Commit 60433a9d authored by Dmitry Rokosov's avatar Dmitry Rokosov Committed by Andrew Morton
Browse files

samples: introduce new samples subdir for cgroup 

Patch series "samples: introduce cgroup events listeners", v3.

To begin with, this patch series relocates the cgroup example code to the
samples/cgroup directory, which is the appropriate location for such code
snippets.

Furthermore, a new memcg events listener is introduced.  This listener is
a simple yet effective tool for monitoring memory events and managing
counter changes during runtime.

Additionally, as per Andrew Morton's suggestion, a helpful reminder
comment is included in the memcontrol implementation.  This comment serves
to ensure that the samples code is updated whenever new events are added.


This patch (of 3):

Move the cgroup_event_listener for cgroup v1 to the samples directory. 
This suggestion was proposed by Andrew Morton during the discussion [1].

Link: https://lore.kernel.org/all/20231106140934.3f5d4960141562fe8da53906@linux-foundation.org/ [1]
Link: https://lkml.kernel.org/r/20231123071945.25811-1-ddrokosov@salutedevices.com
Link: https://lkml.kernel.org/r/20231123071945.25811-2-ddrokosov@salutedevices.com


Signed-off-by: default avatarDmitry Rokosov <ddrokosov@salutedevices.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent ebc20dca

MAINTAINERS

+1 −0
Original line number Diff line number Diff line
@@ -5339,6 +5339,7 @@ L: linux-mm@kvack.org 
S:	Maintained

F:	mm/memcontrol.c

F:	mm/swap_cgroup.c

F:	samples/cgroup/*

F:	tools/testing/selftests/cgroup/memcg_protection.m

F:	tools/testing/selftests/cgroup/test_hugetlb_memcg.c

F:	tools/testing/selftests/cgroup/test_kmem.c

samples/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -285,6 +285,12 @@ config SAMPLE_KMEMLEAK 
          Build a sample program which have explicitly leaks memory to test

          kmemleak



config SAMPLE_CGROUP

	bool "Build cgroup sample code"

	depends on CGROUPS && CC_CAN_LINK && HEADERS_INSTALL

	help

	  Build samples that demonstrate the usage of the cgroup API.



source "samples/rust/Kconfig"



endif # SAMPLES

samples/Makefile

+1 −0
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@@ -3,6 +3,7 @@ 


subdir-$(CONFIG_SAMPLE_AUXDISPLAY)	+= auxdisplay

subdir-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs

subdir-$(CONFIG_SAMPLE_CGROUP) += cgroup

obj-$(CONFIG_SAMPLE_CONFIGFS)		+= configfs/

obj-$(CONFIG_SAMPLE_CONNECTOR)		+= connector/

obj-$(CONFIG_SAMPLE_FANOTIFY_ERROR)	+= fanotify/

samples/cgroup/Makefile

0 → 100644
+5 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: GPL-2.0



userprogs-always-y += cgroup_event_listener



userccflags += -I usr/include