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From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 5 May 2007 21:13:16 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: RELENG_6
Cc: 
Subject: cvs commit: src/sys/amd64/amd64 mp_machdep.c pmap.c
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alc         2007-05-05 21:13:16 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/amd64/amd64      mp_machdep.c pmap.c 
  Log:
  MFC
    Acquiring smp_ipi_mtx on every call to pmap_invalidate_*() is wasteful.
    For example, during a buildworld more than half of the calls do not
    generate an IPI because the only TLB entry invalidated is on the calling
    processor.  This revision pushes down the acquisition and release of
    smp_ipi_mtx into smp_tlb_shootdown() and smp_targeted_tlb_shootdown() and
    instead uses sched_pin() and sched_unpin() in pmap_invalidate_*() so that
    thread migration doesn't lead to a missed TLB invalidation.
  
  Revision    Changes    Path
  1.260.2.11  +8 -2      src/sys/amd64/amd64/mp_machdep.c
  1.516.2.15  +8 -64     src/sys/amd64/amd64/pmap.c