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| author |  SeongJae Park <sj@kernel.org>
| 2023-09-07 02:29:22 +0000 |
|---|---|---|
| committer |  Andrew Morton <akpm@linux-foundation.org>
| 2023-10-04 10:32:21 -0700 |
| commit | 24df886f9f32087ba70d95a03a11c23db171a756 (patch) | |
| tree | cd44222675ade4e344e265ddc103a79678c0b090 /Documentation/mm | |
| parent | Docs/admin-guide/mm/damon/usage: move debugfs intro to the bottom of the section (diff) | |
| download | linux-24df886f9f32087ba70d95a03a11c23db171a756.tar.gz linux-24df886f9f32087ba70d95a03a11c23db171a756.tar.bz2 linux-24df886f9f32087ba70d95a03a11c23db171a756.zip | |
Docs/mm/damon/design: explicitly introduce ``nr_accesses``
The design document is explaining about the access tracking mechanism
and the access rate counter (nr_accesses), but not directly mentions the
name. Add a sentence for making it clear.
Link: https://lkml.kernel.org/r/20230907022929.91361-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/mm')
| -rw-r--r-- | Documentation/mm/damon/design.rst | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index a20383d01a95..5c465835a44f 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -163,9 +163,10 @@ assumption (pages in a region have the same access frequencies) is kept, only one page in the region is required to be checked. Thus, for each ``sampling interval``, DAMON randomly picks one page in each region, waits for one ``sampling interval``, checks whether the page is accessed meanwhile, and -increases the access frequency of the region if so. Therefore, the monitoring -overhead is controllable by setting the number of regions. DAMON allows users -to set the minimum and the maximum number of regions for the trade-off. +increases the access frequency counter of the region if so. The counter is +called ``nr_regions`` of the region. Therefore, the monitoring overhead is +controllable by setting the number of regions. DAMON allows users to set the +minimum and the maximum number of regions for the trade-off. This scheme, however, cannot preserve the quality of the output if the assumption is not guaranteed. |