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 <joeypabali...@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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