git: kernel - Probable fix to vm_fault: PG_BUSY panic on i386

[Matthew Dillon]

commit 39efc5438c7934e9f191c1840d5f184a3ab7506d
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Wed Oct 10 14:47:57 2012 -0700

    kernel - Probable fix to vm_fault: PG_BUSY panic on i386
    
    * The info structure for the pmap_inval*() API is only initialized
      conditionally as an optimization.
    
    * There was a case where the info structure was being used without
      first being initialized which matches reported panics (essentially
      a pipe buffer page in kernel memory is swapped out and the faulted back
      in during a uiomove).
    
    Reported-by: vsrinivas, marino, several others

Summary of changes:
 sys/platform/pc32/i386/pmap.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/39efc5438c7934e9f191c1840d5f184a3ab7506d


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