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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/mm/pagemap.rst | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/Documentation/admin-guide/mm/pagemap.rst b/Documentation/admin-guide/mm/pagemap.rst index f5f065c67615..f2817a801596 100644 --- a/Documentation/admin-guide/mm/pagemap.rst +++ b/Documentation/admin-guide/mm/pagemap.rst @@ -173,27 +173,6 @@ LRU related page flags The page-types tool in the tools/mm directory can be used to query the above flags. -Using pagemap to do something useful -==================================== - -The general procedure for using pagemap to find out about a process' memory -usage goes like this: - - 1. Read ``/proc/pid/maps`` to determine which parts of the memory space are - mapped to what. - 2. Select the maps you are interested in -- all of them, or a particular - library, or the stack or the heap, etc. - 3. Open ``/proc/pid/pagemap`` and seek to the pages you would like to examine. - 4. Read a u64 for each page from pagemap. - 5. Open ``/proc/kpagecount`` and/or ``/proc/kpageflags``. For each PFN you - just read, seek to that entry in the file, and read the data you want. - -For example, to find the "unique set size" (USS), which is the amount of -memory that a process is using that is not shared with any other process, -you can go through every map in the process, find the PFNs, look those up -in kpagecount, and tally up the number of pages that are only referenced -once. - Exceptions for Shared Memory ============================ |