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2026-01-31Docs/admin-guide/mm/damon/usage: update stats update process for refresh_msSeongJae Park
DAMOS stats on sysfs was only manually updated. Recent addition of 'refresh_ms' knob enabled periodic and automated updates of the stats. The document for stats update process is not updated for the change, however. Update. Link: https://lkml.kernel.org/r/20260118180305.70023-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-31Docs/admin-guide/mm/damon/usage: introduce DAMON modules at the beginningSeongJae Park
DAMON usage document provides a list of available DAMON interfaces with brief introduction at the beginning of the doc. The list is missing DAMON modules for special purposes, while it is one of the major suggested interfaces. Add an item for those to the list. Link: https://lkml.kernel.org/r/20260118180305.70023-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-26Docs/admin-guide/mm/damon/lru_sort: document intervals autotuningSeongJae Park
Document a newly added DAMON_LRU_SORT module parameter for using monitoring intervals auto-tuning feature of DAMON. Link: https://lkml.kernel.org/r/20260113152717.70459-12-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: wang lian <lianux.mm@gmail.com> Cc: David Hildenbrand <david@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-26Docs/admin-guide/mm/damon/lru_sort: document active_mem_bp parameterSeongJae Park
Document a newly added DAMON_LRU_SORT parameter for doing auto-tuning aiming an active to inactive memory size ratio. Link: https://lkml.kernel.org/r/20260113152717.70459-10-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: wang lian <lianux.mm@gmail.com> Cc: David Hildenbrand <david@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-26Docs/admin-guide/mm/damon/lru_sort: document filter_young_pagesSeongJae Park
Document the new DAMON_LRU_SORT parameter, filter_young_pages. It can be used to use page level access re-check for the LRU sorting. Link: https://lkml.kernel.org/r/20260113152717.70459-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Acked-by: wang lian <lianux.mm@gmail.com> Cc: David Hildenbrand <david@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-20Docs/admin-guide/mm/damon/usage: update for max_nr_snapshotsSeongJae Park
Update DAMON usage document for the newly added DAMON sysfs interface file, max_nr_snapshots. Link: https://lkml.kernel.org/r/20251216080128.42991-11-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2026-01-20Docs/admin-guide/mm/damon/usage: update for nr_snapshots damos statSeongJae Park
Update DAMON usage document for the newly added damos stat, nr_snapshots. Link: https://lkml.kernel.org/r/20251216080128.42991-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/usage: document obsolete_target fileSeongJae Park
Document the newly added obsolete_target DAMON sysfs file. Link: https://lkml.kernel.org/r/20251023012535.69625-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Reviewed-by: Bijan Tabatabai <bijan311@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/stat: document negative idle timeSeongJae Park
Commit a983a26d5298 ("mm/damon/stat: expose negative idle time") introduced the negative idle time feature for DAMON_STAT. But it is not documented. Document it on the usage document. Link: https://lkml.kernel.org/r/20251026182216.118200-9-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/stat: document aggr_interval_us parameterSeongJae Park
Commit cc7ceb1d14b0 ("mm/damon/stat: expose the current tuned aggregation interval"), has introduced 'aggr_interval_us' parameter for DAMON_STAT. But the new parameter is not yet documented. Document it on the usage document for the module. Link: https://lkml.kernel.org/r/20251026182216.118200-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/lru_sort: document addr_unit parameterSeongJae Park
Commit 2e0fe9245d6b ("mm/damon/lru_sort: support addr_unit for DAMON_LRU_SORT") introduced the 'addr_unit' parameter for DAMON_LRU_SORT. But the usage document is not updated for that. Update the document. Link: https://lkml.kernel.org/r/20251026182216.118200-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/reclaim: document addr_unit parameterSeongJae Park
Commit 7db551fcfb2a ("mm/damon/reclaim: support addr_unit for DAMON_RECLAIM") introduced the 'addr_unit' parameter for DAMON_RECLAIM. But the usage document is not updated for that. Update the document. Link: https://lkml.kernel.org/r/20251026182216.118200-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/usage: document empty target regions commit behaviorSeongJae Park
Committing a monitoring target with empty target regions is for keeping the current monitoring results. This behavior was introduced by commit 973233600676 ("mm/damon/sysfs: update monitoring target regions for online input commit"). The behavior is not documented, though. Update the usage document for clarifying this behavior. Link: https://lkml.kernel.org/r/20251026182216.118200-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/stat: fix a typo: s/sampling events/sampling interval/SeongJae Park
