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From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Yu Zhao <yuzhao@google.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
	Hugh Dickins <hughd@google.com>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Matthew Wilcox <willy@infradead.org>,
	Vlastimil Babka <vbabka@suse.cz>, Yang Shi <shy828301@gmail.com>,
	Zi Yan <ziy@nvidia.com>,
	linux-kernel@vger.kernel.org, Shuang Zhai <zhais@google.com>
Subject: Re: [PATCH 3/3] mm: don't remap clean subpages when splitting isolated thp
Date: Wed, 4 Aug 2021 17:27:29 +0300	[thread overview]
Message-ID: <20210804142729.iqtslnn3utvqgec3@box.shutemov.name> (raw)
In-Reply-To: <20210731063938.1391602-4-yuzhao@google.com>

On Sat, Jul 31, 2021 at 12:39:38AM -0600, Yu Zhao wrote:
> @@ -267,13 +308,19 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
>   * Get rid of all migration entries and replace them by
>   * references to the indicated page.
>   */
> -void remove_migration_ptes(struct page *old, struct page *new, bool locked)
> +void remove_migration_ptes(struct page *old, struct page *new, bool locked, bool unmap_clean)
>  {
> +	struct rmap_walk_arg rmap_walk_arg = {
> +		.page = old,
> +		.unmap_clean = unmap_clean,
> +	};
>  	struct rmap_walk_control rwc = {
>  		.rmap_one = remove_migration_pte,
> -		.arg = old,
> +		.arg = &rmap_walk_arg,
>  	};

'old' pointer has few low always-zero bit :P

-- 
 Kirill A. Shutemov

      parent reply	other threads:[~2021-08-04 14:27 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-31  6:39 [PATCH 0/3] mm: optimize thp for reclaim and migration Yu Zhao
2021-07-31  6:39 ` [PATCH 1/3] mm: don't take lru lock when splitting isolated thp Yu Zhao
2021-07-31  6:39 ` [PATCH 2/3] mm: free zapped tail pages " Yu Zhao
2021-08-04 14:22   ` Kirill A. Shutemov
2021-08-08 17:28     ` Yu Zhao
2021-08-05  0:13   ` Yang Shi
2021-08-08 17:49     ` Yu Zhao
2021-08-11 22:25       ` Yang Shi
2021-08-11 23:12         ` Yu Zhao
2021-08-13 23:24           ` Yang Shi
2021-08-13 23:56             ` Yu Zhao
2021-08-14  0:30               ` Yang Shi
2021-08-14  1:49                 ` Yu Zhao
2021-08-14  2:34                   ` Yang Shi
2021-07-31  6:39 ` [PATCH 3/3] mm: don't remap clean subpages " Yu Zhao
2021-07-31  9:53   ` kernel test robot
2021-07-31 15:45   ` kernel test robot
2021-08-03 11:25   ` Matthew Wilcox
2021-08-03 11:36   ` Matthew Wilcox
2021-08-08 17:21     ` Yu Zhao
2021-08-04 14:27   ` Kirill A. Shutemov [this message]

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