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Alek P
931deb290c
Switch to incremental range tree processing in dnode_sync() to avoid unsafe lock dropping during zfs_range_tree_walk(). This also ensures the free ranges remain visible to dnode_block_freed() throughout the sync process, preventing potential stale data reads. This patch: - Keeps the range tree attached during processing for visibility. - Processes segments one-by-one by restarting from the tree head. - Uses zfs_range_tree_clear() to safely handle ranges that may have been modified while the lock was dropped. - adds ASSERT()s to document that we don't expect dn_free_ranges modification outside of sync context. Reviewed-by: Paul Dagnelie <paul.dagnelie@klarasystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alek Pinchuk <apinchuk@axcient.com> Issue #18186 Closes #18235