It is a contextual typo. Fix it. Link: https://lkml.kernel.org/r/20251026182216.118200-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Docs/admin-guide/mm/damon/usage: document DAMOS quota goal path fileSeongJae Park
A new DAMON sysfs interface file, namely 'path' has been added under DAMOS quota goal directory, for specifying the cgroup for DAMOS_QUOTA_NODE_MEMCG_{USED,FREE}_BP metrics. Document it on the usage document. Link: https://lkml.kernel.org/r/20251017212706.183502-10-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-10-03Merge tag 'docs-6.18' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation updates from Jonathan Corbet: "It has been a relatively busy cycle in docsland, with changes all over: - Bring the kernel memory-model docs into the Sphinx build in the "literal include" mode. - Lots of build-infrastructure work, further cleaning up long-term kernel-doc technical debt. The sphinx-pre-install tool has been converted to Python and updated for current systems. - A new tool to detect when documents have been moved and generate HTML redirects; this can be used on kernel.org (or any other site hosting the rendered docs) to avoid breaking links. - Automated processing of the YAML files describing the netlink protocol. - A significant update of the maintainer's PGP guide. ... and a seemingly endless series of typo fixes, build-problem fixes, etc" * tag 'docs-6.18' of git://git.lwn.net/linux: (193 commits) Documentation/features: Update feature lists for 6.17-rc7 docs: remove cdomain.py Documentation/process: submitting-patches: fix typo in "were do" docs: dev-tools/lkmm: Fix typo of missing file extension Documentation: trace: histogram: Convert ftrace docs cross-reference Documentation: trace: histogram-design: Wrap introductory note in note:: directive Documentation: trace: historgram-design: Separate sched_waking histogram section heading and the following diagram Documentation: trace: histogram-design: Trim trailing vertices in diagram explanation text Documentation: trace: histogram: Fix histogram trigger subsection number order docs: driver-api: fix spelling of "buses". Documentation: fbcon: Use admonition directives Documentation: fbcon: Reindent 8th step of attach/detach/unload Documentation: fbcon: Add boot options and attach/detach/unload section headings docs: filesystems: sysfs: add remaining top level sysfs directory descriptions docs: filesystems: sysfs: clarify symlink destinations in dev and bus/devices descriptions docs: filesystems: sysfs: remove top level sysfs net directory docs: maintainer: Fix ambiguous subheading formatting docs: kdoc: a few more dump_typedef() tweaks docs: kdoc: remove redundant comment stripping in dump_typedef() docs: kdoc: remove some dead code in dump_typedef() ...
2025-09-21Docs/admin-guide/mm/damon/start: add --target_pid to DAMOS example commandSeongJae Park
The example command doesn't work [1] on the latest DAMON user-space tool, since --damos_action option is updated to receive multiple arguments, and hence cannot know if the final argument is for deductible monitoring target or an argument for --damos_action option. Add --target_pid option to let damo understand it is for target pid. Link: https://lkml.kernel.org/r/20250916032339.115817-5-sj@kernel.org Link: https://github.com/damonitor/damo/pull/32 [2] Signed-off-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Joshua Hahn <joshua.hahnjy@gmail.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-09-13Docs/admin-guide/mm/damon/usage: document addr_unit fileSeongJae Park
Document addr_unit DAMON sysfs file on DAMON usage document. Link: https://lkml.kernel.org/r/20250828171242.59810-10-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Quanmin Yan <yanquanmin1@huawei.com> Reviewed-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: ze zuo <zuoze1@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-08-18Documentation: Fix admin-guide typosBjorn Helgaas
Fix typos. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20250813200526.290420-4-helgaas@kernel.org
2025-07-24Docs/admin-guide/mm/damon/usage: document refresh_ms fileSeongJae Park
Document the new DAMON sysfs file, refresh_ms, on the usage document. Link: https://lkml.kernel.org/r/20250717055448.56976-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-07-19Docs/admin-guide/mm/damon/usage: document dests directorySeongJae Park
Document the newly added DAMOS action destination directory of the DAMON sysfs interface on the usage document. Link: https://lkml.kernel.org/r/20250709005952.17776-7-bijan311@gmail.com Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Bijan Tabatabai <bijantabatab@micron.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-07-09Docs/admin-guide/mm/damon: add DAMON_STAT usage documentSeongJae Park
