From: David Hildenbrand <david@redhat.com>
To: Zi Yan <ziy@nvidia.com>,
"Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>,
linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
"Yang Shi" <shy828301@gmail.com>, "Yu Zhao" <yuzhao@google.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
"Ryan Roberts" <ryan.roberts@arm.com>,
"Michal Koutný" <mkoutny@suse.com>,
"Roman Gushchin" <roman.gushchin@linux.dev>,
"Zach O'Keefe" <zokeefe@google.com>,
"Hugh Dickins" <hughd@google.com>,
"Luis Chamberlain" <mcgrof@kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v5 6/8] mm: page_owner: add support for splitting to any order in split page_owner.
Date: Wed, 28 Feb 2024 11:31:50 +0100 [thread overview]
Message-ID: <75fb8bf8-f9bc-410d-8c22-f69cbf2080a9@redhat.com> (raw)
In-Reply-To: <20240226205534.1603748-7-zi.yan@sent.com>
On 26.02.24 21:55, Zi Yan wrote:
> From: Zi Yan <ziy@nvidia.com>
>
> It adds a new_order parameter to set new page order in page owner.
> It prepares for upcoming changes to support split huge page to any
> lower order.
>
> Signed-off-by: Zi Yan <ziy@nvidia.com>
> ---
> include/linux/page_owner.h | 13 ++++++++-----
> mm/huge_memory.c | 2 +-
> mm/page_alloc.c | 4 ++--
> mm/page_owner.c | 7 +++----
> 4 files changed, 14 insertions(+), 12 deletions(-)
>
> diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h
> index 2b39c8e19d98..debdc25f08b9 100644
> --- a/include/linux/page_owner.h
> +++ b/include/linux/page_owner.h
> @@ -11,7 +11,8 @@ extern struct page_ext_operations page_owner_ops;
> extern void __reset_page_owner(struct page *page, unsigned short order);
> extern void __set_page_owner(struct page *page,
> unsigned short order, gfp_t gfp_mask);
> -extern void __split_page_owner(struct page *page, int order);
> +extern void __split_page_owner(struct page *page, int old_order,
> + int new_order);
> extern void __folio_copy_owner(struct folio *newfolio, struct folio *old);
> extern void __set_page_owner_migrate_reason(struct page *page, int reason);
> extern void __dump_page_owner(const struct page *page);
> @@ -31,10 +32,11 @@ static inline void set_page_owner(struct page *page,
> __set_page_owner(page, order, gfp_mask);
> }
>
> -static inline void split_page_owner(struct page *page, int order)
> +static inline void split_page_owner(struct page *page, int old_order,
> + int new_order)
> {
> if (static_branch_unlikely(&page_owner_inited))
> - __split_page_owner(page, order);
> + __split_page_owner(page, old_order, new_order);
> }
> static inline void folio_copy_owner(struct folio *newfolio, struct folio *old)
> {
> @@ -56,10 +58,11 @@ static inline void reset_page_owner(struct page *page, unsigned short order)
> {
> }
> static inline void set_page_owner(struct page *page,
> - unsigned int order, gfp_t gfp_mask)
> + unsigned short order, gfp_t gfp_mask)
> {
> }
> -static inline void split_page_owner(struct page *page, int order)
> +static inline void split_page_owner(struct page *page, int old_order,
> + int new_order)
> {
> }
> static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio)
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 5d4b7c17b9bc..b2df788c11fa 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -2933,7 +2933,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
> unlock_page_lruvec(lruvec);
> /* Caller disabled irqs, so they are still disabled here */
>
> - split_page_owner(head, order);
> + split_page_owner(head, order, 0);
>
> /* See comment in __split_huge_page_tail() */
> if (PageAnon(head)) {
