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Commit 5d135373 authored by Olav Haugan's avatar Olav Haugan Committed by Satya Durga Srinivasu Prabhala
Browse files

vmstat: Add cpu isolation awareness 



Ensure vmstat updates do not run on isolated cpus.

Change-Id: Ie16cc9eb73b240459a9a385c39f3176b57d34950
Signed-off-by: default avatarOlav Haugan <ohaugan@codeaurora.org>
[rameezmustafa@codeaurora.org: Port to msm-4.9]
Signed-off-by: default avatarSyed Rameez Mustafa <rameezmustafa@codeaurora.org>
Signed-off-by: default avatarVikram Mulukutla <markivx@codeaurora.org>
Signed-off-by: default avatarSatya Durga Srinivasu Prabhala <satyap@codeaurora.org>
parent c934db56

mm/vmstat.c

+3 −2
Original line number Diff line number Diff line
@@ -1793,7 +1793,7 @@ int vmstat_refresh(struct ctl_table *table, int write, 


static void vmstat_update(struct work_struct *w)

{

	if (refresh_cpu_vm_stats(true)) {

	if (refresh_cpu_vm_stats(true) && !cpu_isolated(smp_processor_id())) {

		/*

		 * Counters were updated so we expect more updates

		 * to occur in the future. Keep on running the
@@ -1884,7 +1884,8 @@ static void vmstat_shepherd(struct work_struct *w) 
	for_each_online_cpu(cpu) {

		struct delayed_work *dw = &per_cpu(vmstat_work, cpu);



		if (!delayed_work_pending(dw) && need_update(cpu))

		if (!delayed_work_pending(dw) && need_update(cpu) &&

		     !cpu_isolated(cpu))

			queue_delayed_work_on(cpu, mm_percpu_wq, dw, 0);

	}

	put_online_cpus();