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| author | Luca Abeni | 2017-05-18 22:13:32 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2017-06-08 10:31:51 +0200 |
| commit | 4da3abcefe178c650033f371e94fa10e80bce167 (patch) | |
| tree | 12d6b708fa1911e1053f85a0b29aab5bd41767f2 /Documentation/serial | |
| parent | sched/deadline: Implement GRUB accounting (diff) | |
| download | kernel-qcow2-linux-4da3abcefe178c650033f371e94fa10e80bce167.tar.gz kernel-qcow2-linux-4da3abcefe178c650033f371e94fa10e80bce167.tar.xz kernel-qcow2-linux-4da3abcefe178c650033f371e94fa10e80bce167.zip | |
sched/deadline: Do not reclaim the whole CPU bandwidth
Original GRUB tends to reclaim 100% of the CPU time... And this
allows a CPU hog to starve non-deadline tasks.
To address this issue, allow the scheduler to reclaim only a
specified fraction of CPU time, stored in the new "bw_ratio"
field of the dl runqueue structure.
Tested-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Luca Abeni <luca.abeni@santannapisa.it>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Claudio Scordino <claudio@evidence.eu.com>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>
Link: http://lkml.kernel.org/r/1495138417-6203-6-git-send-email-luca.abeni@santannapisa.it
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/serial')
0 files changed, 0 insertions, 0 deletions