I noticed this change between 3.14.3-rt5 and 3.14.10-rt7: --- debian/patches/features/all/rt/random-make-it-work-on-rt.patch (revision 21522) +++ debian/patches/features/all/rt/random-make-it-work-on-rt.patch (working copy) [...] ---- a/kernel/irq/manage.c -+++ b/kernel/irq/manage.c -@@ -942,6 +942,12 @@ static int irq_thread(void *data) - if (action_ret == IRQ_HANDLED) - atomic_inc(&desc->threads_handled); - -+#ifdef CONFIG_PREEMPT_RT_FULL -+ migrate_disable(); -+ add_interrupt_randomness(action->irq, 0, -+ desc->random_ip ^ (unsigned long) action); -+ migrate_enable(); -+#endif - wake_threads_waitq(desc); - } -
(I.e. old patch included these additions, new patch doesn't.) Evidently this was made in the announced 3.14.10-rt6, not -rt7. Was it intentional? Now irq_desc::random_ip is set but never used. Ben. -- Ben Hutchings To err is human; to really foul things up requires a computer.
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