[Bug 233245] [UFS] Softupdates fails to track dependency between appended data and i_size

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233245

Konstantin Belousov <kib at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib at FreeBSD.org

--- Comment #3 from Konstantin Belousov <kib at FreeBSD.org> ---
Of course I sympathize the idea of improving the user experience, but IMO the
cost of the code complexity is more important there.

SU, from my prospective, were never supposed to provide the user data
consistency guarantees. The goal was/is only the metadata sanity, even not the
guarantee that on-disk metadata actually matches some state during the system
operation.  We never track user data block writes ordering, so whatever state
user data is left after the crash, is the user issue.

>From this PoV, file size increase by hole vs. increase by the actual content is
not under the SU scope.  Again, to make my opinion clear: I would not object,
but SU are already insanely complex and we must not increase the complexity
just because we can.

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