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Alexander Motin
ea37c30fcb
Spacemap entry might be too big to fit into a block pointer ashift. We hit an assertion trying to run `zdb -bvy` on a large pool. But it seems the code does not really need size there, since we only need to search for a range of offsets, so setting it to zero should just make btree return position just before the first entry. I suspect the previous code could actually miss the first entry due to this if its size was smaller. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Igor Kozhukhov <igor@dilos.org> Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com> Closes #17764