ftrace updates for 7.1:

Browse source

- Speed up ftrace_lookup_symbols() for single lookups
 
   The kallsyms lookup in ftrace_lookup_symbols() does a linear search over
   each symbol. This is fine when it must match multiple strings, but when
   there's only a single string being searched for, using a binary search is
   much more efficient. When a single string is passed in to search, use the
   binary search method.
 -----BEGIN PGP SIGNATURE-----
 
 iIoEABYKADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCad4RehQccm9zdGVkdEBn
 b29kbWlzLm9yZwAKCRAp5XQQmuv6quZeAQD0rsWOGF0D970asst2WtCOoQF5G2ao
 l0ED7QZFoB1qcAEA7ZAuV9+zJwFOvhAekifuDEArPwpadlcUC4dU7tJU1w0=
 =cMjY
 -----END PGP SIGNATURE-----

Merge tag 'ftrace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull ftrace update from Steven Rostedt:

 - Speed up ftrace_lookup_symbols() for single lookups

   The kallsyms lookup in ftrace_lookup_symbols() does a linear search
   over each symbol. This is fine when it must match multiple strings,
   but when there's only a single string being searched for, using a
   binary search is much more efficient. When a single string is passed
   in to search, use the binary search method.

* tag 'ftrace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ftrace: Use kallsyms binary search for single-symbol lookup

...

This commit is contained in:

Linus Torvalds 2026-04-15 15:57:11 -07:00

parent aec2f682d4 93e8fd1a56

commit 1521829632

1 changed files with 22 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

22

kernel/trace/ftrace.c

View file