git: hammer2 kernel - Fix i386 pmap bug

Matthew Dillon dillon at
Thu Oct 11 14:35:41 PDT 2012

commit bcff90f20d5c407526e833b406327339cdbc3322
Author: Matthew Dillon <dillon at>
Date:   Thu Oct 11 14:34:09 2012 -0700

    kernel - Fix i386 pmap bug
    * mpte will be NULL for KVM page table pages, there is no need to track
      the wire count.  Conditionalize-out the unwiring call.
    * This is believed to be (this time for sure to the third power!) the
      PG_BUSY crash that vsrinivas was getting on i386 related to paging
      in a swapped kernel pipe buffer.

Summary of changes:
 sys/platform/pc32/i386/pmap.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

DragonFly BSD source repository

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