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60433a9d03
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>
302 lines
9.2 KiB
Text
302 lines
9.2 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig SAMPLES
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bool "Sample kernel code"
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help
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You can build and test sample kernel code here.
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if SAMPLES
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config SAMPLE_AUXDISPLAY
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bool "auxdisplay sample"
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depends on CC_CAN_LINK
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config SAMPLE_TRACE_EVENTS
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tristate "Build trace_events examples -- loadable modules only"
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depends on EVENT_TRACING && m
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help
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This builds the trace event example module.
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config SAMPLE_TRACE_CUSTOM_EVENTS
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tristate "Build custom trace event example -- loadable modules only"
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depends on EVENT_TRACING && m
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help
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This builds the custom trace event example module.
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config SAMPLE_TRACE_PRINTK
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tristate "Build trace_printk module - tests various trace_printk formats"
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depends on EVENT_TRACING && m
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help
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This builds a module that calls trace_printk() and can be used to
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test various trace_printk() calls from a module.
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config SAMPLE_FTRACE_DIRECT
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tristate "Build register_ftrace_direct() example"
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depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m
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depends on HAVE_SAMPLE_FTRACE_DIRECT
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help
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This builds an ftrace direct function example
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that hooks to wake_up_process and prints the parameters.
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config SAMPLE_FTRACE_DIRECT_MULTI
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tristate "Build register_ftrace_direct() on multiple ips example"
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depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m
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depends on HAVE_SAMPLE_FTRACE_DIRECT_MULTI
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help
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This builds an ftrace direct function example
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that hooks to wake_up_process and schedule, and prints
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the function addresses.
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config SAMPLE_FTRACE_OPS
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tristate "Build custom ftrace ops example"
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depends on FUNCTION_TRACER
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help
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This builds an ftrace ops example that hooks two functions and
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measures the time taken to invoke one function a number of times.
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config SAMPLE_TRACE_ARRAY
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tristate "Build sample module for kernel access to Ftrace instancess"
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depends on EVENT_TRACING && m
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help
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This builds a module that demonstrates the use of various APIs to
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access Ftrace instances from within the kernel.
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config SAMPLE_KOBJECT
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tristate "Build kobject examples"
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help
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This config option will allow you to build a number of
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different kobject sample modules showing how to use kobjects,
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ksets, and ktypes properly.
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If in doubt, say "N" here.
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config SAMPLE_KPROBES
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tristate "Build kprobes examples -- loadable modules only"
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depends on KPROBES && m
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help
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This build several kprobes example modules.
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config SAMPLE_KRETPROBES
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tristate "Build kretprobes example -- loadable modules only"
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default m
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depends on SAMPLE_KPROBES && KRETPROBES
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config SAMPLE_HW_BREAKPOINT
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tristate "Build kernel hardware breakpoint examples -- loadable module only"
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depends on HAVE_HW_BREAKPOINT && m
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help
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This builds kernel hardware breakpoint example modules.
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config SAMPLE_FPROBE
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tristate "Build fprobe examples -- loadable modules only"
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depends on FPROBE && m
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help
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This builds a fprobe example module. This module has an option 'symbol'.
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You can specify a probed symbol or symbols separated with ','.
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config SAMPLE_KFIFO
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tristate "Build kfifo examples -- loadable modules only"
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depends on m
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help
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This config option will allow you to build a number of
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different kfifo sample modules showing how to use the
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generic kfifo API.
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If in doubt, say "N" here.
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config SAMPLE_KDB
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tristate "Build kdb command example -- loadable modules only"
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depends on KGDB_KDB && m
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help
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Build an example of how to dynamically add the hello
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command to the kdb shell.
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config SAMPLE_QMI_CLIENT
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tristate "Build qmi client sample -- loadable modules only"
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depends on m
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depends on ARCH_QCOM
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depends on NET
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select QCOM_QMI_HELPERS
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help
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Build an QMI client sample driver, which demonstrates how to
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communicate with a remote QRTR service, using QMI encoded messages.
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config SAMPLE_RPMSG_CLIENT
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tristate "Build rpmsg client sample -- loadable modules only"
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depends on RPMSG && m
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help
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Build an rpmsg client sample driver, which demonstrates how
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to communicate with an AMP-configured remote processor over
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the rpmsg bus.
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config SAMPLE_LIVEPATCH
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tristate "Build live patching samples -- loadable modules only"
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depends on LIVEPATCH && m
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help
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Build sample live patch demonstrations.
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config SAMPLE_CONFIGFS
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tristate "Build configfs patching sample -- loadable modules only"
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depends on CONFIGFS_FS && m
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help
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Builds a sample configfs interface.
