Hello Andrey,
On Sun, Oct 16, 2016 at 11:52:19PM +0200, Philipp Matthias Hahn wrote:
> On Mon, Sep 19, 2016 at 07:08:52AM +0200, Philipp Hahn wrote:
> > Am 16.09.2016 um 12:00 schrieb Andrey Utkin:
> > > Please try this patch. It is purely speculative as I don't have the
> > > hardware,
> > > but I hope my approach is right.
> >
> > Thanks you for the patch; I've built a new kernel but didn't have the
> > time to test it yet; I'll mail you again as soon as I have tested it.
>
> I tested your patch and during my limites testing I wan't able to
> reproduce the previous problem. Seems you fixed it.
>
> Tested-by: Philipp Matthias Hahn
>
> Thanks you again for looking into that issues.
Bad news: I'm running linux-4.15.2 by now and again got a stuck ffmpeg
process after accessing /dev/video0:
| INFO: task read_thread:20579 blocked for more than 120 seconds.
| Tainted: P O 4.15.2 #1
| "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
| read_thread D0 20579 2949 0x8000
| Call Trace:
| ? __schedule+0x646/0x697
| schedule+0x79/0x94
| videobuf_waiton+0x11c/0x148 [videobuf_core]
| ? wait_woken+0x68/0x68
| saa7146_dma_free+0x34/0x55 [saa7146_vv]
| buffer_release+0x25/0x33 [saa7146_vv]
| videobuf_vm_close+0xd6/0x103 [videobuf_dma_sg]
| remove_vma+0x23/0x49
| exit_mmap+0xea/0x114
| mmput+0x45/0xdb
| do_exit+0x3a0/0x8c1
| do_group_exit+0x95/0x95
| get_signal+0x41c/0x447
| do_signal+0x1e/0x4c2
| ? __schedule+0x646/0x697
| ? do_task_dead+0x38/0x3a
| ? SyS_futex+0x127/0x137
| exit_to_usermode_loop+0x1f/0x69
| do_syscall_64+0xe3/0xea
| entry_SYSCALL_64_after_hwframe+0x21/0x86
| RIP: 0033:0x7f56429927fd
| RSP: 002b:7f56217b3550 EFLAGS: 0246 ORIG_RAX: 00ca
| RAX: fe00 RBX: 7f5608002320 RCX: 7f56429927fd
| RDX: RSI: 0080 RDI: 7f560800234c
| RBP: R08: R09: 7f5608002320
| R10: R11: 0246 R12: 0003
| R13: 7f56080022f8 R14: R15: 7f560800234c
Your previous patch is applied since v4.10-rc1~71^2^2~34 , so the issue seems
to be not fixed.
The tainting is from the NVidia driver.
Philipp
