linux/samples
Linus Torvalds 05bf73aa27 Probes updates for v6.7:
- cleanups:
   . kprobes: Fixes typo in kprobes samples.
 
   . tracing/eprobes: Remove 'break' after return.
 
 - kretprobe/fprobe performance improvements:
   . lib: Introduce new `objpool`, which is a high performance lockless
     object queue. This uses per-cpu ring array to allocate/release
     objects from the pre-allocated object pool. Since the index of ring
     array is a 32bit sequential counter, we can retry to push/pop the
     object pointer from the ring without lock (as seq-lock does).
 
   . lib: Add an objpool test module to test the functionality and
     evaluate the performance under some circumstances.
 
   . kprobes/fprobe: Improve kretprobe and rethook scalability
     performance with objpool.
     This improves both legacy kretprobe and fprobe exit handler (which
     is based on rethook) to be scalable on SMP systems. Even with
     8-threads parallel test, it shows a great scalability improvement.
 
   . Remove unneeded freelist.h which is replaced by objpool.
 
   . objpool: Add maintainers entry for the objpool.
 
   . objpool: Fix to remove unused include header lines.
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Merge tag 'probes-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull probes updates from Masami Hiramatsu:
 "Cleanups:

   - kprobes: Fixes typo in kprobes samples

   - tracing/eprobes: Remove 'break' after return

  kretprobe/fprobe performance improvements:

   - lib: Introduce new `objpool`, which is a high performance lockless
     object queue. This uses per-cpu ring array to allocate/release
     objects from the pre-allocated object pool.

     Since the index of ring array is a 32bit sequential counter, we can
     retry to push/pop the object pointer from the ring without lock (as
     seq-lock does)

   - lib: Add an objpool test module to test the functionality and
     evaluate the performance under some circumstances

   - kprobes/fprobe: Improve kretprobe and rethook scalability
     performance with objpool.

     This improves both legacy kretprobe and fprobe exit handler (which
     is based on rethook) to be scalable on SMP systems. Even with
     8-threads parallel test, it shows a great scalability improvement

   - Remove unneeded freelist.h which is replaced by objpool

   - objpool: Add maintainers entry for the objpool

   - objpool: Fix to remove unused include header lines"

* tag 'probes-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  kprobes: unused header files removed
  MAINTAINERS: objpool added
  kprobes: freelist.h removed
  kprobes: kretprobe scalability improvement
  lib: objpool test module added
  lib: objpool added: ring-array based lockless MPMC
  tracing/eprobe: drop unneeded breaks
  samples: kprobes: Fixes a typo
2023-11-01 16:15:42 -10:00
..
acrn virt: acrn: Replace obsolete memalign() with posix_memalign() 2023-04-20 14:20:51 +02:00
auxdisplay .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
binderfs .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
bpf samples/bpf: Allow building with custom bpftool 2023-10-26 15:32:13 +02:00
configfs treewide: remove editor modelines and cruft 2021-05-07 00:26:34 -07:00
connector .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
coresight coresight: syscfg: Example CoreSight configuration loadable module 2021-11-26 11:34:07 -07:00
fanotify Add gitignore file for samples/fanotify/ subdirectory 2021-11-07 11:19:24 -08:00
fprobe fprobe: Pass return address to the handlers 2023-06-06 21:39:55 +09:00
ftrace samples: ftrace: Replace bti assembly with hint for older compiler 2023-08-21 22:03:58 -04:00
hid bpf: Replace deprecated -target with --target= for Clang 2023-06-29 15:46:17 +02:00
hidraw .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
hw_breakpoint samples/hw_breakpoint: mark sample_hbp as static 2023-07-26 11:17:19 -07:00
kdb kdb: Rename members of struct kdbtab_t 2021-07-27 17:05:06 +01:00
kfifo samples/kfifo: Rename read_lock/write_lock 2021-10-13 14:36:48 +02:00
kmemleak kmemleak-test: drop __init to get better backtrace 2023-06-09 16:25:40 -07:00
kobject samples/kobject: make kobj_type structure constant 2023-02-08 13:34:41 +01:00
kprobes samples: kprobes: Fixes a typo 2023-10-10 01:00:50 +09:00
landlock samples/landlock: Document best-effort approach for LANDLOCK_ACCESS_FS_REFER 2022-11-07 20:49:50 +01:00
livepatch livepatch: Reorder to use before freeing a pointer 2022-03-23 13:51:11 +01:00
mei samples: mei: don't wait on read completion upon write. 2021-08-01 09:54:22 +02:00
nitro_enclaves nitro_enclaves: Add fixes for checkpatch blank line reports 2021-09-14 11:11:20 +02:00
pfsm samples: Add userspace example for TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00
pidfd .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
pktgen samples: pktgen: fix append mode failed issue 2023-07-03 09:15:26 +01:00
qmi soc: qcom: qmi: use const for struct qmi_elem_info 2022-08-29 17:33:01 -05:00
rpmsg
rust samples: rust: print: Add sample code for Arc printing 2023-04-10 05:05:43 +02:00
seccomp samples/seccomp: Adjust sample to also provide kill option 2022-02-10 19:09:12 -08:00
timers .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
trace_events tracing: Fix cpumask() example typo 2022-12-14 11:17:55 -05:00
trace_printk
uhid
user_events tracing/user_events: Use write ABI in example 2023-03-29 06:52:09 -04:00
v4l treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_168.RULE (part 2) 2022-06-10 14:51:36 +02:00
vfio-mdev vfio/mtty: Enable migration support 2023-10-24 15:03:10 -06:00
vfs .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
watch_queue .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
watchdog .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig vfio-dev/mdpy-fb: Use fbdev I/O helpers 2023-08-04 15:54:39 +02:00
Makefile samples: Add userspace example for TI TPS6594 PFSM 2023-06-15 13:41:53 +02:00