vmscan.c (f661d007f40dffc719c1b2b1a636b759f87c4e78) vmscan.c (6b700b5b3c595594c7c0c608cfe903c4e3a0af2d)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/mm/vmscan.c
4 *
5 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
6 *
7 * Swap reorganised 29.12.95, Stephen Tweedie.
8 * kswapd added: 7.1.96 sct

--- 4016 unchanged lines hidden (view full) ---

4025 set_task_reclaim_state(current, NULL);
4026 memalloc_noreclaim_restore(noreclaim_flag);
4027 fs_reclaim_release(sc.gfp_mask);
4028
4029 return nr_reclaimed;
4030}
4031#endif /* CONFIG_HIBERNATION */
4032
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/mm/vmscan.c
4 *
5 * Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
6 *
7 * Swap reorganised 29.12.95, Stephen Tweedie.
8 * kswapd added: 7.1.96 sct

--- 4016 unchanged lines hidden (view full) ---

4025 set_task_reclaim_state(current, NULL);
4026 memalloc_noreclaim_restore(noreclaim_flag);
4027 fs_reclaim_release(sc.gfp_mask);
4028
4029 return nr_reclaimed;
4030}
4031#endif /* CONFIG_HIBERNATION */
4032
4033/* It's optimal to keep kswapds on the same CPUs as their memory, but
4034 not required for correctness. So if the last cpu in a node goes
4035 away, we get changed to run anywhere: as the first one comes back,
4036 restore their cpu bindings. */
4037static int kswapd_cpu_online(unsigned int cpu)
4038{
4039 int nid;
4040
4041 for_each_node_state(nid, N_MEMORY) {
4042 pg_data_t *pgdat = NODE_DATA(nid);
4043 const struct cpumask *mask;
4044
4045 mask = cpumask_of_node(pgdat->node_id);
4046
4047 if (cpumask_any_and(cpu_online_mask, mask) < nr_cpu_ids)
4048 /* One of our CPUs online: restore mask */
4049 set_cpus_allowed_ptr(pgdat->kswapd, mask);
4050 }
4051 return 0;
4052}
4053
4054/*
4055 * This kswapd start function will be called by init and node-hot-add.
4056 * On node-hot-add, kswapd will moved to proper cpus if cpus are hot-added.
4057 */
4058int kswapd_run(int nid)
4059{
4060 pg_data_t *pgdat = NODE_DATA(nid);
4061 int ret = 0;

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4085 if (kswapd) {
4086 kthread_stop(kswapd);
4087 NODE_DATA(nid)->kswapd = NULL;
4088 }
4089}
4090
4091static int __init kswapd_init(void)
4092{
4033/*
4034 * This kswapd start function will be called by init and node-hot-add.
4035 * On node-hot-add, kswapd will moved to proper cpus if cpus are hot-added.
4036 */
4037int kswapd_run(int nid)
4038{
4039 pg_data_t *pgdat = NODE_DATA(nid);
4040 int ret = 0;

--- 23 unchanged lines hidden (view full) ---

4064 if (kswapd) {
4065 kthread_stop(kswapd);
4066 NODE_DATA(nid)->kswapd = NULL;
4067 }
4068}
4069
4070static int __init kswapd_init(void)
4071{
4093 int nid, ret;
4072 int nid;
4094
4095 swap_setup();
4096 for_each_node_state(nid, N_MEMORY)
4097 kswapd_run(nid);
4073
4074 swap_setup();
4075 for_each_node_state(nid, N_MEMORY)
4076 kswapd_run(nid);
4098 ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
4099 "mm/vmscan:online", kswapd_cpu_online,
4100 NULL);
4101 WARN_ON(ret < 0);
4102 return 0;
4103}
4104
4105module_init(kswapd_init)
4106
4107#ifdef CONFIG_NUMA
4108/*
4109 * Node reclaim mode

--- 221 unchanged lines hidden --- 		4077 return 0;
4078}
4079
4080module_init(kswapd_init)
4081
4082#ifdef CONFIG_NUMA
4083/*
4084 * Node reclaim mode

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