Hi Dan, On Wed, Feb 13, 2013 at 10:13:06AM -0800, Dan Magenheimer wrote: >Add zcache TODO file > >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 ** >+ Great plan! :) >+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 I'm interested in and will try it if no guys focus on it. Regards, Wanpeng Li >+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> _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
