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9947d6a09c
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: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.