Paul Mackerras <paulus@xxxxxxxxx> wrote:The notification is in the form of an unalignment trap resulting in a panic, is that firm enough? :-)
Olof has made a patch that uses atomics for these on ppc64 rather than
locking and unlocking a lock, but it will only work correctly if the
bitmap is always 8-byte aligned.
Sounds sane, as long as you get firmly notified when a poorly-aligned
address is fed in.