https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287897
Bug ID: 287897
Summary: freebsd-update is extremally slow due install -S. Do
we need this option on ZFS? (+possible fix)
Product: Base System
Version: 14.2-STABLE
Hardware: Any
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: bin
Assignee: [email protected]
Reporter: [email protected]
Created attachment 261730
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=261730&action=edit
the patch to freebsd-update
Do we really need install -S on ZFS?
The install_from_index() calls
install -S ...
for every file. It's extremally slow when the update includes /usr/src (when we
upgrade a system).
IMHO, if we have ZFS on root, the -S option is redoundant because install
utility copies new version to a temporary file first and then switches new->old
file atomically. If a system crashed during install, zfs will roll back to some
intermediate state, with some files completely installed and others left intact
+ zero or one temporary file half-copied.
The patch disabling -S option when we see than the root uses ZFS attached.
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