Re: [PATCH] flush icache before set_pte take6. [4/4] optimizationfor cpus other than montecito
From: Zoltan Menyhart
Date: Tue Jul 31 2007 - 04:39:06 EST
David Mosberger-Tang wrote:
This seems crazy to me. Flushing should occur according to the
*architecture*, not model-by-model. Even if we happen to get "lucky"
on pre-Montecito CPUs, that doesn't justify such ugly hacks. Or you
really want to debug this *again* come next CPU?
--david
O.K. let's say we flush by default: the global flag is set.
We can have a (short) list of the CPU models which do not require
this flush.
If all of the CPUs are on the list then clear the global flag. And:
static inline void sync_icache_dcache(pte_t pte) {
if (pte_exec(pte) && global_flag)
__sync_icache_dcache(pte);
}
Thanks,
Zoltan
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