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re: hangs with awge(4) on pine64 rock64 board

> It looks like something I fixed some time ago in the arm pmap:
> http://mail-index.netbsd.org/source-changes/2019/04/23/msg105355.html
> maybe arm64 has a similar issue.


unfortunately, arm64 pmap already uses a IPL_VM lock for
the kernel pmap, only allocates via uvm_pglistalloc(),
and avoids the kernel lock entirely, so i think this is
a different problem.


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