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Milk-V Jupiter Linux kernel
ab9bda001b
Patch series "Extend DAMOS filters for address ranges and DAMON monitoring targets" There are use cases that need to apply DAMOS schemes to specific address ranges or DAMON monitoring targets. NUMA nodes in the physical address space, special memory objects in the virtual address space, and monitoring target specific efficient monitoring results snapshot retrieval could be examples of such use cases. This patchset extends DAMOS filters feature for such cases, by implementing two more filter types, namely address ranges and DAMON monitoring types. Patches sequence ---------------- The first seven patches are for the address ranges based DAMOS filter. The first patch implements the filter feature and expose it via DAMON kernel API. The second patch further expose the feature to users via DAMON sysfs interface. The third and fourth patches implement unit tests and selftests for the feature. Three patches (fifth to seventh) updating the documents follow. The following six patches are for the DAMON monitoring target based DAMOS filter. The eighth patch implements the feature in the core layer and expose it via DAMON's kernel API. The ninth patch further expose it to users via DAMON sysfs interface. Tenth patch add a selftest, and two patches (eleventh and twelfth) update documents. [1] https://lore.kernel.org/damon/20230728203444.70703-1-sj@kernel.org/ This patch (of 13): Users can know special characteristic of specific address ranges. NUMA nodes or special objects or buffers in virtual address space could be such examples. For such cases, DAMOS schemes could required to be applied to only specific address ranges. Implement yet another type of DAMOS filter for the purpose. Note that the existing filter types, namely anon pages and memcg DAMOS filters needed page level type check. Because such check can be done efficiently in the opertions set layer, those filters are handled in operations set layer. Specifically, only paddr operations set implementation supports these filters. Also, because statistics counting is done in the DAMON core layer, the regions that filtered out by these filters are counted as tried but failed to the statistics. Unlike those, address range based filters can efficiently handled in the core layer. Hence, do the handling in the layer, and count the regions that filtered out by those as the scheme has not tried for the region. This difference should clearly documented. Link: https://lkml.kernel.org/r/20230802214312.110532-1-sj@kernel.org Link: https://lkml.kernel.org/r/20230802214312.110532-2-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Brendan Higgins <brendanhiggins@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.