Document DAMON_STAT usage and add a link to it on DAMON admin-guide page. Link: https://lkml.kernel.org/r/20250604183127.13968-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-05-22Docs/damon: update titles and brief introductions to explain DAMOSSeongJae Park
DAMON was initially developed only for data access monitoring, and then extended for not only access monitoring but also access-aware system operations (DAMOS). But the documents have old titles and brief introductions for only the monitoring part. Update the titles and the brief introductions to explain DAMOS part together. Link: https://lkml.kernel.org/r/20250513002715.40126-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Brendan Higgins <brendan.higgins@linux.dev> Cc: David Gow <davidgow@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-05-12Docs/admin-guide/mm/damon/usage: document 'nid' fileSeongJae Park
Add description of 'nid' file, which is optionally used for specific DAMOS quota goal metrics such as node_mem_{used,free}_bp on DAMON usage document. Link: https://lkml.kernel.org/r/20250420194030.75838-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Yunjeong Mun <yunjeong.mun@sk.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-17Docs/admin-guide/mm/damon/usage: update for {core,ops}_filters directoriesSeongJae Park
Document {core,ops}_filters directories on usage document. Link: https://lkml.kernel.org/r/20250305222733.59089-9-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-17Docs/admin-guide/mm/damon/usage: add intervals_goal directory on the hierarchySeongJae Park
Document DAMON sysfs interface usage for DAMON sampling and aggregation intervals auto-tuning. Link: https://lkml.kernel.org/r/20250303221726.484227-9-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-16Docs/damon: move DAMOS filter type names and meaning to design docSeongJae Park
DAMON sysfs usage doc is describing DAMOS filter type names and their meanings in short. The design doc is providing the short meaning and detailed descriptions, too. This is unnecessary duplicates and confuses where to document new DAMOS filter types and features. Move the details from usage to design doc. Link: https://lkml.kernel.org/r/20250218223708.53437-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-03-16Docs/admin-guide/mm/damon/usage: document hugepage_size filter typeUsama Arif
This includes both the 'hugepage_size' filter type and the min/max files used to decide range of sizes to filter on. Link: https://lkml.kernel.org/r/20250211124437.278873-5-usamaarif642@gmail.com Signed-off-by: Usama Arif <usamaarif642@gmail.com> Reviewed-by: SeongJae Park <sj@kernel.org> Cc: David Hildenbrand <david@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/start: update snapshot exampleSeongJae Park
Two of DAMON user-space tool (damo) commands that are used for examples on DAMON getting started document, namely 'damo show' and 'damo report heats' are deprecated[1,2], and replaced by new commands that provides same functions with unified and simplified user interfaces. Also the example output of 'damo show' is outdated. 'damo schemes' command is not deprecated, but users are recommended to use 'damo start' or 'damo tune' instead. Update the examples to use the replacements, recommendations, and up-to-date output formats. [1] https://git.kernel.org/sj/damo/c/3272e0ac94ecc5e1 [2] https://git.kernel.org/sj/damo/c/da3ec66bbdd9e87d Link: https://lkml.kernel.org/r/20250110185232.54907-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Honggyu Kim <honggyu.kim@sk.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Yunjeong Mun <yunjeong.mun@sk.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: fix and add missing DAMOS filter sysfs ↵SeongJae Park
files on files hierarchy DAMOS filter directory part of DAMON sysfs files hierarchy on the usage document is wrong. 'memcg_path' file under the directory is wrongly written as 'memcg_id'. Also the directory has 'addr_start', 'addr_end', and 'target_idx' files, but the list is missing those. Fix the wrong name and add missing files. Link: https://lkml.kernel.org/r/20250110185232.54907-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Honggyu Kim <honggyu.kim@sk.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Yunjeong Mun <yunjeong.mun@sk.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: document DAMOS filter 'allow' sysfs fileSeongJae Park
Update DAMON usage document for the newly added 'allow' sysfs file for DAMOS filters. Link: https://lkml.kernel.org/r/20250109175126.57878-11-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: omit DAMOS filter details in favor of ↵SeongJae Park
design doc DAMON usage document is describing some details about DAMOS filters, which are also documented on the design doc. Deduplicate the details in favor of the design doc. Link: https://lkml.kernel.org/r/20250109175126.57878-10-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: remove DAMON debugfs interface documentationSeongJae Park
