Note that in current disco things have gotten worse - our single page
allocations have blown up to 11753:
$ cat cma.disco.dmesg | grep "cma: cma_alloc(cma" | sed -r 's/.*count
([0-9]+)\,.*/\1/' | sort -n | uniq -c
11753 1
3 2
3 4
234 8
32 16
2 24
4 32
256 33
39 64
2 128
2 1024
I bisected this down to a backport of the following commit:
3e394f9413ec RDMA/hns: Modify qp&cq&pd specification according to UM
Reverting that gets us down to 3029 single page allocations, freeing up
about 34M.
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https://bugs.launchpad.net/bugs/1823753
Title:
arm64: cma_alloc errors at boot
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