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    SubjectRe: cpu_active vs pcrypt & padata
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    On Fri, 2012-03-16 at 11:44 +0100, Steffen Klassert wrote:
    > Hi.
    >
    > On Fri, Mar 16, 2012 at 11:13:08AM +0100, Peter Zijlstra wrote:
    > > Hi Steffen,
    > >
    > > I found cpu_active usage in crypto/pcrypt.c and was wondering what
    > > that's doing there. I would really like to contain that thing to as
    > > narrow a piece of kernel as I possible can (sched/cpuset/hotplug) but it
    > > appears to be spreading.
    >
    > pcrypt uses cpu_active to tell padata which cpuset it whishes
    > to use for parallelization. I could try to push the cpumask
    > handling down to padata if you want to limit this to the core
    > kernel.

    /me more confused now.. cpu_active isn't in any way shape or form
    related to cpusets.

    > > Also, wth is all this kernel/padata.c stuff? There's next to no useful
    > > comment in there and the only consumer seems to be pcrypt, does that
    > > really need to be in kernel/ ?
    >
    > The padata code is generic and not limited to crypto, you can find
    > a documentation at Documentation/padata.txt.

    Would be nice to have a short blurb in kernel/padata.c with a reference
    to that Documentation stuff for more in-depth bits.


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