It's time to remove DAMON debugfs interface, which has deprecated long before in February 2023. Read the cover letter of this patch series for more details. Remove DAMON debugfs interface usage documentation, to avoid confusing users with documents for an already removed thing. Link: https://lkml.kernel.org/r/20250106191941.107070-3-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Alex Shi <alexs@kernel.org> Cc: Brendan Higgins <brendan.higgins@linux.dev> Cc: David Gow <davidgow@google.com> Cc: Hu Haowen <2023002089@link.tyut.edu.cn> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Rae Moar <rmoar@google.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Yanteng Si <si.yanteng@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: document sz_filtered_out of scheme tried ↵SeongJae Park
region directories Document the newly added DAMON sysfs interface file for per-scheme-tried region's bytes that passed the operations set handling DAMOS filters. Link: https://lkml.kernel.org/r/20250106193401.109161-16-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: document sz_ops_filter_passedSeongJae Park
Document the new per-scheme operations set layer-handled DAMOS filters passed bytes statistic file on DAMON sysfs interface usage document. Link: https://lkml.kernel.org/r/20250106193401.109161-11-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-01-25Docs/admin-guide/mm/damon/usage: link damos stat design docSeongJae Park
DAMON sysfs usage document focuses on usage, rather than the detail of the stat metric itself. Add a link to the design document on DAMOS stat usage section. Link: https://lkml.kernel.org/r/20250106193401.109161-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-09-09Docs/damon: use damonitor GitHub organization instead of awslabsSeongJae Park
Patch series "Docs/damon: update GitHub repo URLs and maintainer-profile". Replace GitHub URLS on DAMON documents for none-kernel parts DAMON repos with new ones[1] via the first patch. With following two patches, wordsmith maitnainer-profile for better readability, and document the Google clendsar for bi-weekly meetups, respectively. [1] https://lore.kernel.org/20240813232158.83903-1-sj@kernel.org This patch (of 3): GitHub repos for non-kernel parts of DAMON project including 'damo', 'damon-tests' and 'damoos' will be moved[1] from 'awslabs' org to 'damonitor', by 2024-09-05. Update related URLs in kernel tree. [1] https://lore.kernel.org/20240813232158.83903-1-sj@kernel.org Link: https://lkml.kernel.org/r/20240826015741.80707-1-sj@kernel.org Link: https://lkml.kernel.org/r/20240826015741.80707-2-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Alex Shi <alexs@kernel.org> Cc: Hu Haowen <2023002089@link.tyut.edu.cn> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-07-10Docs/admin-guide/mm/damon/start: add access pattern snapshot exampleSeongJae Park
DAMON user-space tool (damo) provides access pattern snapshot feature, which is expected to be frequently used for real time access pattern analysis. The snapshot output is also showing what DAMON provides on its own, including the 'age' information. In contrast, the recorded access patterns, which is shown as an example usage on the quick start section, shows what users can make from what DAMON provided. It includes information that generated outside of DAMON and makes the 'age' concept bit unclear. Hence snapshot output is easier at understanding the raw realtime output of DAMON. Add the snapshot usage example on the quick start section. Link: https://lkml.kernel.org/r/20240701192706.51415-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-07-03Docs/damon: document damos_migrate_{hot,cold}Honggyu Kim
This patch adds damon description for "migrate_hot" and "migrate_cold" actions for both usage and design documents as long as a new "target_nid" knob to set the migration target node. [sj@kernel.org: trivial fixups for DAMOS_MIGRATE_{HOT,COLD} documentation] Link: https://lkml.kernel.org/r/20240618213630.84846-2-sj@kernel.org Link: https://lkml.kernel.org/r/20240614030010.751-8-honggyu.kim@sk.com Signed-off-by: Honggyu Kim <honggyu.kim@sk.com> Signed-off-by: SeongJae Park <sj@kernel.org>Reviewed-by: SeongJae Park <sj@kernel.org> Cc: Gregory Price <gregory.price@memverge.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Hyeongtak Ji <hyeongtak.ji@sk.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Rakie Kim <rakie.kim@sk.com> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-11Docs/admin-guide/mm/damon/usage: fix wrong schemes effective quota update ↵SeongJae Park
command To update effective size quota of DAMOS schemes on DAMON sysfs file interface, user should write 'update_schemes_effective_quotas' to the kdamond 'state' file. But the document is mistakenly saying the input string as 'update_schemes_effective_bytes'. Fix it (s/bytes/quotas/). Link: https://lkml.kernel.org/r/20240503180318.72798-8-sj@kernel.org Fixes: a6068d6dfa2f ("Docs/admin-guide/mm/damon/usage: document effective_bytes file") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: <stable@vger.kernel.org> [6.9.x] Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-11Docs/admin-guide/mm/damon/usage: fix wrong example of DAMOS filter matching ↵SeongJae Park
