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author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-11-01 16:15:42 -1000 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-11-01 16:15:42 -1000 |
commit | 05bf73aa27ba89474763cea7b9cd2626eda61e01 (patch) | |
tree | 0430a2d85df344f59030ac518a696a63139bfafd /samples | |
parent | 1b10d2c8c6219bfc86d8c7d53a4f97a0a706d1ba (diff) | |
parent | 4758560fa268cecfa1144f015aa9f2525d164b7e (diff) | |
download | lwn-05bf73aa27ba89474763cea7b9cd2626eda61e01.tar.gz lwn-05bf73aa27ba89474763cea7b9cd2626eda61e01.zip |
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
Diffstat (limited to 'samples')
-rw-r--r-- | samples/kprobes/kretprobe_example.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c index cbf16542d84e..ed79fd3d48fb 100644 --- a/samples/kprobes/kretprobe_example.c +++ b/samples/kprobes/kretprobe_example.c @@ -35,7 +35,7 @@ struct my_data { ktime_t entry_stamp; }; -/* Here we use the entry_hanlder to timestamp function entry */ +/* Here we use the entry_handler to timestamp function entry */ static int entry_handler(struct kretprobe_instance *ri, struct pt_regs *regs) { struct my_data *data; |