Commits
Thomas Renninger committed f9b9e806ae0
PM QoS: Make pm_qos settings readable I have a machine where entering deep C-states broke. pm_qos was a hot candidate, but I couldn't find any way to double check without the need of recompiling. While in this case it was a driver bug (ath9k): https://bugzilla.kernel.org/show_bug.cgi?id=27532 powertop or others may want to read out cpu_dma_latency restrictions which could be the cause of preventing a machine entering deeper C-states. Output with this patch: # default value of 2000 * USEC_PER_SEC (0x77359400) cat /dev/network_latency |hexdump 0000000 9400 7735 0000004 # value of 55 us which is the reason for not entering C2 cat /dev/cpu_dma_latency |hexdump 0000000 0037 0000 0000004 There is no reason to hide this info -> make pm_qos files readable. Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>