sysfs file The example usage of DAMOS filter sysfs files, specifically the part of 'matching' file writing for memcg type filter, is wrong. The intention is to exclude pages of a memcg that already getting enough care from a given scheme, but the example is setting the filter to apply the scheme to only the pages of the memcg. Fix it. Link: https://lkml.kernel.org/r/20240503180318.72798-7-sj@kernel.org Fixes: 9b7f9322a530 ("Docs/admin-guide/mm/damon/usage: document DAMOS filters of sysfs") Closes: https://lore.kernel.org/r/20240317191358.97578-1-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: <stable@vger.kernel.org> [6.3.x] Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-05Docs/admin-guide/mm/damon/usage: update for young page type DAMOS filterSeongJae Park
Update DAMON usage document for the newly added DAMOS filter type, 'young page'. Link: https://lkml.kernel.org/r/20240426195247.100306-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Honggyu Kim <honggyu.kim@sk.com> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-23Docs/admin-guide/mm/damon/reclaim: document auto-tuning parametersSeongJae Park
Update DAMON_RECLAIM usage document for the user/self feedback based auto-tuning of the quota. Link: https://lkml.kernel.org/r/20240219194431.159606-21-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-23Docs/admin-guide/mm/damon/usage: document quota goal metric fileSeongJae Park
Update DAMON usage document for the quota goal target_metric file. [sj@kernel.org: fix a typo on the auto-tuning design reference link] Link: https://lkml.kernel.org/r/20240221170852.55529-3-sj@kernel.org Link: https://lkml.kernel.org/r/20240219194431.159606-18-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-23Docs/admin-guide/mm/damon/usage: document effective_bytes fileSeongJae Park
Update DAMON usage document for the effective quota file of the DAMON sysfs interface. Link: https://lkml.kernel.org/r/20240219194431.159606-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Docs/admin-guide/mm/damon/usage: fix wrong quotas diabling conditionSeongJae Park
After the introduction of DAMOS quotas, DAMOS quotas is not disabled if both size and time quotas are zero but the quota goal is set. The new rule is also applied to DAMON sysfs interface, but the usage doc is not updated. Update it. Link: https://lkml.kernel.org/r/20240217005842.87348-6-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Docs/mm/damon: move monitoring target regions setup detail from the usage to ↵SeongJae Park
the design document Design doc is aimed to have all concept level details, while the usage doc is focused on only how the features can be used. Some details about monitoring target regions construction is on the usage doc. Move the details about the monitoring target regions construction differences for DAMON operations set from the usage to the design doc. Link: https://lkml.kernel.org/r/20240217005842.87348-5-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Docs/mm/damon: move DAMON operation sets list from the usage to the design ↵SeongJae Park
document The list of DAMON operation sets and their explanation, which may better to be on design document, is written on the usage document. Move the detail to design document and make the usage document only reference the design document. [sj@kernel.org: fix a typo on a reference link] Link: https://lkml.kernel.org/r/20240221170852.55529-2-sj@kernel.org Link: https://lkml.kernel.org/r/20240217005842.87348-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Docs/mm/damon: move the list of DAMOS actions to design docSeongJae Park
DAMOS operation actions are explained nearly twice on the DAMON usage document, once for the sysfs interface, and then again for the debugfs interface. Duplication is bad. Also it would better to keep this kind of concept level details in design document and keep the usage document small and focus on only the usage. Move the list to design document and update usage document to reference it. Link: https://lkml.kernel.org/r/20240217005842.87348-3-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22Docs/admin-guide/mm/damon/usage: update for monitor_on renamingSeongJae Park
Update DAMON debugfs interface sections on the usage document to reflect the fact that 'monitor_on' file has renamed to 'monitor_on_DEPRECATED'. Link: https://lkml.kernel.org/r/20240130013549.89538-9-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Alex Shi <alexs@kernel.org> Cc: Hu Haowen <2023002089@link.tyut.edu.cn> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Shuah Khan <shuah@kernel.org> Cc: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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