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When rolling back a mounted filesystem zfs_suspend() is called which acquires the z_teardown_inactive_lock. This lock can not be dropped until the filesystem has been rolled back and resumed in zfs_resume_fs(). Therefore, we must not call iput() under this lock because it may result in the inode->evict() handler being called which also takes this lock. Instead use zfs_iput_async() to ensure dropping the last reference is deferred and runs in a safe context. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #2670 |
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