On 2024/9/25 上午8:22, Andrew Morton wrote:
> On Wed, 14 Aug 2024 17:18:25 +0800 liuye <liuye@xxxxxxxxxx> wrote:
>
>> @@ -1669,10 +1670,12 @@ static unsigned long isolate_lru_folios(unsigned long nr_to_scan,
>> nr_pages = folio_nr_pages(folio);
>> total_scan += nr_pages;
>>
>> - if (folio_zonenum(folio) > sc->reclaim_idx ||
>> - skip_cma(folio, sc)) {
>> + /* Using max_nr_skipped to prevent hard LOCKUP*/
>> + if ((max_nr_skipped < SWAP_CLUSTER_MAX_SKIPPED) &&
>> + (folio_zonenum(folio) > sc->reclaim_idx || skip_cma(folio, sc))) {
>> nr_skipped[folio_zonenum(folio)] += nr_pages;
>> move_to = &folios_skipped;
>> + max_nr_skipped++;
>> goto move;
>
> This hunk is not applicable to current mainline.
>
Please see the PATCH v2 in link [1], and the related discussion in link [2].
Then please explain why it is not applicable,thank you.
[1]:https://lore.kernel.org/all/20240919021443.9170-1-liuye@xxxxxxxxxx/
[2]:https://lore.kernel.org/all/e878653e-d380-81c2-90a8-fd2d1d4e7287@xxxxxxxxxx/
Thanks,
liuye
