From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
This submission is just intended to get more review if possible.
This patchset is already on mmotm for a month and there is
no problem at all. No changes from mmotm one.
Changes from v1:
o Fold fixes into corresponding ones (no difference from mmotm)
o Add a clean-up patch at last per Christoph's comment
Hello,
This patchset implements new freed object management way, that is,
OBJFREELIST_SLAB. Purpose of it is to reduce memory overhead in SLAB.
SLAB needs a array to manage freed objects in a slab. If there is
leftover after objects are packed into a slab, we can use it as
a management array, and, in this case, there is no memory waste.
But, in the other cases, we need to allocate extra memory for
a management array or utilize dedicated internal memory in a slab for it.
Both cases causes memory waste so it's not good.
With this patchset, freed object itself can be used for a management
array. So, memory waste could be reduced. Detailed idea and numbers
are described in last patch's commit description. Please refer it.
Thanks.
Joonsoo Kim (17):
mm/slab: fix stale code comment
mm/slab: remove useless structure define
mm/slab: remove the checks for slab implementation bug
mm/slab: activate debug_pagealloc in SLAB when it is actually enabled
mm/slab: use more appropriate condition check for debug_pagealloc
mm/slab: clean up DEBUG_PAGEALLOC processing code
mm/slab: alternative implementation for DEBUG_SLAB_LEAK
mm/slab: remove object status buffer for DEBUG_SLAB_LEAK
mm/slab: put the freelist at the end of slab page
mm/slab: align cache size first before determination of OFF_SLAB
candidate
mm/slab: clean up cache type determination
mm/slab: do not change cache size if debug pagealloc isn't possible
mm/slab: make criteria for off slab determination robust and simple
mm/slab: factor out slab list fixup code
mm/slab: factor out debugging initialization in cache_init_objs()
mm/slab: introduce new slab management type, OBJFREELIST_SLAB
mm/slab: avoid returning values by reference
include/linux/mm.h | 12 +-
include/linux/slab_def.h | 3 +
mm/slab.c | 626 ++++++++++++++++++++++++++---------------------
3 files changed, 362 insertions(+), 279 deletions(-)
--
1.9.1
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