mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-08 11:50:43 +09:00
1cdc6a7088
uclamp_fork() resets the uclamp values to their default when the reset-on-fork flag is set. It also checks whether the task has a RT policy, and sets its uclamp.min to 1024 accordingly. However, during reset-on-fork, the task's policy is lowered to SCHED_NORMAL right after, hence leading to an erroneous uclamp.min setting for the new task if it was forked from RT. Fix this by removing the unnecessary check on rt_task() in uclamp_fork() as this doesn't make sense if the reset-on-fork flag is set. [ qperret: BACKPORT because of a conflict with the Android-specific SUGOV_RT_MAX_FREQ sched_feat, which is equally unnecessary in this path ] Bug: 120440300 Fixes:1a00d99997("sched/uclamp: Set default clamps for RT tasks") Reported-by: Chitti Babu Theegala <ctheegal@codeaurora.org> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Patrick Bellasi <patrick.bellasi@matbug.net> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Link: https://lkml.kernel.org/r/20200416085956.217587-1-qperret@google.com (cherry picked from commiteaf5a92ebd) Signed-off-by: Quentin Perret <qperret@google.com> Change-Id: I9a19ac5474d0508b8437e4a1d859573b4106ed08