Re: [PATCH v2 2/2] rusage: allow 64-bit times ru_utime/ru_stime

[Ingo Molnar <mingo@kernel.org>]

* Arnd Bergmann <arnd@arndb.de> wrote:

> Sure, no problem. Do you have an opinion on the question I raised in the
> first patch [1], i.e. whether we actually want this to be done this way in the
> kernel, or one of the other approaches I described there?

So this looks like the most forward looking variant:

> a) deprecate the wait4() and getrusage() system calls, and create
>    a set of kernel interfaces based around a newly defined structure that
>    could solve multiple problems at once, e.g. provide more fine-grained
>    timestamps. The C library could then implement the posix interfaces
>    on top of the new system calls.

... but given the pretty long propagation time of new ABIs, is this a good 
solution? What would the limitations/trade-offs be on old-ABI systems?

Thanks,

	Ingo