On Wed, 2013-05-22 at 13:16 -0700, Eric Dumazet wrote:
> On Wed, 2013-05-22 at 12:57 -0700, Joe Perches wrote:
> > It might also be nice to mark it if ever more than a u16
> > brace/flock/coven/cluster worth of cpus become feasible
> > as it seems int is used almost everywhere else.
>
> It seems Linus hates cpu_t or whatever_t
Go figure.
> Thats why we have u16 everywhere to code cpu numbers, and why we use
> "unsigned long" for jiffies.
u16 for cpu is hardly used at all.
$ git grep -E "^\s*\w+\s+cpu\s*;" | cut -f2- -d":" | \
sed -r -e 's/^\s+//g' -e 's/\s+/ /g' -e 's/;.*//' | \
sort | uniq -c | sort -rn
569 int cpu
29 return cpu
28 __u32 cpu
14 u32 cpu
7 unsigned cpu
5 u16 cpu
4 cpuid_t cpu
3 uint32_t cpu
2 __u8 cpu
2 u64 cpu
2 s32 cpu
2 long cpu
1 u8 cpu
1 __u16 cpu
1 struct cpu
1 short cpu
1 __le32 cpu
1 geo_cpu_t cpu
> So far, I believe linux supports at most 4096 cpus.
I believe that as well.
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