cvs commit: src/sys/kern sys_pipe.c

[Alan Cox]

alc         2003/08/10 17:17:44 PDT

  FreeBSD src repository

  Modified files:
    sys/kern             sys_pipe.c 
  Log:
  Use vm_page_hold() instead of vm_page_wire().  Otherwise, a multithreaded
  application could cause a wired page to be freed.  In general,
  vm_page_hold() should be preferred for ephemeral kernel mappings of pages
  borrowed from a user-level address space.  (vm_page_wire() should really be
  reserved for indefinite duration pinning by the "owner" of the page.)
  
  Discussed with: silby
  Submitted by:   tegge
  
  Revision  Changes    Path
  1.144     +3 -3      src/sys/kern/sys_pipe.c