On Wed, Aug 16, 2017 at 11:19:41AM +0800, Hui Zhu wrote:
> After commit [1] zs_page_migrate can handle the ZS_EMPTY zspage.
>
> But I got some false in zs_page_isolate:
> if (get_zspage_inuse(zspage) == 0) {
> spin_unlock(&class->lock);
> return false;
> }
> The page of this zspage was migrated in before.
>
> The reason is commit [1] just handle the "page" but not "newpage"
> then it keep the "newpage" with a empty zspage inside system.
> Root cause is zs_page_isolate remove it from ZS_EMPTY list but not
> call zs_page_putback "schedule_work(&pool->free_work);". Because
> zs_page_migrate done the job without "schedule_work(&pool->free_work);"
>
> Make this patch let zs_page_migrate wake up free_work if need.
>
> [1]
> zsmalloc-zs_page_migrate-skip-unnecessary-loops-but-not-return-ebusy-if-zspage-is-not-inuse-fix.patch
>
> Signed-off-by: Hui Zhu <[email protected]>
Acked-by: Minchan Kim <[email protected]>
Thanks!
