Linus Torvalds 34232fcfe9 Tracing updates for 6.6: ... User visible changes: - Added a way to easier filter with cpumasks: # echo 'cpumask & CPUS{17-42}' > /sys/kernel/tracing/events/ipi_send_cpumask/filter - Show actual size of ring buffer after modifying the ring buffer size via buffer_size_kb. Currently it just returns what was written, but the actual size rounds up to the sub buffer size. Show that real size instead. Major changes: - Added "eventfs". This is the code that handles the inodes and dentries of tracefs/events directory. As there are thousands of events, and each event has several inodes and dentries that currently exist even when tracing is never used, they take up precious memory. Instead, eventfs will allocate the inodes and dentries in a JIT way (similar to what procfs does). There is now metadata that handles the events and subdirectories, and will create the inodes and dentries when they are used. Note, I also have patches that remove the subdirectory meta data, but will wait till the next merge window before applying them. It's a little more complex, and I want to make sure the dynamic code works properly before adding more complexity, making it easier to revert if need be. Minor changes: - Optimization to user event list traversal. - Remove intermediate permission of tracefs files (note the intermediate permission removes all access to the files so it is not a security concern, but just a clean up.) - Add the complex fix to FORTIFY_SOURCE to the kernel stack event logic. - Other minor clean ups. -----BEGIN PGP SIGNATURE----- iQJIBAABCgAyFiEEXtmkj8VMCiLR0IBM68Js21pW3nMFAmTwtAsUHHJvc3RlZHRA Z29vZG1pcy5vcmcACgkQ68Js21pW3nNOXRAAsslQT6alY4OeplC4x47+V6+6NiIA oDtOmWAqf7TsH9bukzRFD36rUly42O20RJDx9z0Q3iRc3vGxEawId8z6P0HmBwRb VSl5BryWvL5Wc5w94xS8EeCuC1MRfhVDyfbtVFmWigzfvd/f+hp71ViMPHUvrRJX KhzzNSBc4ir5E1lzfwa7meYTXzDwrQlZbYfdf5aH94IWAkqDj85PUZDJ7UmLZhXG CIglSpNFXZ0j19Wo/U6KZlHR1XfunBKungCzJ5Dbznc9YLWZTQXOIZF4YPKfPIJL ulRG9chwXY0nQWhG3xM1UHZLsAMSWw5i13a4ZN4d8FCNOgv8ttcJnfDk7ZYUS0Oz RmY1dGcSRKAZTUTjm8ZBtmyiUCc9kZAIk0fyEfIHtoDYXmhnvni3wuTnbRSdXaSi q4YkxPaLfX8Fn3QloCqqddt8iONu7BnbpZOhUCl2AtBib52gnTTF7+rQ6/0D3rjo SSuvEHhnjJhzk+3jM2odxjmTAztNT+yu6FbKXZUKPt1Kj9YHv1J9cEQw9/Etw+GV 8jQBe979D8hFJmDOJOT/O/TdPqE9mQoMNBt6Y8QnE4nbJWM+i/MBrThFpUSQhRCr 0Ya/HgR2QyRH7RmZW5o2H9mNtN+V9c7RxZW8erYzRbUs0YofK2OpGi9SrPzxWCke w6j0VVZHaxdPguM= =/s+e -----END PGP SIGNATURE----- Merge tag 'trace-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing updates from Steven Rostedt: "User visible changes: - Added a way to easier filter with cpumasks: # echo 'cpumask & CPUS{17-42}' > /sys/kernel/tracing/events/ipi_send_cpumask/filter - Show actual size of ring buffer after modifying the ring buffer size via buffer_size_kb. Currently it just returns what was written, but the actual size rounds up to the sub buffer size. Show that real size instead. Major changes: - Added "eventfs". This is the code that handles the inodes and dentries of tracefs/events directory. As there are thousands of events, and each event has several inodes and dentries that currently exist even when tracing is never used, they take up precious memory. Instead, eventfs will allocate the inodes and dentries in a JIT way (similar to what procfs does). There is now metadata that handles the events and subdirectories, and will create the inodes and dentries when they are used. Note, I also have patches that remove the subdirectory meta data, but will wait till the next merge window before applying them. It's a little more complex, and I want to make sure the dynamic code works properly before adding more complexity, making it easier to revert if need be. Minor changes: - Optimization to user event list traversal - Remove intermediate permission of tracefs files (note the intermediate permission removes all access to the files so it is not a security concern, but just a clean up) - Add the complex fix to FORTIFY_SOURCE to the kernel stack event logic - Other minor cleanups" * tag 'trace-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (29 commits) tracefs: Remove kerneldoc from struct eventfs_file tracefs: Avoid changing i_mode to a temp value tracing/user_events: Optimize safe list traversals ftrace: Remove empty declaration ftrace_enable_daemon() and ftrace_disable_daemon() tracing: Remove unused function declarations tracing/filters: Document cpumask filtering tracing/filters: Further optimise scalar vs cpumask comparison tracing/filters: Optimise CPU vs cpumask filtering when the user mask is a single CPU tracing/filters: Optimise scalar vs cpumask filtering when the user mask is a single CPU tracing/filters: Optimise cpumask vs cpumask filtering when user mask is a single CPU tracing/filters: Enable filtering the CPU common field by a cpumask tracing/filters: Enable filtering a scalar field by a cpumask tracing/filters: Enable filtering a cpumask field by another cpumask tracing/filters: Dynamically allocate filter_pred.regex test: ftrace: Fix kprobe test for eventfs eventfs: Move tracing/events to eventfs eventfs: Implement removal of meta data from eventfs eventfs: Implement functions to create files and dirs when accessed eventfs: Implement eventfs lookup, read, open functions eventfs: Implement eventfs file add functions ...		2023-09-01 16:34:25 -07:00
..
event_inode.c	tracefs: Remove kerneldoc from struct eventfs_file	2023-08-22 09:05:24 -04:00
inode.c	Tracing updates for 6.6:	2023-09-01 16:34:25 -07:00
internal.h	eventfs: Implement functions to create files and dirs when accessed	2023-07-30 18:13:34 -04:00
Makefile	eventfs: Implement eventfs dir creation functions	2023-07-30 18:13:33 -04:00