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    SubjectRe: [PATCH] x86: Reduce the default HZ value
    On Thu, 2009-05-07 at 13:20 -0400, Christoph Lameter wrote:
    > On Thu, 7 May 2009, Peter Zijlstra wrote:
    > > Another user is RCU, the grace period is tick driven, growing these
    > > ticks by a factor 50 or so might require some tinkering with forced
    > > grace periods when we notice our batch queues getting too long.
    > One could also schedule RCU via hrtimers with a large fuzz period?

    No, that's not the point, the longer these period are, the more
    callbacks you can accumulate in a period. You need a cap on the callback
    list, we already have seen DoS scenarios in this space.

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      Last update: 2009-05-07 19:43    [W:0.040 / U:10.536 seconds]
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