10:46:45AM -0700, Andrew Morton wrote: > > On Wed, 12 Mar 2008 18:25:37 +0530 Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> wrote: > > Beats me. Maybe we're still enabling interrupts too early. But the new > > semaphore code got fixed (didn't it?) > > On the 7th, according to my records. Easy to check -- look in > kernel/semaphore.c and see whether down() is using spin_lock_irqsave > (good) or spin_lock_irq (bad).
down() looks OK, but there's still a spin_lock_irq() in __down_common(), although I don't know if it makes sense for us to be in __down() at that stage.
cheers
-- Michael Ellerman OzLabs, IBM Australia Development Lab
wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183)
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