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Commit 0c803ec1 authored by Charan Teja Reddy's avatar Charan Teja Reddy
Browse files

soc: qcom: memoffline: use a freezable unbounded workqueue for migration 



Use freezable unbounded workqueue for reverse migration of the pages in
the system. This helps in avoiding the watchdog timeouts while executing
the suspend2idle usecases which expectation is to finish in 14secs.

Also, add the support to know if there are any pending requests for
reverse migration to take better decissions from userspace.

Change-Id: Iada770799936c4d6110310e48f96a6f1dc4725cf
Signed-off-by: default avatarCharan Teja Reddy <charante@codeaurora.org>
parent 1ea05851

drivers/soc/qcom/mem-offline.c

+18 −2
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ static u32 offline_granule; 
static bool is_rpm_controller;

static bool has_pend_offline_req;

static atomic_long_t totalram_pages_with_offline = ATOMIC_INIT(0);

static struct workqueue_struct *migrate_wq;



#define MODULE_CLASS_NAME	"mem-offline"

#define MIGRATE_TIMEOUT_SEC	(20)
@@ -970,6 +971,13 @@ static ssize_t show_mem_stats(struct kobject *kobj, 
static struct kobj_attribute stats_attr =

		__ATTR(stats, 0444, show_mem_stats, NULL);



static ssize_t show_anon_migrate(struct kobject *kobj,

					struct kobj_attribute *attr, char *buf)

{

	return scnprintf(buf, PAGE_SIZE, "%lu\n",

				atomic_read(&target_migrate_pages));

}



static ssize_t store_anon_migrate(struct kobject *kobj,

				struct kobj_attribute *attr, const char *buf,

				size_t size)
@@ -983,7 +991,7 @@ static ssize_t store_anon_migrate(struct kobject *kobj, 
	atomic_add(val, &target_migrate_pages);



	if (!work_pending(&fill_movable_zone_work))

		queue_work(system_unbound_wq, &fill_movable_zone_work);

		queue_work(migrate_wq, &fill_movable_zone_work);



	return size;

}
@@ -992,7 +1000,7 @@ static struct kobj_attribute offline_granule_attr = 
		__ATTR(offline_granule, 0444, show_mem_offline_granule, NULL);



static struct kobj_attribute anon_migration_size_attr =

		__ATTR(anon_migrate, 0220, NULL, store_anon_migrate);

		__ATTR(anon_migrate, 0644, show_anon_migrate, store_anon_migrate);



static struct attribute *mem_root_attrs[] = {

		&stats_attr.attr,
@@ -1123,6 +1131,14 @@ static int mem_offline_driver_probe(struct platform_device *pdev) 
	if (bypass_send_msg)

		pr_info("mem-offline: bypass mode\n");



	migrate_wq = alloc_workqueue("reverse_migrate_wq",

					WQ_UNBOUND | WQ_FREEZABLE, 0);

	if (!migrate_wq) {

		pr_err("Failed to create the worker for reverse migration\n");

		ret = -ENOMEM;

		goto err_sysfs_remove_group;

	}



	return 0;



err_sysfs_remove_group: