Re: [PATCH v13 04/10] mm: split a folio in minimum folio order chunks

[Sven Schnelle]

Luis Chamberlain <mcgrof@xxxxxxxxxx> writes:

> On Thu, Aug 29, 2024 at 06:12:26PM -0400, Zi Yan wrote:
>> The issue is that the change to split_huge_page() makes split_huge_page_to_list_to_order()
>> unlocks the wrong subpage. split_huge_page() used to pass the “page” pointer
>> to split_huge_page_to_list_to_order(), which keeps that “page” still locked.
>> But this patch changes the “page” passed into split_huge_page_to_list_to_order()
>> always to the head page.
>> 
>> This fixes the crash on my x86 VM, but it can be improved:

It also fixes the issue on s390x. Thanks!