mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-22 09:34:56 +02:00
Jiri Olsa
2b506f20af
Alexei hit following rcu warning when running prog_test -j. [ 128.049567] WARNING: suspicious RCU usage [ 128.049569] 6.1.0-rc2 #912 Tainted: G O ... [ 128.050944] kprobe_multi_link_handler+0x6c/0x1d0 [ 128.050947] ? kprobe_multi_link_handler+0x42/0x1d0 [ 128.050950] ? __cpuidle_text_start+0x8/0x8 [ 128.050952] ? __cpuidle_text_start+0x8/0x8 [ 128.050958] fprobe_handler.part.1+0xac/0x150 [ 128.050964] 0xffffffffa02130c8 [ 128.050991] ? default_idle+0x5/0x20 [ 128.050998] default_idle+0x5/0x20 It's caused by bench test attaching kprobe_multi link to default_idle function, which is not executed in rcu safe context so the kprobe handler on top of it will trigger the rcu warning. Filtering out default_idle function from the bench test. Reported-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Link: https://lore.kernel.org/r/20221116100228.2064612-1-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.