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index c31a468fe317..cc41341c08f4 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -2652,7 +2652,7 @@ void split_page(struct page *page, unsigned int order)
>
> for (i = 1; i < (1 << order); i++)
> set_page_refcounted(page + i);
> - split_page_owner(page, order);
> + split_page_owner(page, order, 0);
> split_page_memcg(page, order, 0);
> }
> EXPORT_SYMBOL_GPL(split_page);
> @@ -4839,7 +4839,7 @@ static void *make_alloc_exact(unsigned long addr, unsigned int order,
> struct page *page = virt_to_page((void *)addr);
> struct page *last = page + nr;
>
> - split_page_owner(page, order);
> + split_page_owner(page, order, 0);
> split_page_memcg(page, order, 0);
> while (page < --last)
> set_page_refcounted(last);
> diff --git a/mm/page_owner.c b/mm/page_owner.c
> index b678f7a6e702..033e349f6479 100644
> --- a/mm/page_owner.c
> +++ b/mm/page_owner.c
> @@ -306,19 +306,18 @@ void __set_page_owner_migrate_reason(struct page *page, int reason)
> page_ext_put(page_ext);
> }
>
> -void __split_page_owner(struct page *page, int order)
> +void __split_page_owner(struct page *page, int old_order, int new_order)
> {
> int i;
> struct page_ext *page_ext = page_ext_get(page);
> struct page_owner *page_owner;
> - unsigned int nr = 1 << order;
>
> if (unlikely(!page_ext))
> return;
>
> - for (i = 0; i < nr; i++) {
> + for (i = 0; i < (1 << old_order); i++) {
> page_owner = get_page_owner(page_ext);
> - page_owner->order = 0;
> + page_owner->order = new_order;
> page_ext = page_ext_next(page_ext);
> }
> page_ext_put(page_ext);
Acked-by: David Hildenbrand <david@redhat.com>
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2024-02-28 10:31 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-26 20:55 [PATCH v5 0/8] Split a folio to any lower order folios Zi Yan
2024-02-26 20:55 ` [PATCH v5 1/8] mm/huge_memory: only split PMD mapping when necessary in unmap_folio() Zi Yan
2024-02-28 10:30 ` David Hildenbrand
2024-02-26 20:55 ` [PATCH v5 2/8] mm: Support order-1 folios in the page cache Zi Yan
2024-02-26 20:55 ` [PATCH v5 3/8] mm/memcg: use order instead of nr in split_page_memcg() Zi Yan
2024-02-26 20:55 ` [PATCH v5 4/8] mm/page_owner: use order instead of nr in split_page_owner() Zi Yan
2024-02-26 20:55 ` [PATCH v5 5/8] mm: memcg: make memcg huge page split support any order split Zi Yan
2024-02-26 20:55 ` [PATCH v5 6/8] mm: page_owner: add support for splitting to any order in split page_owner Zi Yan
2024-02-28 10:31 ` David Hildenbrand [this message]
2024-02-26 20:55 ` [PATCH v5 7/8] mm: thp: split huge page to any lower order pages Zi Yan
2024-02-28 8:23 ` Ryan Roberts
2024-02-28 15:42 ` Zi Yan
2024-02-28 15:44 ` Ryan Roberts
2024-02-28 15:52 ` Zi Yan
2024-03-07 14:58 ` Zi Yan
2024-02-26 20:55 ` [PATCH v5 8/8] mm: huge_memory: enable debugfs to split huge pages to any order Zi Yan
2024-03-01 9:51 ` Aishwarya TCV
2024-03-01 10:33 ` Ryan Roberts
2024-03-01 12:11 ` Mark Brown
2024-03-01 12:56 ` Zi Yan
2024-03-01 14:14 ` Mark Brown
2024-03-01 12:52 ` Zi Yan
2024-03-01 13:09 ` Ryan Roberts
2024-03-01 13:53 ` Zi Yan
2024-03-01 14:18 ` Ryan Roberts
2024-03-01 14:27 ` Mark Brown
2024-03-01 15:21 ` Zi Yan
2024-03-01 19:41 ` Zi Yan
2024-03-01 14:24 ` Mark Brown
2024-03-01 14:00 ` Zi Yan
2024-03-01 14:23 ` Ryan Roberts
2024-03-01 14:33 ` Zi Yan
2024-03-01 19:37 ` Zi Yan
2024-03-01 20:02 ` Zi Yan
2024-03-01 21:10 ` Zi Yan
2024-03-04 9:50 ` Aishwarya TCV
2024-03-04 14:58 ` Zi Yan
2024-03-04 15:44 ` Aishwarya TCV
2024-03-04 15:57 ` Zi Yan
2024-03-04 18:25 ` Aishwarya TCV
2024-03-04 18:26 ` Zi Yan
2024-03-04 18:31 ` Zi Yan
2024-03-07 15:06 ` Zi Yan
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