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A trivial Linux kernel module to execute WBINVD on demand (cat /proc/wbinvd)

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WBINVD (Write Back and INValidate Cache) is a (ring 0 only) x86 instruction to asynchronously purge the cache (with write-back, so it is safe to execute)

more info about WBINVD: http://www.felixcloutier.com/x86/WBINVD.html

make && make test

one can use dkms to create a .deb, for instance:

make install-bdep
apt-get install dkms
cp -a <repo_dir> /usr/src/wbinvd-1.0
rm -rf /usr/src/wbinvd-1.0/.git
dkms add wbinvd/1.0
make deb # or dkms mkdeb wbinvd/1.0 --source-only