/share/man/man9/pmap_is_modified.9

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  2. .\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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  28. .Dd July 21, 2003
    29. 

  29. .Dt PMAP_IS_MODIFIED 9
    30. 

  30. .Os
    31. 

  31. .Sh NAME
    32. 

  32. .Nm pmap_is_modified ,
    33. 

  33. .Nm pmap_ts_modified
    34. 

  34. .Nd return information about physical pages
    35. 

  35. .Sh SYNOPSIS
    36. 

  36. .In sys/param.h
    37. 

  37. .In vm/vm.h
    38. 

  38. .In vm/pmap.h
    39. 

  39. .Ft boolean_t
    40. 

  40. .Fn pmap_is_modified "vm_page_t m"
    41. 

  41. .Ft int
    42. 

  42. .Fn pmap_ts_referenced "vm_page_t m"
    43. 

  43. .Sh DESCRIPTION
    44. 

  44. The
    45. 

  45. .Fn pmap_is_modified
    46. 

  46. and
    47. 

  47. .Fn pmap_ts_referenced
    48. 

  48. functions return information about physical pages.
    49. 

  49. .Sh RETURN VALUES
    50. 

  50. The
    51. 

  51. .Fn pmap_is_modified
    52. 

  52. function returns the status of the
    53. 

  53. .Dq "page modified"
    54. 

  54. bit for the physical page
    55. 

  55. .Fa m .
    56. 

  56. .Pp
    57. 

  57. The
    58. 

  58. .Fn pmap_ts_referenced
    59. 

  59. function returns a count of reference bits for a page
    60. 

  60. .Fa m ,
    61. 

  61. clearing those bits.
    62. 

  62. It is not necessary for every reference bit to be cleared, but it is
    63. 

  63. necessary that 0 only be returned when there are no remaining reference
    64. 

  64. bits set on the page.
    65. 

  65. .Sh SEE ALSO
    66. 

  66. .Xr pmap 9 ,
    67. 

  67. .Xr pmap_clear_modify 9 ,
    68. 

  68. .Xr pmap_clear_reference 9
    69. 

  69. .Sh AUTHORS
    70. 

  70. This manual page was written by
    71. 

  71. .An Bruce M Simpson Aq bms@spc.org .
    72.