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going to re-read inodes. Secondary write initiators, e.g. ufs_inactive(), might need to start a write while owning the vnode lock. Since the suspended state established by /dev/ufssuspend prevents them from entering vn_start_secondary_write(), we get deadlock otherwise. Note that it is arguably not very useful to re-read inodes after /dev/ufssuspend suspension, because the suspension does not block readers, and other threads might read existing files in parallel with suspension owner (for now, only growfs(8)) operations. This effectively means that suspension owner cannot safely modify existing inodes, and then there is no sense in re-reading. But keep the code enabled for now. Reported and tested by: pho Reviewed by: mckusick Sponsored by: The FreeBSD Foundation MFC after: 2 weeks
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