Merge tag 'docs-6.1-2' of git://git.lwn.net/linux

[linux-block.git] / Documentation / mm / page_owner.rst

diff --git a/Documentation/mm/page_owner.rst b/Documentation/mm/page_owner.rst
index f1efbb414ea6836f9e14a417dcfb819c647bc6b5..127514955a5e8021b1fe5ed8d1fe63b80c03679b 100644 (file)
--- a/Documentation/mm/page_owner.rst
+++ b/Documentation/mm/page_owner.rst
@@ -82,6 +82,11 @@ Usage
        Page allocated via order XXX, ...
        PFN XXX ...
        // Detailed stack
+    By default, it will do full pfn dump, to start with a given pfn,
+    page_owner supports fseek.
+
+    FILE *fp = fopen("/sys/kernel/debug/page_owner", "r");
+    fseek(fp, pfn_start, SEEK_SET);
 
    The ``page_owner_sort`` tool ignores ``PFN`` rows, puts the remaining rows
    in buf, uses regexp to extract the page order value, counts the times