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| author | Thomas Gleixner <tglx@linutronix.de> | 2021-09-28 14:24:32 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-05 15:52:09 +0200 |
| commit | 8d491de6edc27138806cae6e8eca455beb325b62 (patch) | |
| tree | 63a9b2be7c7f2baacc8dfd695088634fd1c8d079 /arch/mips/vdso/Kconfig | |
| parent | d07b2eee4501c393cbf5bfcad36143310cfd72f9 (diff) | |
| download | linux-8d491de6edc27138806cae6e8eca455beb325b62.tar.gz linux-8d491de6edc27138806cae6e8eca455beb325b62.tar.bz2 linux-8d491de6edc27138806cae6e8eca455beb325b62.zip | |
sched: Move mmdrop to RCU on RT
mmdrop() is invoked from finish_task_switch() by the incoming task to drop
the mm which was handed over by the previous task. mmdrop() can be quite
expensive which prevents an incoming real-time task from getting useful
work done.
Provide mmdrop_sched() which maps to mmdrop() on !RT kernels. On RT kernels
it delagates the eventually required invocation of __mmdrop() to RCU.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210928122411.648582026@linutronix.de
Diffstat (limited to 'arch/mips/vdso/Kconfig')
0 files changed, 0 insertions, 0 deletions