mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-28 16:52:18 +00:00
bf52b1ac6a
Async can schedule a number of interdependent work items. However, since
5797b1c189 ("workqueue: Implement system-wide nr_active enforcement for
unbound workqueues"), unbound workqueues have separate min_active which sets
the number of interdependent work items that can be handled. This default
value is 8 which isn't sufficient for async and can lead to stalls during
resume from suspend in some cases.
Let's use a dedicated unbound workqueue with raised min_active.
Link: http://lkml.kernel.org/r/708a65cc-79ec-44a6-8454-a93d0f3114c3@samsung.com
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* async.h: Asynchronous function calls for boot performance
|
|
*
|
|
* (C) Copyright 2009 Intel Corporation
|
|
* Author: Arjan van de Ven <arjan@linux.intel.com>
|
|
*/
|
|
#ifndef __ASYNC_H__
|
|
#define __ASYNC_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/list.h>
|
|
#include <linux/numa.h>
|
|
#include <linux/device.h>
|
|
|
|
typedef u64 async_cookie_t;
|
|
typedef void (*async_func_t) (void *data, async_cookie_t cookie);
|
|
struct async_domain {
|
|
struct list_head pending;
|
|
unsigned registered:1;
|
|
};
|
|
|
|
/*
|
|
* domain participates in global async_synchronize_full
|
|
*/
|
|
#define ASYNC_DOMAIN(_name) \
|
|
struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
|
|
.registered = 1 }
|
|
|
|
/*
|
|
* domain is free to go out of scope as soon as all pending work is
|
|
* complete, this domain does not participate in async_synchronize_full
|
|
*/
|
|
#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
|
|
struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
|
|
.registered = 0 }
|
|
|
|
async_cookie_t async_schedule_node(async_func_t func, void *data,
|
|
int node);
|
|
async_cookie_t async_schedule_node_domain(async_func_t func, void *data,
|
|
int node,
|
|
struct async_domain *domain);
|
|
|
|
/**
|
|
* async_schedule - schedule a function for asynchronous execution
|
|
* @func: function to execute asynchronously
|
|
* @data: data pointer to pass to the function
|
|
*
|
|
* Returns an async_cookie_t that may be used for checkpointing later.
|
|
* Note: This function may be called from atomic or non-atomic contexts.
|
|
*/
|
|
static inline async_cookie_t async_schedule(async_func_t func, void *data)
|
|
{
|
|
return async_schedule_node(func, data, NUMA_NO_NODE);
|
|
}
|
|
|
|
/**
|
|
* async_schedule_domain - schedule a function for asynchronous execution within a certain domain
|
|
* @func: function to execute asynchronously
|
|
* @data: data pointer to pass to the function
|
|
* @domain: the domain
|
|
*
|
|
* Returns an async_cookie_t that may be used for checkpointing later.
|
|
* @domain may be used in the async_synchronize_*_domain() functions to
|
|
* wait within a certain synchronization domain rather than globally.
|
|
* Note: This function may be called from atomic or non-atomic contexts.
|
|
*/
|
|
static inline async_cookie_t
|
|
async_schedule_domain(async_func_t func, void *data,
|
|
struct async_domain *domain)
|
|
{
|
|
return async_schedule_node_domain(func, data, NUMA_NO_NODE, domain);
|
|
}
|
|
|
|
/**
|
|
* async_schedule_dev - A device specific version of async_schedule
|
|
* @func: function to execute asynchronously
|
|
* @dev: device argument to be passed to function
|
|
*
|
|
* Returns an async_cookie_t that may be used for checkpointing later.
|
|
* @dev is used as both the argument for the function and to provide NUMA
|
|
* context for where to run the function. By doing this we can try to
|
|
* provide for the best possible outcome by operating on the device on the
|
|
* CPUs closest to the device.
|
|
* Note: This function may be called from atomic or non-atomic contexts.
|
|
*/
|
|
static inline async_cookie_t
|
|
async_schedule_dev(async_func_t func, struct device *dev)
|
|
{
|
|
return async_schedule_node(func, dev, dev_to_node(dev));
|
|
}
|
|
|
|
bool async_schedule_dev_nocall(async_func_t func, struct device *dev);
|
|
|
|
/**
|
|
* async_schedule_dev_domain - A device specific version of async_schedule_domain
|
|
* @func: function to execute asynchronously
|
|
* @dev: device argument to be passed to function
|
|
* @domain: the domain
|
|
*
|
|
* Returns an async_cookie_t that may be used for checkpointing later.
|
|
* @dev is used as both the argument for the function and to provide NUMA
|
|
* context for where to run the function. By doing this we can try to
|
|
* provide for the best possible outcome by operating on the device on the
|
|
* CPUs closest to the device.
|
|
* @domain may be used in the async_synchronize_*_domain() functions to
|
|
* wait within a certain synchronization domain rather than globally.
|
|
* Note: This function may be called from atomic or non-atomic contexts.
|
|
*/
|
|
static inline async_cookie_t
|
|
async_schedule_dev_domain(async_func_t func, struct device *dev,
|
|
struct async_domain *domain)
|
|
{
|
|
return async_schedule_node_domain(func, dev, dev_to_node(dev), domain);
|
|
}
|
|
|
|
extern void async_synchronize_full(void);
|
|
extern void async_synchronize_full_domain(struct async_domain *domain);
|
|
extern void async_synchronize_cookie(async_cookie_t cookie);
|
|
extern void async_synchronize_cookie_domain(async_cookie_t cookie,
|
|
struct async_domain *domain);
|
|
extern bool current_is_async(void);
|
|
extern void async_init(void);
|
|
#endif
|