• Kai-Heng Feng's avatar
    nvme: relax APST default max latency to 100ms · 9947d6a0
    Kai-Heng Feng authored
    Christoph Hellwig suggests we should to make APST work out of the box.
    Hence relax the the default max latency to make them able to enter
    deepest power state on default.
    
    Here are id-ctrl excerpts from two high latency NVMes:
    
    vid     : 0x14a4
    ssvid   : 0x1b4b
    mn      : CX2-GB1024-Q11 NVMe LITEON 1024GB
    ps    3 : mp:0.1000W non-operational enlat:5000 exlat:5000 rrt:3 rrl:3
              rwt:3 rwl:3 idle_power:- active_power:-
    ps    4 : mp:0.0100W non-operational enlat:50000 exlat:100000 rrt:4 rrl:4
              rwt:4 rwl:4 idle_power:- active_power:-
    
    vid     : 0x15b7
    ssvid   : 0x1b4b
    mn      : A400 NVMe SanDisk 512GB
    ps    3 : mp:0.0500W non-operational enlat:51000 exlat:10000 rrt:0 rrl:0
              rwt:0 rwl:0 idle_power:- active_power:-
    ps    4 : mp:0.0055W non-operational enlat:1000000 exlat:100000 rrt:0 rrl:0
              rwt:0 rwl:0 idle_power:- active_power:-
    Signed-off-by: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    9947d6a0
core.c 63.4 KB