On Fri, 4 Oct 2013, Sebastian Andrzej Siewior wrote: > * Thomas Pfaff | 2013-09-19 11:02:57 [+0200]: > > >If an irq is requested during device open, for example by opening a serial > >device, then request_irq is called in the context of the opening process. > >If the process lacks off CAP_SYS_NICE the irq thread is running with SCHED_OTHER > >priority. > > > >The problem exists in other real time patches as well, 3.10 seems to be ok. > > Hmmm. I see the same check in v3.10 compared to v3.6 which so I *think* > v3.10 has the same problem. > However this does not look to be -RT specific, you should see the same > problem in mainline, too. Could you please verify whether this does > affect v3.10? And if it does, we should try to fix up it upstream, too > I did a quick check with 3.10.14-rt9 and it is not affected, because sched_setscheduler is called in the context of the irq thread as the mainline kernel does, but the 3.6 rt patch moved this into __setup_irq. Thomas -- 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
