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Documentation/vm/page_owner.rst: update the documentation
Update the documentation of ``page_owner``. [akpm@linux-foundation.org: small grammatical tweaks] Link: https://lkml.kernel.org/r/20211214134736.2569-1-hanshenghong2019@email.szu.edu.cn Signed-off-by: Shenghong Han <hanshenghong2019@email.szu.edu.cn> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Georgi Djakov <georgi.djakov@linaro.org> Cc: Liam Mark <lmark@codeaurora.org> Cc: Tang Bin <tangbin@cmss.chinamobile.com> Cc: Zhang Shengju <zhangshengju@cmss.chinamobile.com> Cc: Zhenliang Wei <weizhenliang@huawei.com> Cc: Xiaoming Ni <nixiaoming@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -97,7 +97,7 @@ Usage
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The ``page_owner_sort`` tool ignores ``PFN`` rows, puts the remaining rows
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in buf, uses regexp to extract the page order value, counts the times
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and pages of buf, and finally sorts them according to the times.
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and pages of buf, and finally sorts them according to the parameter(s).
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See the result about who allocated each page
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in the ``sorted_page_owner.txt``. General output::
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@ -107,4 +107,23 @@ Usage
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// Detailed stack
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By default, ``page_owner_sort`` is sorted according to the times of buf.
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If you want to sort by the pages nums of buf, use the ``-m`` parameter.
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If you want to sort by the page nums of buf, use the ``-m`` parameter.
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The detailed parameters are:
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fundamental function:
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Sort:
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-a Sort by memory allocation time.
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-m Sort by total memory.
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-p Sort by pid.
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-r Sort by memory release time.
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-s Sort by stack trace.
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-t Sort by times (default).
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additional function:
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Cull:
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-c Cull by comparing stacktrace instead of total block.
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Filter:
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-f Filter out the information of blocks whose memory has not been released.
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