-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/03/2012 03:50 AM, John Moser wrote: > I'm pretty sure zram will be superceded by zcache on freeswap. > zcache is a tmem backend, freeswap and CleanCache are freemem > frontends. Any backend can be used on any frontend, so when (if) the > freeswap frontend goes into mainline zcache will load onto that. > zcache is zram, it uses zram's xvmalloc when running on freeswap > (uses a different allocator on page cache) and everything, it's even > written by the same guy. zcache is just zram ported to tmem, which > makes it both the same and separate--it is zram, but it's not zram. > As tmem looks like the way the kernel is moving in the future, zram > will probably go away--the appropriate compressed in-memory file > system is tmpfs with zswap, as RAM used to back tmpfs can be swapped > and thus zcache and zram will both act to compress tmpfs, so zram's > usefulness as a block device in RAM that can house a compressed file > system is limited.
I think you are still using the older terminology. The part that can handle dirty pages ( swap ) is now called Frontswap, and it has run into some difficulty recently getting merged into the mainline kernel. Once it gets merged, CleanCache/FrontSwap with the zcache backend ( on bare metal, tmem backend when running on xen ) should fulfill this role quite nicely and should be a good candidate to enable by default. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPVXOFAAoJEJrBOlT6nu75ItUIAJrFyzhRUW73dMG8WBlSy7Sn Cx+7qgKDfyhzk8wJuv5V4lrw9fQGPitwp2j+apIAAh0Xh2XSIdXSBnup+7mFr8j6 WmSEH82hiXKxLGH/WL7Ea9RN7KH2vlTkH0FC780XFf+PsMMR+CMySDSHfeoNjgI+ 0FdcrGgwmVYBjUzBTkIBf0/Zq9eVjxc2kB7i1x7BBw/o0P1LnbtWCMkq1aSDoQuK oG3lQZvROm6WQxNGAfJoU1QlMjKpMgDnPCKWtkiNkBnlbF/obPa0Dy1M8Sh6ozUs p2ksYo6tDWZcZcvYCh1mhGJ2D56c5POVplxQ1ripRbTzNH9+wbrgv0yNdU+bj2Y= =/Xta -----END PGP SIGNATURE----- -- Ubuntu-devel-discuss mailing list Ubuntu-devel-discuss@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss
