Messages in this thread Patch in this message | | | Date | Mon, 14 Dec 2015 12:32:23 -0600 (CST) | From | Christoph Lameter <> | Subject | Re: vmstat: make vmstat_updater deferrable again and shut down on idle |
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Hmmm... We got a race condition since quiet_vmstat touches cpu_stat_off which may not be allocated early in the bootup sequence. Causes oopses on boot.
Subject: vmstat: quieting vmstat requires a running system
Do not do anything unless the system is actually running. Otherwise we may crash on bootup.
Signed-off-by: Christoph Lameter <cl@linux.com>
Index: linux/mm/vmstat.c =================================================================== --- linux.orig/mm/vmstat.c +++ linux/mm/vmstat.c @@ -1270,6 +1270,9 @@ static void vmstat_update(struct work_st */ void quiet_vmstat(void) { + if (system_state != SYSTEM_RUNNING) + return; + do { if (!cpumask_test_and_set_cpu(smp_processor_id(), cpu_stat_off)) cancel_delayed_work(this_cpu_ptr(&vmstat_work));
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