>
> Whereas it should probably go:
>
> if (max == 0) {
> max = (flags & HASH_HIGHMEM) ? nr_all_pages : nr_kernel_pages;
> max = (max << PAGE_SHIFT) >> 4;
> do_div(max, bucketsize);
> }
>
> or something like that.
That's still too big. Consider a 2TB machine, with all memory in LOWMEM.
Or even a smaller system. At some point it doesn't make sense
anymore to go to a larger table, even if you have the memory
and it is actually costly to have a larger table because walking
the table (netstat, route etc.) completely will take longer and longer.
It needs some additional limit. Either a maximum one or something dynamic
like CPU cache sizes (but there is currently no portable way to get that)
-Andi
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