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alloc_contig_range messages in syslog #25

Closed gpsamu closed 3 years ago

gpsamu commented 3 years ago

Hello. I'm running the following on my Novena:

root@novena-one:/# uname -a Linux novena-one 4.4.0-00156-gc9ba6e8 #12 SMP PREEMPT Fri Feb 19 14:32:59 SGT 2016 armv7l GNU/Linux root@novena-one:/# cat /etc/debian_version 10.7

I'm running X on the system and actively using a variety of apps like Terminal, Firefox, etc. I notice in the syslog repeated instances of the messages:

Jan 11 14:29:18 localhost kernel: [ 5009.361913] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:37:29 localhost kernel: [ 5500.027057] alloc_contig_range: [700fc, 700ff) PFNs busy
Jan 11 14:40:24 localhost kernel: [ 5675.406452] alloc_contig_range: [70af8, 70b00) PFNs busy
Jan 11 14:51:56 localhost kernel: [  141.408503] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:07 localhost kernel: [  152.205937] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:09 localhost kernel: [  154.004943] alloc_contig_range: [700fd, 700fe) PFNs busy
Jan 11 14:52:17 localhost kernel: [  161.765514] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:27 localhost kernel: [  172.325530] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:39 localhost kernel: [  184.140801] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:45 localhost kernel: [  190.101292] alloc_contig_range: [700fd, 700fe) PFNs busy
Jan 11 14:52:48 localhost kernel: [  193.490541] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:54 localhost kernel: [  198.923833] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:54 localhost kernel: [  198.951064] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:07 localhost kernel: [  212.103542] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:14 localhost kernel: [  218.969907] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:20 localhost kernel: [  225.470093] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:30 localhost kernel: [  234.625724] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:32 localhost kernel: [  237.182860] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:37 localhost kernel: [  242.348002] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:41 localhost kernel: [  246.346296] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:54:05 localhost kernel: [  269.545088] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 15:14:44 localhost kernel: [ 1508.846567] alloc_contig_range: [700fc, 70100) PFNs busy

I don't notice any adverse effects however. Just wondering if anybody else is seeing this. I have seen something similar on another imx6 device I had in the past (Udoo quad). IIRC it may have been related to the cma size that was configured.

Jookia commented 3 years ago

I believe this is a harmless bug in early versions of etnaviv before it was mainlined.

On Wed, Jan 13, 2021 at 09:27:04AM -0800, Gábor Samu wrote:

Hello. I'm running the following on my Novena:

root@novena-one:/# uname -a Linux novena-one 4.4.0-00156-gc9ba6e8 #12 SMP PREEMPT Fri Feb 19 14:32:59 SGT 2016 armv7l GNU/Linux root@novena-one:/# cat /etc/debian_version 10.7

I'm running X on the system and actively using a variety of apps like Terminal, Firefox, etc. I notice in the syslog repeated instances of the messages:

Jan 11 14:29:18 localhost kernel: [ 5009.361913] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:37:29 localhost kernel: [ 5500.027057] alloc_contig_range: [700fc, 700ff) PFNs busy
Jan 11 14:40:24 localhost kernel: [ 5675.406452] alloc_contig_range: [70af8, 70b00) PFNs busy
Jan 11 14:51:56 localhost kernel: [  141.408503] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:07 localhost kernel: [  152.205937] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:09 localhost kernel: [  154.004943] alloc_contig_range: [700fd, 700fe) PFNs busy
Jan 11 14:52:17 localhost kernel: [  161.765514] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:27 localhost kernel: [  172.325530] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:39 localhost kernel: [  184.140801] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:45 localhost kernel: [  190.101292] alloc_contig_range: [700fd, 700fe) PFNs busy
Jan 11 14:52:48 localhost kernel: [  193.490541] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:54 localhost kernel: [  198.923833] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:52:54 localhost kernel: [  198.951064] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:07 localhost kernel: [  212.103542] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:14 localhost kernel: [  218.969907] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:20 localhost kernel: [  225.470093] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:30 localhost kernel: [  234.625724] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:32 localhost kernel: [  237.182860] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:37 localhost kernel: [  242.348002] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:53:41 localhost kernel: [  246.346296] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 14:54:05 localhost kernel: [  269.545088] alloc_contig_range: [700fb, 700fc) PFNs busy
Jan 11 15:14:44 localhost kernel: [ 1508.846567] alloc_contig_range: [700fc, 70100) PFNs busy

I don't notice any adverse effects however. Just wondering if anybody else is seeing this. I have seen something similar on another imx6 device I had in the past (Udoo quad). IIRC it may have been related to the cma size that was configured.

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gpsamu commented 3 years ago

Ok then I'll close this one out.