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SubjectRe: [PATCH v3 0/7] zram idle page writeback
On Tue, Nov 27, 2018 at 02:54:22PM +0900, Minchan Kim wrote:
> Inherently, swap device has many idle pages which are rare touched since
> it was allocated. It is never problem if we use storage device as swap.
> However, it's just waste for zram-swap.
>
> This patchset supports zram idle page writeback feature.

Revisions look good to me. Will also try to give it some testing this
week.

Reviewed-by: Joey Pabalinas <joeypabalinas@gmail.com>

> * Admin can define what is idle page "no access since X time ago"
> * Admin can define when zram should writeback them
> * Admin can define when zram should stop writeback to prevent wearout
>
> Detail is on each patch's description.
>
> Below first two patches are -stable material so it could go first
> separately with others in this series.
>
> zram: fix lockdep warning of free block handling
> zram: fix double free backing device
>
> * from v2
> - use strscpy instead of strlcpy - Joey Pabalinas
> - remove irqlock for bitmap op - akpm
> - don't use page as stat unit - akpm
>
> * from v1
> - add fix dobule free backing device - minchan
> - change writeback/idle interface - minchan
> - remove direct incompressible page writeback - sergey
>
> Minchan Kim (7):
> zram: fix lockdep warning of free block handling
> zram: fix double free backing device
> zram: refactoring flags and writeback stuff
> zram: introduce ZRAM_IDLE flag
> zram: support idle/huge page writeback
> zram: add bd_stat statistics
> zram: writeback throttle
>
> Documentation/ABI/testing/sysfs-block-zram | 32 ++
> Documentation/blockdev/zram.txt | 51 ++-
> drivers/block/zram/Kconfig | 5 +-
> drivers/block/zram/zram_drv.c | 501 +++++++++++++++------
> drivers/block/zram/zram_drv.h | 19 +-
> 5 files changed, 446 insertions(+), 162 deletions(-)
>
> --
> 2.20.0.rc0.387.gc7a69e6b6c-goog
>

--
Cheers,
Joey Pabalinas
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