fdc6b10d44
vn_open_cred() assumes that it is called from the top-level of a VFS syscall. Writers must call bwillwrite() before locking any VFS resource to wait for cleanup of dirty buffers. ZFS getextattr() and setextattr() VOPs do call vn_open_cred(), which results in wait for unrelated buffers while owning ZFS vnode lock (and ZFS does not use buffer cache). VN_OPEN_INVFS allows caller to skip bwillwrite. Note that ZFS is still incorrect there, because it starts write on an mp and locks a vnode while holding another vnode lock. Reported by: Willem Jan Withagen <wjw@digiware.nl> Sponsored by: The FreeBSD Foundation MFC after: 1 week |
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| compat/opensolaris | ||
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| dev | ||