Messages in this thread | | | Date | Sat, 7 May 2016 10:45:57 +0200 (CEST) | From | Thomas Gleixner <> | Subject | Re: [patch V2 2/7] futex: Hash private futexes per process |
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On Fri, 6 May 2016, Darren Hart wrote: > It would be good to have a way to detect that the process private hash table was > > successfully created. Perhaps a /proc/pid/ feature? This would allow us to write > > a functional futex test for tools/testing/selftests/futex > > I suppose we could just use FUTEX_PREALLOC_HASH for this purpose, passing in the > default hash size. This will either return the default, the previously set > value, or 0, indicating the global hash is being used. That should be sufficient > for programatically determining the state of the system.
Right.
> The /proc/pid/futex_hash_size option may still be convenient for other purposes. > Perhaps with a -1 indicating it hasn't been set yet.
Dunno, whether that's valuable, but it can be done on top.
Thanks,
tglx
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