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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-05-23 12:47:45 +0300 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-05-24 11:21:18 +0300 |
commit | a61dec7447456858dfc88fe056017a91ab903ed0 (patch) | |
tree | cc296fea94a97c09349f4dbf057a61dd2b004f92 /include | |
parent | 152db033d77589df9ff1b93c1b311d4cd2e93bd0 (diff) | |
download | linux-a61dec7447456858dfc88fe056017a91ab903ed0.tar.xz |
cpufreq: schedutil: Avoid missing updates for one-CPU policies
Commit 152db033d775 (schedutil: Allow cpufreq requests to be made
even when kthread kicked) made changes to prevent utilization updates
from being discarded during processing a previous request, but it
left a small window in which that still can happen in the one-CPU
policy case. Namely, updates coming in after setting work_in_progress
in sugov_update_commit() and clearing it in sugov_work() will still
be dropped due to the work_in_progress check in sugov_update_single().
To close that window, rearrange the code so as to acquire the update
lock around the deferred update branch in sugov_update_single()
and drop the work_in_progress check from it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions