Demotion failed while running application (tested with Liblinear)

[yulistic]

Memtis does not demote pages when the top-tier memory is full. Of course, promotions do not occur.

[yulistic]

meta->idx >= memcg->warm_threshold This condition is always true. It prevents Memtis from adding pages to the demote_pages list.

Here:

memtis/linux/mm/htmm_migrater.c

Line 403 in 50560af

if (meta->idx >= memcg->warm_threshold)

and Here:

memtis/linux/mm/htmm_migrater.c

Line 408 in 50560af

if (idx >= memcg->warm_threshold)

[yulistic]

Underflow of idx occurs when running liblinear with 8 threads.

[yulistic]

The idx value, 4294967295, is 0xffffffff (-1). It may indicate pages not mapped. If so, we don't need to fix it.

[yulistic]

Let's check whether the cooling mechanism works.