Commit 19d7c3ad authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
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samples: add a skeleton of a sample DAMON module for working set size estimation 

Patch series "mm/damon: add sample modules".

Implement a proactive cold memory regions reclaiming logic of prcl sample
module using DAMOS.  The logic treats memory regions that not accessed at
all for five or more seconds as cold, and reclaim those as soon as found.


This patch (of 5):

Add a skeleton for a sample DAMON static module that can be used for
estimating working set size of a given process.  Note that it is a static
module since DAMON is not exporting symbols to loadable modules for now. 
It exposes two module parameters, namely 'pid' and 'enable'.  'pid' will
specify the process that the module will estimate the working set size of.
'enable' will receive whether to start or stop the estimation.  Because
this is just a skeleton, the parameters do nothing, though.  The
functionalities will be implemented by following commits.

Link: https://lkml.kernel.org/r/20241210215030.85675-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20241210215030.85675-2-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 08cc4c39

MAINTAINERS

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@@ -6330,6 +6330,7 @@ F: Documentation/mm/damon/ 
F:	include/linux/damon.h

F:	include/trace/events/damon.h

F:	mm/damon/

F:	samples/damon/

F:	tools/testing/selftests/damon/









DAVICOM FAST ETHERNET (DMFE) NETWORK DRIVER
































samples/Kconfig



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@@ -293,6 +293,8 @@ config SAMPLE_CGROUP

















source "samples/rust/Kconfig"



















source "samples/damon/Kconfig"



















endif # SAMPLES



















config HAVE_SAMPLE_FTRACE_DIRECT
































samples/Makefile



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@@ -39,3 +39,4 @@ obj-$(CONFIG_SAMPLE_KMEMLEAK)		+= kmemleak/







obj-$(CONFIG_SAMPLE_CORESIGHT_SYSCFG)	+= coresight/









obj-$(CONFIG_SAMPLE_FPROBE)		+= fprobe/









obj-$(CONFIG_SAMPLES_RUST)		+= rust/









obj-$(CONFIG_SAMPLE_DAMON_WSSE)		+= damon/
























samples/damon/Kconfig
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# SPDX-License-Identifier: GPL-2.0



















menu "DAMON Samples"



















config SAMPLE_DAMON_WSSE









	bool "DAMON sameple module for working set size estimation"









	depends on DAMON && DAMON_VADDR









	help









	  This builds DAMON sample module for working set size estimation.



















	  The module receives a pid, monitor access to the virtual address









	  space of the process, estimate working set size of the process, and









	  repeatedly prints the size on the kernel log.



















	  If unsure, say N.



















endmenu
























samples/damon/Makefile
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# SPDX-License-Identifier: GPL-2.0



















obj-$(CONFIG_SAMPLE_DAMON_WSSE) += wsse.o