Messages in this thread | | | Subject | Re: start_kernel(): bug: interrupts were enabled early | From | Benjamin Herrenschmidt <> | Date | Thu, 01 Apr 2010 17:50:23 +1100 |
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On Wed, 2010-03-31 at 23:26 -0700, H. Peter Anvin wrote: > On 03/31/2010 03:26 PM, Andrew Morton wrote: > > > > Not by adding overhead to every single down_read()/down_write() just to > > fix a once-off startup problem - that's taking laziness way too far. > > > > How much overhead is this on non-x86 architectures (keep in mind x86 > doesn't use this?)
None on powerpc, we use atomic ops and don't disable IRQs.
BTW. The same problem used to happen with mutex debug. Was this ever fixed ?
Cheers, Ben.
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