Am 11.01.21 um 10:03 schrieb Christian König:
Hi Mikhail
Am 10.01.21 um 23:26 schrieb Mikhail Gavrilov:
Hi folks,
today I joined to testing Kernel 5.11 and saw that the kernel log was
flooded with BUG messages:
BUG: sleeping function called from invalid context at mm/vmalloc.c:1756
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 266, name:
kswapd0
INFO: lockdep is turned off.
CPU: 15 PID: 266 Comm: kswapd0 Tainted: G W ---------
--- 5.11.0-0.rc2.20210108gitf5e6c330254a.119.fc34.x86_64 #1
Hardware name: System manufacturer System Product Name/ROG STRIX
X570-I GAMING, BIOS 2802 10/21/2020
Call Trace:
dump_stack+0x8b/0xb0
___might_sleep.cold+0xb6/0xc6
vm_unmap_aliases+0x21/0x40
change_page_attr_set_clr+0x9e/0x190
set_memory_wb+0x2f/0x80
ttm_pool_free_page+0x28/0x90 [ttm]
ttm_pool_shrink+0x45/0xb0 [ttm]
ttm_pool_shrinker_scan+0xa/0x20 [ttm]
do_shrink_slab+0x177/0x3a0
shrink_slab+0x9c/0x290
shrink_node+0x2e6/0x700
balance_pgdat+0x2f5/0x650
kswapd+0x21d/0x4d0
? do_wait_intr_irq+0xd0/0xd0
? balance_pgdat+0x650/0x650
kthread+0x13a/0x150
? __kthread_bind_mask+0x60/0x60
ret_from_fork+0x22/0x30
I'm probably responsible for this. Need to double check why we try to
allocate memory while freeing some.
Changing the page table attributes while releasing memory might sleep.
So we can't use a spinlock here.
Thanks for the report, a patch to fix this is on the mailing list now.
But the most unpleasant thing is that after a while the monitor turns
off and does not go on again until the restart.
This is accompanied by an entry in the kernel log:
amdgpu 0000:0b:00.0: amdgpu: 00000000ff7d8b94 pin failed
[drm:dm_plane_helper_prepare_fb [amdgpu]] *ERROR* Failed to pin
framebuffer with error -12
-12 is just -ENOMEM. Looks like a memory leak to me, maybe caused by
the problem above, maybe something completely unrelated.
I will take a look.
The looks like a completely unrelated memory leak to me.
Probably best if you open up a bug report for this.
Thanks,
Christian.
Thanks,
Christian.
$ grep "Failed to pin framebuffer with error" -Rn .
./drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c:5816:
DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
$ git blame -L 5811,5821
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
Blaming lines: 0% (11/9167), done.
5d43be0ccbc2f (Christian König 2017-10-26 18:06:23 +0200 5811)
domain = AMDGPU_GEM_DOMAIN_VRAM;
e7b07ceef2a65 (Harry Wentland 2017-08-10 13:29:07 -0400 5812)
7b7c6c81b3a37 (Junwei Zhang 2018-06-25 12:51:14 +0800 5813) r =
amdgpu_bo_pin(rbo, domain);
e7b07ceef2a65 (Harry Wentland 2017-08-10 13:29:07 -0400 5814) if
(unlikely(r != 0)) {
30b7c6147d18d (Harry Wentland 2017-10-26 15:35:14 -0400 5815)
if (r != -ERESTARTSYS)
30b7c6147d18d (Harry Wentland 2017-10-26 15:35:14 -0400 5816)
DRM_ERROR("Failed to pin framebuffer with error %d\n", r);
0f257b09531b4 (Chunming Zhou 2019-05-07 19:45:31 +0800 5817)
ttm_eu_backoff_reservation(&ticket, &list);
e7b07ceef2a65 (Harry Wentland 2017-08-10 13:29:07 -0400 5818)
return r;
e7b07ceef2a65 (Harry Wentland 2017-08-10 13:29:07 -0400 5819) }
e7b07ceef2a65 (Harry Wentland 2017-08-10 13:29:07 -0400 5820)
bb812f1ea87dd (Junwei Zhang 2018-06-25 13:32:24 +0800 5821) r =
amdgpu_ttm_alloc_gart(&rbo->tbo);
Who knows how to fix it?
Full kernel logs is here:
[1]
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpastebin.com%2FfLasjDHX&data=04%7C01%7Cchristian.koenig%40amd.com%7C15ef83e462e049429be208d8b5b6c6bb%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637459143942981908%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=Uj9Ob3lUCAsH8NrxC715zSfl5Yqc44ySVo%2FZkdyTpCM%3D&reserved=0
[2]
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpastebin.com%2Fg3wR2r9e&data=04%7C01%7Cchristian.koenig%40amd.com%7C15ef83e462e049429be208d8b5b6c6bb%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637459143942981908%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=u8irMU3i8c37W5SkyiaAi%2FtwMoPorezm3NI1EYI3csE%3D&reserved=0
--
Best Regards,
Mike Gavrilov.
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