On Mon, Jun 02, 2014 at 06:19:40PM -0400, Dan Streetman wrote: > In order to allow zswap users to choose between zbud and zsmalloc for > the compressed storage pool, this patch set adds a new api "zpool" that > provides an interface to both zbud and zsmalloc. Only minor changes > to zbud's interface were needed. This does not include implementing > shrinking in zsmalloc, which will be sent separately. > > I believe Seth originally was using zsmalloc for swap, but there were > concerns about how significant the impact of shrinking zsmalloc would > be when zswap had to start reclaiming pages. That still may be an > issue, but this at least allows users to choose themselves whether > they want a lower-density or higher-density compressed storage medium. > At least for situations where zswap reclaim is never or rarely reached, > it probably makes sense to use the higher density of zsmalloc. > > Note this patch set does not change zram to use zpool, although that > change should be possible as well. This looks good! Much better than when we first started :) Thanks Dan. I haven't had a chance to test it out yet so I'm going to wait to Ack it until then, which might be as late as 6/16 due to a vacation and a conference. Thanks, Seth > > --- > > Changes since v3 : https://lkml.org/lkml/2014/5/24/130 > -In zpool_shrink() use # pages instead of # bytes > -Add reclaimed param to zpool_shrink() to indicate to caller > # pages actually reclaimed > -move module usage counting to zpool, from zbud/zsmalloc > -update zbud_zpool_shrink() to call zbud_reclaim_page() in a > loop until requested # pages have been reclaimed (or error) > > Changes since v2 : https://lkml.org/lkml/2014/5/7/927 > -Change zpool to use driver registration instead of hardcoding > implementations > -Add module use counting in zbud/zsmalloc > > Changes since v1 https://lkml.org/lkml/2014/4/19/97 > -remove zsmalloc shrinking > -change zbud size param type from unsigned int to size_t > -remove zpool fallback creation > -zswap manually falls back to zbud if specified type fails > > > Dan Streetman (6): > mm/zbud: zbud_alloc() minor param change > mm/zbud: change zbud_alloc size type to size_t > mm/zpool: implement common zpool api to zbud/zsmalloc > mm/zpool: zbud/zsmalloc implement zpool > mm/zpool: update zswap to use zpool > mm/zpool: prevent zbud/zsmalloc from unloading when used > > include/linux/zbud.h | 2 +- > include/linux/zpool.h | 224 ++++++++++++++++++++++++++++++++++++++++++++++++++ > mm/Kconfig | 43 ++++++---- > mm/Makefile | 1 + > mm/zbud.c | 123 +++++++++++++++++++++++---- > mm/zpool.c | 206 ++++++++++++++++++++++++++++++++++++++++++++++ > mm/zsmalloc.c | 83 +++++++++++++++++++ > mm/zswap.c | 76 ++++++++++------- > 8 files changed, 694 insertions(+), 64 deletions(-) > create mode 100644 include/linux/zpool.h > create mode 100644 mm/zpool.c > > -- > 1.8.3.1 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>