This patchset aims zram clean-up.
[1] clean up multiple pages's bvec handling.
[2] clean up partial IO handling
[3-5] clean up zram via using accessor and removing pointless structure.
With [2-5] applied, we can get a few hundred bytes as well as huge
readibility enhance.
This patchset is based on v4.11-rc4-mmotm-2017-03-30-16-31 and
*drop* zram-factor-out-partial-io-routine.patch.
x86: 708 byte save
add/remove: 1/1 grow/shrink: 0/11 up/down: 478/-1186 (-708)
function old new delta
zram_special_page_read - 478 +478
zram_reset_device 317 314 -3
mem_used_max_store 131 128 -3
compact_store 96 93 -3
mm_stat_show 203 197 -6
zram_add 719 712 -7
zram_slot_free_notify 229 214 -15
zram_make_request 819 803 -16
zram_meta_free 128 111 -17
zram_free_page 180 151 -29
disksize_store 432 361 -71
zram_decompress_page.isra 504 - -504
zram_bvec_rw 2592 2080 -512
Total: Before=25350773, After=25350065, chg -0.00%
ppc64: 231 byte save
add/remove: 2/0 grow/shrink: 1/9 up/down: 681/-912 (-231)
function old new delta
zram_special_page_read - 480 +480
zram_slot_lock - 200 +200
vermagic 39 40 +1
mm_stat_show 256 248 -8
zram_meta_free 200 184 -16
zram_add 944 912 -32
zram_free_page 348 308 -40
disksize_store 572 492 -80
zram_decompress_page 664 564 -100
zram_slot_free_notify 292 160 -132
zram_make_request 1132 1000 -132
zram_bvec_rw 2768 2396 -372
Total: Before=17565825, After=17565594, chg -0.00%
Minchan Kim (5):
[1] zram: handle multiple pages attached bio's bvec
[2] zram: partial IO refactoring
[3] zram: use zram_slot_lock instead of raw bit_spin_lock op
[4] zram: remove zram_meta structure
[5] zram: introduce zram data accessor
drivers/block/zram/zram_drv.c | 532 +++++++++++++++++++++---------------------
drivers/block/zram/zram_drv.h | 6 +-
2 files changed, 270 insertions(+), 268 deletions(-)
--
2.7.4
