Re: [PATCH] flush icache before set_pte take6. [4/4] optimization for cpus other than montecito

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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
-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Kernel]     [Sparc Linux]     [DCCP]     [Linux ARM]     [Yosemite News]     [Linux SCSI]     [Linux x86_64]     [Linux for Ham Radio]

  Powered by Linux