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87d93731e7
In case we have I/O and try to remove an L2ARC device a deadlock might occur. arc_read()->zio_read()->zfs_blkptr_verify() waits for SCL_VDEV to be dropped while holding the hash_lock. However, spa_l2cache_load() holds SCL_ALL and waits for the hash_lock in l2arc_evict(). Fix this by moving zfs_blkptr_verify() to the top top arc_read() before the hash_lock is taken. Verify the block pointer and return a checksum error if damaged rather than halting the system, by using BLK_VERIFY_LOG instead of BLK_VERIFY_HALT. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Mark Maybee <mark.maybee@delphix.com> Signed-off-by: George Amanakis <gamanakis@gmail.com> Closes #12054 |
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