Comment 3 for bug 1828092

disco verification:

ubuntu@d06-4:~$ cat /proc/version
Linux version 5.0.0-16-generic (buildd@bos02-arm64-013) (gcc version 8.3.0 (Ubuntu/Linaro 8.3.0-6ubuntu1)) #17-Ubuntu SMP Wed May 15 10:54:19 UTC 2019
ubuntu@d06-4:~$ dmesg | grep cma
[ 0.000000] cma: Reserved 16 MiB at 0x000000007f000000
[ 0.000000] Memory: 180830576K/184545152K available (11836K kernel code, 1694K rwdata, 5060K rodata, 5504K init, 1158K bss, 3698192K reserved, 16384K cma-reserved)
[ 18.211364] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.217896] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.254209] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.308352] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.328708] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.350072] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.350081] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.350089] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.350097] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 18.350106] cma: cma_alloc: alloc failed, req-size: 33 pages, ret: -12
[ 27.962013] cma_alloc: 358 callbacks suppressed
[ 27.962014] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 27.968453] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 27.974915] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 27.981347] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 27.987779] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 27.994211] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 28.000647] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 28.000649] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 28.013539] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12
[ 28.019974] cma: cma_alloc: alloc failed, req-size: 1 pages, ret: -12