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author | Paul E. McKenney <paulmck@kernel.org> | 2021-06-10 09:24:43 -0700 |
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committer | Paul E. McKenney <paulmck@kernel.org> | 2021-07-06 12:38:08 -0700 |
commit | 05bc276cf243d90b9f1eb6ae2962f41eeb53a741 (patch) | |
tree | 526aac12edbbbbac524dba8fa4d43148b9bbd58c /fs/cifs | |
parent | 22b6d14992b733e9421a475f4d43df24629737ab (diff) | |
download | linux-05bc276cf243d90b9f1eb6ae2962f41eeb53a741.tar.bz2 |
refscale: Avoid false-positive warnings in ref_scale_reader()
If the call to set_cpus_allowed_ptr() in ref_scale_reader()
fails, a later WARN_ONCE() complains. But with the advent of
570a752b7a9b ("lib/smp_processor_id: Use is_percpu_thread() instead of
nr_cpus_allowed"), this complaint can be drowned out by complaints from
smp_processor_id(). The rationale for this change is that refscale's
kthreads are not marked with PF_NO_SETAFFINITY, which means that a system
administrator could change affinity at any time.
However, refscale is a performance/stress test, and the system
administrator might well have a valid test-the-test reason for changing
affinity. This commit therefore changes to raw_smp_processor_id()
in order to avoid the noise, and also adds a WARN_ON_ONCE() to the
call to set_cpus_allowed_ptr() in order to directly detect immediate
failure. There is no WARN_ON_ONCE() within the test loop, allowing
human-reflex-based affinity resetting, if desired.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'fs/cifs')
0 files changed, 0 insertions, 0 deletions