linux-kernel - Re: [PATCH 0/5] zram clean up

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Date:   Tue, 11 Apr 2017 14:38:30 +0900
From:   Minchan Kim <minchan@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        <kernel-team@....com>
Subject: Re: [PATCH 0/5] zram clean up

Hi Andrew,

Could you drop this patchset?

I will send updated version based on Sergey with some bug fixes.

zram-handle-multiple-pages-attached-bios-bvec.patch
zram-partial-io-refactoring.patch
zram-use-zram_slot_lock-instead-of-raw-bit_spin_lock-op.patch
zram-remove-zram_meta-structure.patch
zram-introduce-zram-data-accessor.patch

Thanks!

On Mon, Apr 03, 2017 at 02:17:28PM +0900, Minchan Kim wrote:
> 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
>