How to check whether physical page is in-use?

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
2
down vote

favorite
1












I am implementing kernel thread which scans whole physical pages in memory and inspect physical page frame numbers of in-used pages.
At first, I thought I can check whether specific page is used by PG_lru flag but the scan result came out strangely.



Is there other way to inspect page is in-use or free?



Should I have to check _mapcount field in struct page?



Please help me...
Thank you so much.







share|improve this question


























    up vote
    2
    down vote

    favorite
    1












    I am implementing kernel thread which scans whole physical pages in memory and inspect physical page frame numbers of in-used pages.
    At first, I thought I can check whether specific page is used by PG_lru flag but the scan result came out strangely.



    Is there other way to inspect page is in-use or free?



    Should I have to check _mapcount field in struct page?



    Please help me...
    Thank you so much.







    share|improve this question
























      up vote
      2
      down vote

      favorite
      1









      up vote
      2
      down vote

      favorite
      1






      1





      I am implementing kernel thread which scans whole physical pages in memory and inspect physical page frame numbers of in-used pages.
      At first, I thought I can check whether specific page is used by PG_lru flag but the scan result came out strangely.



      Is there other way to inspect page is in-use or free?



      Should I have to check _mapcount field in struct page?



      Please help me...
      Thank you so much.







      share|improve this question














      I am implementing kernel thread which scans whole physical pages in memory and inspect physical page frame numbers of in-used pages.
      At first, I thought I can check whether specific page is used by PG_lru flag but the scan result came out strangely.



      Is there other way to inspect page is in-use or free?



      Should I have to check _mapcount field in struct page?



      Please help me...
      Thank you so much.









      share|improve this question













      share|improve this question




      share|improve this question








      edited Mar 15 at 6:47









      Debian_yadav

      8342522




      8342522










      asked Mar 15 at 5:38









      JuHyung Son

      707




      707

























          active

          oldest

          votes











          Your Answer







          StackExchange.ready(function()
          var channelOptions =
          tags: "".split(" "),
          id: "106"
          ;
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function()
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled)
          StackExchange.using("snippets", function()
          createEditor();
          );

          else
          createEditor();

          );

          function createEditor()
          StackExchange.prepareEditor(
          heartbeatType: 'answer',
          convertImagesToLinks: false,
          noModals: false,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          );



          );








           

          draft saved


          draft discarded


















          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f430317%2fhow-to-check-whether-physical-page-is-in-use%23new-answer', 'question_page');

          );

          Post as a guest



































          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes










           

          draft saved


          draft discarded


























           


          draft saved


          draft discarded














          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f430317%2fhow-to-check-whether-physical-page-is-in-use%23new-answer', 'question_page');

          );

          Post as a guest













































































          Popular posts from this blog

          How to check contact read email or not when send email to Individual?

          Displaying single band from multi-band raster using QGIS

          How many registers does an x86_64 CPU actually have?