linux-kernel - Re: [PATCHv3 02/11] drm/i915/gem: Convert __shmem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <gtknttjvbestmrulqy2w5afqzcdetnrrgcgcfz4fwqb5zg2p4e@pow2uwawcjt4>
Date: Fri, 31 Jan 2025 12:27:40 -0800
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, 
	"Matthew Wilcox (Oracle)" <willy@...radead.org>, Jens Axboe <axboe@...nel.dk>, 
	"Jason A. Donenfeld" <Jason@...c4.com>, Andi Shyti <andi.shyti@...ux.intel.com>, 
	Chengming Zhou <chengming.zhou@...ux.dev>, Christian Brauner <brauner@...nel.org>, 
	Christophe Leroy <christophe.leroy@...roup.eu>, Dan Carpenter <dan.carpenter@...aro.org>, 
	David Airlie <airlied@...il.com>, David Hildenbrand <david@...hat.com>, Hao Ge <gehao@...inos.cn>, 
	Jani Nikula <jani.nikula@...ux.intel.com>, Johannes Weiner <hannes@...xchg.org>, 
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>, Josef Bacik <josef@...icpanda.com>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Miklos Szeredi <miklos@...redi.hu>, Nhat Pham <nphamcs@...il.com>, 
	Oscar Salvador <osalvador@...e.de>, Ran Xiaokai <ran.xiaokai@....com.cn>, 
	Rodrigo Vivi <rodrigo.vivi@...el.com>, Simona Vetter <simona@...ll.ch>, 
	Steven Rostedt <rostedt@...dmis.org>, Tvrtko Ursulin <tursulin@...ulin.net>, 
	Vlastimil Babka <vbabka@...e.cz>, Yosry Ahmed <yosryahmed@...gle.com>, Yu Zhao <yuzhao@...gle.com>, 
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCHv3 02/11] drm/i915/gem: Convert __shmem_writeback() to
 folios

On Thu, Jan 30, 2025 at 12:00:40PM +0200, Kirill A. Shutemov wrote:
> Use folios instead of pages.
> 
> This is preparation for removing PG_reclaim.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Acked-by: David Hildenbrand <david@...hat.com>
> ---
>  drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
> index fe69f2c8527d..9016832b20fc 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
> @@ -320,25 +320,25 @@ void __shmem_writeback(size_t size, struct address_space *mapping)
>  
>  	/* Begin writeback on each dirty page */
>  	for (i = 0; i < size >> PAGE_SHIFT; i++) {

With folio conversion, should the iteration step be folio_nr_pages()
instead of 1?

> -		struct page *page;
> +		struct folio *folio;
>  
> -		page = find_lock_page(mapping, i);
> -		if (!page)
> +		folio = filemap_lock_folio(mapping, i);
> +		if (!folio)
>  			continue;
>  
> -		if (!page_mapped(page) && clear_page_dirty_for_io(page)) {
> +		if (!folio_mapped(folio) && folio_clear_dirty_for_io(folio)) {
>  			int ret;
>  
> -			SetPageReclaim(page);
> -			ret = mapping->a_ops->writepage(page, &wbc);
> +			folio_set_reclaim(folio);
> +			ret = mapping->a_ops->writepage(&folio->page, &wbc);
>  			if (!PageWriteback(page))
> -				ClearPageReclaim(page);
> +				folio_clear_reclaim(folio);
>  			if (!ret)
>  				goto put;
>  		}
> -		unlock_page(page);
> +		folio_unlock(folio);
>  put:
> -		put_page(page);
> +		folio_put(folio);
>  	}
>  }
>  
> -- 
> 2.47.2
>