Messages in this thread |  | | | Date | Wed, 31 Mar 2010 14:57:20 -0700 | | From | "H. Peter Anvin" <> | | Subject | Re: start_kernel(): bug: interrupts were enabled early |
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On 03/31/2010 02:54 PM, Russell King wrote: > On Wed, Mar 31, 2010 at 04:42:25PM -0500, Christoph Lameter wrote: >> Do not run the checks while we are in a single threaded context? >> >> I thought we had some dynamic code patching thingamy that could change >> those when we go to smp mode? > > You have to remember that on embedded architectures, such as ARM, > where XIP is supported we can't change the text segment at run time - > which means dynamic code patching won't work. > > However, the kernel should still work in such situations. >
The question still remains what the incremental cost is of doing irqsave/irqrestore.
-hpa
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