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SubjectRe: [PATCH 2/2] zram: idle memory tracking
On (03/26/18 15:49), Minchan Kim wrote:
> zRam as swap is useful for small memory device. However, swap means
> those pages on zram are mostly cold pages due to VM's LRU algorithm.
> Especially, once init data for application are touched for launching,
> they tend to be not accessed any more and finally swapped out.
> zRAM can store such cold pages as compressed form but it's pointless
> to keep in memory. Better idea is app developers free them directly
> rather than remaining them on heap.
>
> This patch tell us last accesss time of each block of zram via
> "cat /sys/kernel/debug/zram/zram0/access_time".
>
> The output is as follows,
>
> 276 1250
> 277 1800
> .. ..
> .. ..

So can we just use CONFIG_IDLE_PAGE_TRACKING + CONFIG_PAGE_OWNER?

-ss

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