> > 1) Does not handle writes that straddle multiple VMAs
>
> What exactly do you mean? In my test, files larger than a
> page were handled perfectly, as well.
mmap(file1 at location [a,b)
mmap(file2 at location [b,c)
write(sock, a, (size_t)(c - a));
> However, I didn't like the VM waste either, but I believe there
> is no other way.
The VM cost hurts. Badly. Imagine that the network costs ZERO. Then
the map/unmap/vm ops become the dominating term. That's why it is a
fruitless approach, it still has a practical limit which is too low.
-- --- Larry McVoy lm at bitmover.com http://www.bitmover.com/lm - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue Jan 07 2003 - 22:00:19 EST