Re: [PATCH] mm, page_alloc: use check_pages_enabled static key to check tail pages

[Mel Gorman]

On Wed, Apr 05, 2023 at 04:28:40PM +0200, Vlastimil Babka wrote:
> Commit 700d2e9a36b9 ("mm, page_alloc: reduce page alloc/free sanity
> checks") has introduced a new static key check_pages_enabled to control
> when struct pages are sanity checked during allocation and freeing. Mel
> Gorman suggested that free_tail_pages_check() could use this static key
> as well, instead of relying on CONFIG_DEBUG_VM. That makes sense, so do
> that. Also rename the function to free_tail_page_prepare() because it
> works on a single tail page and has a struct page preparation component
> as well as the optional checking component.
> Also remove some unnecessary unlikely() within static_branch_unlikely()
> statements that Mel pointed out for commit 700d2e9a36b9.
> 
> Suggested-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>

Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>

-- 
Mel Gorman
SUSE Labs