[lkml]   [2006]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH 4/16] LTTng 0.6.36 for 2.6.18 : atomic UP operations on SMP
    On Fri, Nov 24, 2006 at 04:55:18PM -0500, Mathieu Desnoyers wrote:
    > This patch adds a UP flavor of SMP operations which is intended to provide
    > atomic modification of per-cpu data without suffering from the LOCK of memory
    > barrier performance cost. Note that extreme care must be taken when accessing
    > this data from different CPUs : smp_wmb() and smp_rmb() must be used
    > explicitely. As this last scenario happens very rarely in LTTng, it provides a

    We already have local_t in asm/local.h for this purposed. Unfortunately
    several architecture implementations are rather suboptimal, but I'm sure
    the architecture maintainers would be interested in patches to optimize
    the various implementations.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2006-11-27 17:59    [W:0.019 / U:17.544 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site