Hi! > Also adds a class type PM_QOS_SUM that aggregates the values by summing them. > > It can be used by memory controllers to calculate the optimum clock frequency > based on the bandwidth needs of the different memory clients. > > Signed-off-by: Tomeu Vizoso <tomeu.viz...@collabora.com> > --- > Documentation/power/pm_qos_interface.txt | 4 +++- > include/linux/pm_qos.h | 5 ++++- > kernel/power/qos.c | 27 ++++++++++++++++++++++++++- > 3 files changed, 33 insertions(+), 3 deletions(-) > > diff --git a/Documentation/power/pm_qos_interface.txt > b/Documentation/power/pm_qos_interface.txt > index a5da5c7..57782e8 100644 > --- a/Documentation/power/pm_qos_interface.txt > +++ b/Documentation/power/pm_qos_interface.txt > @@ -5,7 +5,8 @@ performance expectations by drivers, subsystems and user > space applications on > one of the parameters. > > Two different PM QoS frameworks are available: > -1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput. > +1. PM QoS classes for cpu_dma_latency, network_latency, network_throughput, > +memory_bandwidth. > 2. the per-device PM QoS framework provides the API to manage the per-device > latency > constraints and PM QoS flags. > > @@ -13,6 +14,7 @@ Each parameters have defined units: > * latency: usec > * timeout: usec > * throughput: kbs (kilo bit / sec) > + * memory bandwidth: kbs (kilo bit / sec)
Would mega bits per second make sense here? I suppose some many-core systems would have memory bandwith in > 10 terabit/sec, overflowing u32. Plus, if driver in 3/3 is just an example, perhaps comment should explain that clearly? Otherwise looks good, Acked-by: Pavel Machek <pa...@ucw.cz> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
