On Thu, 8 Nov 2001, Ingo Molnar wrote:
> > Are there any speed difference between hard-linked device drivers and
> > their modular counterparts?
>
> minimal. a few instructions per IO.
Arjan pointed out that there is also the cost of TLB misses due to
vmalloc()-ing module libraries, which can be as high as a 5% slowdown.
we should fix this by trying to allocate continuous physical memory if
possible, and fall back to vmalloc() only if this allocation fails.
Ingo
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This archive was generated by hypermail 2b29 : Thu Nov 15 2001 - 21:00:18 EST