On Tue, Jun 07, 2016 at 03:51:15PM -0300, Daniel Bristot de Oliveira wrote: > While testing the deadline scheduler + cgroup setup I hit this > warning. > > [ 132.612935] ------------[ cut here ]------------ > [ 132.612951] WARNING: CPU: 5 PID: 0 at kernel/softirq.c:150 __local_bh_enable_ip+0x6b/0x80 > [ 132.612952] Modules linked in: (a ton of modules...) > [ 132.612981] CPU: 5 PID: 0 Comm: swapper/5 Not tainted 4.7.0-rc2 #2 > [ 132.612981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.2-20150714_191134- 04/01/2014 > [ 132.612982] 0000000000000086 45c8bb5effdd088b ffff88013fd43da0 ffffffff813d229e > [ 132.612984] 0000000000000000 0000000000000000 ffff88013fd43de0 ffffffff810a652b > [ 132.612985] 00000096811387b5 0000000000000200 ffff8800bab29d80 ffff880034c54c00 > [ 132.612986] Call Trace: > [ 132.612987] <IRQ> [<ffffffff813d229e>] dump_stack+0x63/0x85 > [ 132.612994] [<ffffffff810a652b>] __warn+0xcb/0xf0 > [ 132.612997] [<ffffffff810e76a0>] ? push_dl_task.part.32+0x170/0x170 > [ 132.612999] [<ffffffff810a665d>] warn_slowpath_null+0x1d/0x20 > [ 132.613000] [<ffffffff810aba5b>] __local_bh_enable_ip+0x6b/0x80 > [ 132.613008] [<ffffffff817d6c8a>] _raw_write_unlock_bh+0x1a/0x20 > [ 132.613010] [<ffffffff817d6c9e>] _raw_spin_unlock_bh+0xe/0x10 > [ 132.613015] [<ffffffff811388ac>] put_css_set+0x5c/0x60 > [ 132.613016] [<ffffffff8113dc7f>] cgroup_free+0x7f/0xa0 > [ 132.613017] [<ffffffff810a3912>] __put_task_struct+0x42/0x140 > [ 132.613018] [<ffffffff810e776a>] dl_task_timer+0xca/0x250 > [ 132.613027] [<ffffffff810e76a0>] ? push_dl_task.part.32+0x170/0x170 > [ 132.613030] [<ffffffff8111371e>] __hrtimer_run_queues+0xee/0x270 > [ 132.613031] [<ffffffff81113ec8>] hrtimer_interrupt+0xa8/0x190 > [ 132.613034] [<ffffffff81051a58>] local_apic_timer_interrupt+0x38/0x60 > [ 132.613035] [<ffffffff817d9b0d>] smp_apic_timer_interrupt+0x3d/0x50 > [ 132.613037] [<ffffffff817d7c5c>] apic_timer_interrupt+0x8c/0xa0 Is this something in mainline? This forces all task free path to be irq-safe, which *could* be fine but it's weird to make cgroup free path irq-safe for something which isn't in mainline. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
