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authorTobias Klauser <tobias.klauser@uzh.ch>2013-05-02 08:58:28 +0200
committerTobias Klauser <tobias.klauser@uzh.ch>2013-05-02 08:58:28 +0200
commitc29c3fc0ccbae648b0c5d60e1b452f6e4379d3cb (patch)
tree8d4b86e94a25702295b78eb9ca00f17d615e235b /data/random/045.csv
parentf7a05ac4cef7af38a733a1909c6b2a45d4c9c16a (diff)
Final version of reportHEADmaster
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0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-05 11:27:33 +0000
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tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/events/thp.h')