lkml.org 
[lkml]   [2008]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [git pull] cpus4096 fixes
    Date
    On Monday 28 July 2008 18:16:39 Ingo Molnar wrote:
    > * Rusty Russell <rusty@rustcorp.com.au> wrote:
    > > Mike: I now think the right long-term answer is Linus' dense cpumap
    > > idea + a convenience allocator for cpumasks. We sweep the kernel for
    > > all on-stack vars and replace them with one or the other. Thoughts?
    >
    > The dense cpumap for constant cpumasks is OK as it's clever, compact and
    > static.
    >
    > All-dynamic allocator for on-stack cpumasks ... is a less obvious
    > choice.

    Sorry, I was unclear. "long-term" == "more than 4096 CPUs", since I thought
    that was Mike's aim. If we only want to hack up 4k CPUS and stop, then I
    understand the current approach.

    If we want huge cpu numbers, I think cpumask_alloc/free gives the clearest
    code. So our approach is backwards: let's do that *then* put ugly hacks in
    if it's really too slow.

    Cheers,
    Rusty.


    \
     
     \ /
      Last update: 2008-07-28 15:25    [W:0.019 / U:267.272 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site