On 05.01.22 07:08, Juergen Gross wrote: > On 04.01.22 15:31, David Hildenbrand wrote: >> On 24.12.21 07:22, Christoph Hellwig wrote: >>> Hi all, >>> >>> since the remove of the Xen tmem driver in 2019, the cleancache hooks are >>> entirely unused, as are large parts of frontswap. This series against >>> linux-next (with the folio changes included) removes cleancaches, and cuts >>> down frontswap to the bits actually used by zswap. >>> >> >> Just out of curiosity, why was tmem removed from Linux (or even Xen?). >> Do you have any information? > > tmem never made it past the "experimental" state in the Xen hypervisor. > Its implementation had some significant security flaws, there was no > maintainer left, and nobody stepped up to address those issues. > > As a result tmem was removed from Xen. Interesting, thanks for sharing. I know tmem mostly from the papers and thought it was an interesting approach in general. There was even papers about a virtio implementation, however, actual code never appeared in the wild :) -- Thanks, David / dhildenb
