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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-11-03 15:50:03 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-11-09 23:45:27 +0100 |
| commit | 517bbed90635a17cf27450fb385af0e502413bea (patch) | |
| tree | 9a4240dff8855a8275e6c89180a6c7267465fbad /mm/vmscan.c | |
| parent | 005fd4bbef168e9dea896085b001d64369e9834a (diff) | |
| download | linux-517bbed90635a17cf27450fb385af0e502413bea.tar.gz linux-517bbed90635a17cf27450fb385af0e502413bea.tar.bz2 linux-517bbed90635a17cf27450fb385af0e502413bea.zip | |
mm/vmscan: Convert to hotplug state machine
Install the callbacks via the state machine.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161103145021.28528-8-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 76fda2268148..b8404d32caf0 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -3556,24 +3556,21 @@ unsigned long shrink_all_memory(unsigned long nr_to_reclaim) not required for correctness. So if the last cpu in a node goes away, we get changed to run anywhere: as the first one comes back, restore their cpu bindings. */ -static int cpu_callback(struct notifier_block *nfb, unsigned long action, - void *hcpu) +static int kswapd_cpu_online(unsigned int cpu) { int nid; - if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN) { - for_each_node_state(nid, N_MEMORY) { - pg_data_t *pgdat = NODE_DATA(nid); - const struct cpumask *mask; + for_each_node_state(nid, N_MEMORY) { + pg_data_t *pgdat = NODE_DATA(nid); + const struct cpumask *mask; - mask = cpumask_of_node(pgdat->node_id); + mask = cpumask_of_node(pgdat->node_id); - if (cpumask_any_and(cpu_online_mask, mask) < nr_cpu_ids) - /* One of our CPUs online: restore mask */ - set_cpus_allowed_ptr(pgdat->kswapd, mask); - } + if (cpumask_any_and(cpu_online_mask, mask) < nr_cpu_ids) + /* One of our CPUs online: restore mask */ + set_cpus_allowed_ptr(pgdat->kswapd, mask); } - return NOTIFY_OK; + return 0; } /* @@ -3615,12 +3612,15 @@ void kswapd_stop(int nid) static int __init kswapd_init(void) { - int nid; + int nid, ret; swap_setup(); for_each_node_state(nid, N_MEMORY) kswapd_run(nid); - hotcpu_notifier(cpu_callback, 0); + ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, + "mm/vmscan:online", kswapd_cpu_online, + NULL); + WARN_ON(ret < 0); return 0; } |