On Mon, May 10, 2021 at 11:00:23AM +0800, Muchun Song wrote:

In the subsequent patch, we should allocate the vmemmap pages when
freeing a HugeTLB page. But update_and_free_page() can be called
under any context, so we cannot use GFP_KERNEL to allocate vmemmap
pages. However, we can defer the actual freeing in a kworker to
prevent from using GFP_ATOMIC to allocate the vmemmap pages.

The __update_and_free_page() is where the call to allocate vmemmmap
pages will be inserted.

Signed-off-by: Muchun Song <redacted>
Reviewed-by: Mike Kravetz <redacted>

Reviewed-by: Oscar Salvador <osalvador@suse.de>


-- 
Oscar Salvador
SUSE L3