On Wed, Feb 13, 2013 at 10:13:06AM -0800, Dan Magenheimer wrote: > Add zcache TODO file > Greg, Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> > --- > drivers/staging/zcache/TODO | 69 +++++++++++++++++++++++++++++++++++++++++++ > 1 files changed, 69 insertions(+), 0 deletions(-) > create mode 100644 drivers/staging/zcache/TODO > > diff --git a/drivers/staging/zcache/TODO b/drivers/staging/zcache/TODO > new file mode 100644 > index 0000000..c1e26d4 > --- /dev/null > +++ b/drivers/staging/zcache/TODO > @@ -0,0 +1,69 @@ > + > +** ZCACHE PLAN FOR PROMOTION FROM STAGING ** > + > +Last updated: Feb 13, 2013 > + > +PLAN STEPS > + > +1. merge zcache and ramster to eliminate horrible code duplication > +2. converge on a predictable, writeback-capable allocator > +3. use debugfs instead of sysfs (per akpm feedback in 2011) > +4. zcache side of cleancache/mm WasActive patch > +5. zcache side of frontswap exclusive gets > +6. zcache must be able to writeback to physical swap disk > + (per Andrea Arcangeli feedback in 2011) > +7. implement adequate policy for writeback > +8. frontswap/cleancache work to allow zcache to be loaded > + as a module > +9. get core mm developer to review > +10. incorporate feedback from review > +11. get review/acks from 1-2 additional mm developers > +12. incorporate any feedback from additional mm reviews > +13. propose location/file-naming in mm tree > +14. repeat 9-13 as necessary until akpm is happy and merges > + > +STATUS/OWNERSHIP > + > +1. DONE as part of "new" zcache; in staging/zcache for 3.9 > +2. DONE as part of "new" zcache (cf zbud.[ch]); in staging/zcache for 3.9 > + (this was the core of the zcache1 vs zcache2 flail) > +3. DONE as part of "new" zcache; in staging/zcache for 3.9 > +4. DONE (w/caveats) as part of "new" zcache; per cleancache performance > + feedback see https://lkml.org/lkml/2011/8/17/351, in > + staging/zcache for 3.9; dependent on proposed mm patch, see > + https://lkml.org/lkml/2012/1/25/300 > +5. DONE as part of "new" zcache; performance tuning only, > + in staging/zcache for 3.9; dependent on frontswap patch > + merged in 3.7 (33c2a174) > +6. DONE (w/caveats), prototyped as part of "new" zcache, had > + bad memory leak; reimplemented to use sjennings clever tricks > + and proposed mm patches with new version in staging/zcache > + for 3.9, see https://lkml.org/lkml/2013/2/6/437; > +7. PROTOTYPED as part of "new" zcache; in staging/zcache for 3.9; > + needs more review (plan to discuss at LSF/MM 2013) > +8. IN PROGRESS; owned by Konrad Wilk; v2 recently posted > + http://lkml.org/lkml/2013/2/1/542 > +9. IN PROGRESS; owned by Konrad Wilk; Mel Gorman provided > + great feedback in August 2012 (unfortunately of "old" > + zcache) > +10. Konrad posted series of fixes (that now need rebasing) > + https://lkml.org/lkml/2013/2/1/566 > +11. NOT DONE; owned by Konrad Wilk > +12. TBD (depends on quantity of feedback) > +13. PROPOSED; one suggestion proposed by Dan; needs more ideas/feedback > +14. TBD (depends on feedback) > + > +WHO NEEDS TO AGREE > + > +Not sure. Seth Jennings is now pursuing a separate but semi-parallel > +track. Akpm clearly has to approve for any mm merge to happen. Minchan > +Kim has interest but may be happy if/when zram is merged into mm. Konrad > +Wilk may be maintainer if akpm decides compression is maintainable > +separately from the rest of mm. (More LSF/MM 2013 discussion.) > + > +ZCACHE FUTURE NEW FUNCTIONALITY > + > +A. Support zsmalloc as an alternative high-density allocator > + (See https://lkml.org/lkml/2013/1/23/511) > +B. Support zero-filled pages more efficiently > +C. Possibly support three zbuds per pageframe when space allows > -- > 1.7.1 > -- 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>