[l-a-u CCed because we've been talking about this problem there recently, and that's what prodded me to do the bisection to track it down... fortunately the -rt8 to -rt9 interdiff was pretty small!] Subject: [PATCH] [RT] tasklets: fix typo in tasklet_hi_action Fix a typo in tasklet_hi_action -- using the wrong tasklet list when removing actions. This appears to be what was causing the ALSA sequencer device not to work in 2.6.26 with the RT patch: the sequencer was flaky in -rt1 to -rt8, and just hung in -rt9 and later, after tasklets-fix-tasklet_hi_schedule.patch which fixed the same typo when adding to the list. I guess that's because before -rt9 the actions were going onto the wrong list, whereas after -rt9 they were being lost entirely once the first one had been performed. It seems happy now, anyway. Signed-off-by: Adam Sampson <ats@xxxxxxxxx> --- linux-2.6.26/kernel/softirq.c_orig 2009-01-04 14:41:06.000000000 +0000 +++ linux-2.6.26/kernel/softirq.c 2009-01-04 14:41:49.000000000 +0000 @@ -657,7 +657,7 @@ local_irq_disable(); list = __get_cpu_var(tasklet_hi_vec).head; __get_cpu_var(tasklet_hi_vec).head = NULL; - __get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_vec).head; + __get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_hi_vec).head; local_irq_enable(); __tasklet_action(a, list); -- Adam Sampson <ats@xxxxxxxxx> <http://offog.org/> -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
