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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: Dmitry 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: Andrew Morton <akpm@linux-foundation.org>
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@ -5339,6 +5339,7 @@ L: linux-mm@kvack.org
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S: Maintained
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S: Maintained
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F: mm/memcontrol.c
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F: mm/memcontrol.c
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F: mm/swap_cgroup.c
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F: mm/swap_cgroup.c
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F: samples/cgroup/*
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F: tools/testing/selftests/cgroup/memcg_protection.m
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F: tools/testing/selftests/cgroup/memcg_protection.m
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F: tools/testing/selftests/cgroup/test_hugetlb_memcg.c
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F: tools/testing/selftests/cgroup/test_hugetlb_memcg.c
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F: tools/testing/selftests/cgroup/test_kmem.c
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F: tools/testing/selftests/cgroup/test_kmem.c
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@ -285,6 +285,12 @@ config SAMPLE_KMEMLEAK
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Build a sample program which have explicitly leaks memory to test
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Build a sample program which have explicitly leaks memory to test
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kmemleak
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kmemleak
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config SAMPLE_CGROUP
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bool "Build cgroup sample code"
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depends on CGROUPS && CC_CAN_LINK && HEADERS_INSTALL
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help
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Build samples that demonstrate the usage of the cgroup API.
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source "samples/rust/Kconfig"
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source "samples/rust/Kconfig"
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endif # SAMPLES
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endif # SAMPLES
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@ -3,6 +3,7 @@
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subdir-$(CONFIG_SAMPLE_AUXDISPLAY) += auxdisplay
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subdir-$(CONFIG_SAMPLE_AUXDISPLAY) += auxdisplay
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subdir-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs
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subdir-$(CONFIG_SAMPLE_ANDROID_BINDERFS) += binderfs
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subdir-$(CONFIG_SAMPLE_CGROUP) += cgroup
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obj-$(CONFIG_SAMPLE_CONFIGFS) += configfs/
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obj-$(CONFIG_SAMPLE_CONFIGFS) += configfs/
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obj-$(CONFIG_SAMPLE_CONNECTOR) += connector/
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obj-$(CONFIG_SAMPLE_CONNECTOR) += connector/
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obj-$(CONFIG_SAMPLE_FANOTIFY_ERROR) += fanotify/
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obj-$(CONFIG_SAMPLE_FANOTIFY_ERROR) += fanotify/
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5
samples/cgroup/Makefile
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5
samples/cgroup/Makefile
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@ -0,0 +1,5 @@
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# SPDX-License-Identifier: GPL-2.0
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userprogs-always-y += cgroup_event_listener
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userccflags += -I usr/include
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@ -1,11 +0,0 @@
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# SPDX-License-Identifier: GPL-2.0
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# Makefile for cgroup tools
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CFLAGS = -Wall -Wextra
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all: cgroup_event_listener
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%: %.c
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$(CC) $(CFLAGS) -o $@ $^
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clean:
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$(RM) cgroup_event_listener
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