JackOfAll wrote: > squeezelite 100% CPU. Related to using the audio clock for spdif out? > > > Code: -------------------- > > > [44755.805477] BUG: scheduling while atomic: squeezelite/2725/0x00000003 > [44755.882662] Modules linked in: rfcomm bnep hci_uart bluetooth brcmfmac brcmutil cfg80211 snd_usb_audio rfkill snd_hwdep snd_usbmidi_lib snd_rawmidi snd_seq_device uinput > [44756.063911] Backtrace: > [44756.093110] [<8004aa1c>] (dump_backtrace+0x0/0x108) from [<80536cc0>] (dump_stack+0x18/0x1c) > [44756.194258] r6:b6b60000 r5:81aca1c0 r4:00000000 r3:60000093 > [44756.261976] [<80536ca8>] (dump_stack+0x0/0x1c) from [<805372d0>] (__schedule_bug+0x64/0x74) > [44756.362088] [<8053726c>] (__schedule_bug+0x0/0x74) from [<8053cda8>] (__schedule+0x7c/0x6c4) > [44756.463236] r4:90809260 r3:00000000 > [44756.505950] [<8053cd2c>] (__schedule+0x0/0x6c4) from [<8053d57c>] (schedule+0x80/0x84) > [44756.600855] [<8053d4fc>] (schedule+0x0/0x84) from [<8053e600>] (__mutex_lock_slowpath+0x180/0x1f0) > [44756.708256] [<8053e480>] (__mutex_lock_slowpath+0x0/0x1f0) from [<8053e698>] (mutex_lock+0x28/0x40) > [44756.816691] r8:bf855200 r7:0000000e r6:806e2b54 r5:2ee00000 r4:806e6ac0 > [44756.896910] [<8053e670>] (mutex_lock+0x0/0x40) from [<8006435c>] (clk_set_rate+0x3c/0x6c) > [44756.994928] r4:806e2c44 r3:8005a6e8 > [44757.037644] [<80064320>] (clk_set_rate+0x0/0x6c) from [<80064254>] (wand_set_spdif_clk_rate+0x5c/0xa0) > [44757.149204] r5:00000010 r4:02ee0000 > [44757.191923] [<800641f8>] (wand_set_spdif_clk_rate+0x0/0xa0) from [<80436050>] (mxc_spdif_trigger+0x1d0/0x5f0) > [44757.310773] r7:0000000e r6:00000001 r5:00000004 r4:0002ee00 > [44757.378491] [<80435e80>] (mxc_spdif_trigger+0x0/0x5f0) from [<8042a758>] (soc_pcm_trigger+0x50/0xf0) > [44757.487968] r8:bf8536c0 r7:bf84c2a0 r6:00000001 r5:bf885400 r4:bf855200 > [44757.566092] r3:80435e80 > [44757.597355] [<8042a708>] (soc_pcm_trigger+0x0/0xf0) from [<80422400>] (snd_pcm_do_start+0x2c/0x38) > [44757.704751] r8:806ffe68 r7:00000000 r6:00000003 r5:806ffe68 r4:bf855200 > [44757.782876] r3:8042a708 > [44757.814136] [<804223d4>] (snd_pcm_do_start+0x0/0x38) from [<80422124>] (snd_pcm_action_single+0x40/0x6c) > [44757.927787] [<804220e4>] (snd_pcm_action_single+0x0/0x6c) from [<80422350>] (snd_pcm_action_lock_irq+0x7c/0x9c) > [44758.048722] r7:00000003 r6:bf85528c r5:bf85528c r4:bf855200 > [44758.116443] [<804222d4>] (snd_pcm_action_lock_irq+0x0/0x9c) from [<80423640>] (snd_pcm_common_ioctl1+0x7d4/0xf70) > [44758.239466] r8:2cb00c58 r7:ba52b320 r6:2cb00c58 r5:bf855200 r4:2cb00c58 > [44758.317589] r3:00004142 > [44758.348849] [<80422e6c>] (snd_pcm_common_ioctl1+0x0/0xf70) from [<80424614>] (snd_pcm_playback_ioctl1+0x3c0/0x434) > [44758.472919] [<80424254>] (snd_pcm_playback_ioctl1+0x0/0x434) from [<804246b8>] (snd_pcm_playback_ioctl+0x30/0x3c) > [44758.595936] r8:bf87cc10 r7:00004142 r6:2cb00c58 r5:ba52b320 r4:00000000 > [44758.676161] [<80424688>] (snd_pcm_playback_ioctl+0x0/0x3c) from [<8010c0b4>] (vfs_ioctl+0x28/0x44) > [44758.783563] [<8010c08c>] (vfs_ioctl+0x0/0x44) from [<8010cbd8>] (do_vfs_ioctl+0x4cc/0x520) > [44758.882632] [<8010c70c>] (do_vfs_ioctl+0x0/0x520) from [<8010cc80>] (sys_ioctl+0x54/0x80) > [44758.980659] [<8010cc2c>] (sys_ioctl+0x0/0x80) from [<80047220>] (ret_fast_syscall+0x0/0x30) > [44759.080762] r8:800473a4 r7:00000036 r6:000247cc r5:42cb5000 r4:2cb00af0 > -------------------- > >
Have you seen this more than once??? I think the cause of the error message is the fact that arch/arm/plat-mxc/clock.c uses a mutex to protect the clock state in clk_set_rate, but if look at implementations for clk_set_rate for other architectures it is a spinlock. If we want to be able to alter the underlying clock rate at the time of changing the spdif clock then I think we need to be able to do it from within wand_set_spdif_clk_rate. However this message is a warning which should not prevent scheduling when the mutex is freed? So if this is causing 100% cpu then there is something more significant happening? What were the circumstances? ------------------------------------------------------------------------ Triode's Profile: http://forums.slimdevices.com/member.php?userid=17 View this thread: http://forums.slimdevices.com/showthread.php?t=98544 _______________________________________________ unix mailing list unix@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/unix
