Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Wed, 19 Apr 2017 09:16:42 +0200 | Subject | Re: Re: "mm: move pcp and lru-pcp draining into single wq" broke resume from s2ram |
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Hi Tetsuo,
On Wed, Apr 19, 2017 at 7:41 AM, Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> wrote: > Geert Uytterhoeven wrote: >> 8 locks held by s2ram/1899: >> #0: (sb_writers#7){.+.+.+}, at: [<ffffff80081ca1a4>] vfs_write+0xa8/0x15c >> #1: (&of->mutex){+.+.+.}, at: [<ffffff8008245964>] kernfs_fop_write+0xf0/0x194 >> #2: (s_active#48){.+.+.+}, at: [<ffffff800824596c>] kernfs_fop_write+0xf8/0x194 >> #3: (pm_mutex){+.+.+.}, at: [<ffffff80081059a4>] pm_suspend+0x16c/0xabc >> #4: (&dev->mutex){......}, at: [<ffffff80083d4920>] device_resume+0x58/0x190 >> #5: (cma_mutex){+.+...}, at: [<ffffff80081c516c>] cma_alloc+0x150/0x374 >> #6: (lock){+.+...}, at: [<ffffff800818b8ec>] lru_add_drain_all+0x4c/0x1b4 >> #7: (cpu_hotplug.dep_map){++++++}, at: [<ffffff80080ab8f4>] get_online_cpus+0x3c/0x9c > > I think this situation suggests that
[...]
> Somebody is waiting forever with cpu_hotplug.lock held? > I think that full dmesg with SysRq-t output is appreciated.
As SysRq doesn't work with my serial console, I added calls to show_state() and show_workqueue_state() to check_hung_task().
Result with current linus/master attached.
Thanks!
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds [unhandled content-type:application/x-gzip] | |