linux-kernel - [PATCH v4 0/3] nvme: Add sysfs interface for APST configuration management

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Message-ID: <tencent_A9D89C90E6484E0EBFED4F67D6EF4589F506@qq.com>
Date: Thu,  3 Apr 2025 15:21:02 +0800
From: Yaxiong Tian <iambestgod@...com>
To: kbusch@...nel.org,
	axboe@...nel.dk,
	hch@....de,
	sagi@...mberg.me,
	chaitanyak@...dia.com
Cc: linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Yaxiong Tian <tianyaxiong@...inos.cn>
Subject: [PATCH v4 0/3] nvme: Add sysfs interface for APST configuration management

From: Yaxiong Tian <tianyaxiong@...inos.cn>

This series enhances NVMe APST (Autonomous Power State Transition) support by:
1. Adding warnings for PST table allocation failures
2. Exposing APST tables via sysfs for runtime inspection
3. Providing per-controller sysfs interface for APST configuration

The changes allow better visibility and control of power management settings
through userspace tools while maintaining the existing functionality.

Yaxiong Tian (3):
  nvme: Add warning for PST table memory allocation failure in
    nvme_configure_apst
  nvme: add sysfs interface for APST table updates
  nvme: add per-controller sysfs interface for APST configuration

Changes in v2

Add mutex_lock in nvme_set_latency_tolerance() for Potential competition 
between nvme_set_latency_tolerance() and apst_update_store().

Changes in v3
In  PACH nvme: add sysfs interface for APST table updates,Add why dynamic APST 
updates are needed in the commit message, fix code formatting issues. 

https://lore.kernel.org/all/tencent_4612952C8C5109058CD8E688D81276A2FD0A@qq.com/

Changes in v4
Avoid the overly long line in patch (nvme: Add warning for PST table memory allocation 
failure in nvme_configure_apst)

 drivers/nvme/host/core.c  | 24 ++++++++++------
 drivers/nvme/host/nvme.h  |  6 ++++
 drivers/nvme/host/sysfs.c | 59 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+), 8 deletions(-)

-- 
2.25.1