Paul, Kevin, On Mon, Dec 19, 2011 at 10:02 PM, Paul Walmsley <paul@xxxxxxxxx> wrote: > Hi Jean > > I'm really sorry it's taken me so long to do detailed review of these > patches for merging... anyway - > > On Wed, 14 Dec 2011, jean.pihet@xxxxxxxxxxxxxx wrote: > >> From: Jean Pihet <j-pihet@xxxxxx> >> >> . Implement the devices wake-up latency constraints using the global >> device PM QoS notification handler which applies the constraints to the >> underlying layer >> . Implement the low level code which controls the power domains next power >> states, through the hwmod and pwrdm layers >> . Add cpuidle and power domains wake-up latency figures for OMAP3, cf. >> comments in the code and [1] for the details on where the numbers >> are magically coming from >> . Implement the relation between the cpuidle and per-device PM QoS frameworks >> in the OMAP3 specific idle callbacks. >> The chosen C-state shall satisfy the following conditions: >> . the 'valid' field is enabled, >> . it satisfies the enable_off_mode flag, >> . the next state for MPU and CORE power domains is not lower than the >> state programmed by the per-device PM QoS. > > I've been reviewing these closely. It looks to me that are some issues > that need to be resolved before all of them are mergeable. > > One issue that I noticed in this series is that there are some locking > issues in patch 1. It looks to me that calls to > _pwrdm_wakeuplat_update_pwrst() can race with each other, since it's > called outside the lock? I fixed this by moving the lock so that it includes the update of the next power state. Speaking of the locking, currently a spinlock is used and it could be replaced by a more efficient mutex. This is ok at the condition that this code is not called from interrupt context? Kevin, Do you know if the per-device constraint code can be called from interrupt context? > ... > > > - Paul Jean _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