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config SAMPLE_CONNECTOR
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tristate "Build connector sample -- loadable modules only"
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depends on CONNECTOR && HEADERS_INSTALL && m
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help
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When enabled, this builds both a sample kernel module for
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the connector interface and a user space tool to communicate
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with it.
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See also Documentation/driver-api/connector.rst
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config SAMPLE_FANOTIFY_ERROR
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bool "Build fanotify error monitoring sample"
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depends on FANOTIFY && CC_CAN_LINK && HEADERS_INSTALL
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help
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When enabled, this builds an example code that uses the
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FAN_FS_ERROR fanotify mechanism to monitor filesystem
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errors.
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See also Documentation/admin-guide/filesystem-monitoring.rst.
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config SAMPLE_HIDRAW
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bool "hidraw sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_LANDLOCK
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bool "Landlock example"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build a simple Landlock sandbox manager able to start a process
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restricted by a user-defined filesystem access control policy.
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config SAMPLE_PIDFD
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bool "pidfd sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_SECCOMP
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bool "Build seccomp sample code"
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depends on SECCOMP_FILTER && CC_CAN_LINK && HEADERS_INSTALL
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help
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Build samples of seccomp filters using various methods of
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BPF filter construction.
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config SAMPLE_TIMER
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bool "Timer sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_UHID
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bool "UHID sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build UHID sample program.
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config SAMPLE_VFIO_MDEV_MTTY
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tristate "Build VFIO mtty example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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help
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Build a virtual tty sample driver for use as a VFIO
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mediated device
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config SAMPLE_VFIO_MDEV_MDPY
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tristate "Build VFIO mdpy example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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help
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Build a virtual display sample driver for use as a VFIO
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mediated device. It is a simple framebuffer and supports
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the region display interface (VFIO_GFX_PLANE_TYPE_REGION).
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config SAMPLE_VFIO_MDEV_MDPY_FB
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tristate "Build VFIO mdpy example guest fbdev driver"
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depends on FB
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select FB_IOMEM_HELPERS
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help
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Guest fbdev driver for the virtual display sample driver.
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config SAMPLE_VFIO_MDEV_MBOCHS
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tristate "Build VFIO mbochs example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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select DMA_SHARED_BUFFER
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help
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Build a virtual display sample driver for use as a VFIO
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mediated device. It supports the region display interface
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(VFIO_GFX_PLANE_TYPE_DMABUF).
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Emulate enough of qemu stdvga to make bochs-drm.ko happy.
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That is basically the vram memory bar and the bochs dispi
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interface vbe registers in the mmio register bar.
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Specifically it does *not* include any legacy vga stuff.
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Device looks a lot like "qemu -device secondary-vga".
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config SAMPLE_ANDROID_BINDERFS
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bool "Build Android binderfs example"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Builds a sample program to illustrate the use of the Android binderfs
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filesystem.
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config SAMPLE_VFS
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bool "Build example programs that use new VFS system calls"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build example userspace programs that use new VFS system calls such
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as mount API and statx(). Note that this is restricted to the x86
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arch whilst it accesses system calls that aren't yet in all arches.
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config SAMPLE_INTEL_MEI
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bool "Build example program working with intel mei driver"
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depends on INTEL_MEI
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build a sample program to work with mei device.
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config SAMPLE_TPS6594_PFSM
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bool "Build example program working with TPS6594 PFSM driver"
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depends on HEADERS_INSTALL
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depends on CC_CAN_LINK
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help
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Build a sample program to work with PFSM devices.
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config SAMPLE_WATCHDOG
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bool "watchdog sample"
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depends on CC_CAN_LINK
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config SAMPLE_WATCH_QUEUE
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bool "Build example watch_queue notification API consumer"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build example userspace program to use the new mount_notify(),
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sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.
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config SAMPLE_CORESIGHT_SYSCFG
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tristate "Build example loadable module for CoreSight config"
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depends on CORESIGHT && m
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help
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Build an example loadable module that adds new CoreSight features
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and configuration using the CoreSight system configuration API.
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This demonstrates how a user may create their own CoreSight
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configurations and easily load them into the system at runtime.
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config SAMPLE_KMEMLEAK
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tristate "Simple test for the kernel memory leak detector"
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depends on DEBUG_KMEMLEAK && m
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help
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Build a sample program which have explicitly leaks memory to test
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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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endif # SAMPLES
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config HAVE_SAMPLE_FTRACE_DIRECT
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bool
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config HAVE_SAMPLE_FTRACE_DIRECT_MULTI
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bool
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