Comment 28 for bug 1933301

This error message[1] is suggested in comment#27 to have a further investigation.

[1]
[ 27.376743] cma: cma_alloc: alloc failed, req-size: 4 pages, ret: -12
[ 27.415382] cma: cma_alloc: alloc failed, req-size: 4 pages, ret: -12
[ 27.416089] cma: cma_alloc: alloc failed, req-size: 4 pages, ret: -12