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SubjectRe: [PATCH] x86: Use clflush() instead of wbinvd() whenever possible when changing mapping
Pavel Machek skrev:
> On Fri 2009-07-24 09:53:01, Thomas Hellstrom wrote:
>> The current code uses wbinvd() when the area to flush is > 4MB. Although this
>> may be faster than using clflush() the effect of wbinvd() on irq
>> latencies
> You are slowing the kernel down, and you did not write down the
> reasons. bad.
I may slow the kernel down or speed it up depending on your hardware
configuration. The reasons should be quite obvious if you read the
discussion following the patch.


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