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We need the ability to re-enable patch modules which rely on KPATCH_FORCE_UNSAFE, so that kpatch unload and load will always work with them.

This has already been fixed upstream with https://github.com/dynup/kpatch/pull/398.

Linqing,

See previous comment for recreator patch.

Before:

# kpatch load kpatch-patch.ko 
loading core module: /root/kpatch/kpatch/../kmod/core/kpatch.ko
loading patch module: kpatch-patch.ko
# kpatch unload kpatch-patch.ko 
disabling patch module: kpatch_patch
unloading patch module: kpatch_patch
# kpatch load kpatch-patch.ko 
loading patch module: kpatch-patch.ko
insmod: ERROR: could not insert module kpatch-patch.ko: File exists
kpatch: failed to load module kpatch-patch.ko

After:

# kpatch load kpatch-patch.ko 
loading core module: /root/kpatch/kpatch/../kmod/core/kpatch.ko
loading patch module: kpatch-patch.ko
# kpatch unload kpatch-patch.ko 
disabling patch module: kpatch_patch
unloading patch module: kpatch_patch
# kpatch load kpatch-patch.ko 
module already loaded, re-enabling

(In reply to Seth Jennings from comment #4)
> Linqing,
> 
> See previous comment for recreator patch.
> 

Thank you Seth!

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-0296.html