linux-kernel - Re: [f2fs-dev] [PATCH v3 13/23] f2fs: Convert f2fs_sync_node_pages() to use filemap_get_folios

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Date:   Sat, 29 Oct 2022 12:47:30 +0800
From:   Chao Yu <chao@...nel.org>
To:     "Vishal Moola (Oracle)" <vishal.moola@...il.com>,
        linux-fsdevel@...r.kernel.org
Cc:     linux-cifs@...r.kernel.org, linux-nilfs@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, cluster-devel@...hat.com,
        linux-mm@...ck.org, ceph-devel@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-afs@...ts.infradead.org,
        linux-btrfs@...r.kernel.org
Subject: Re: [f2fs-dev] [PATCH v3 13/23] f2fs: Convert f2fs_sync_node_pages()
 to use filemap_get_folios_tag()

On 2022/10/18 4:24, Vishal Moola (Oracle) wrote:
> Convert function to use a folio_batch instead of pagevec. This is in
> preparation for the removal of find_get_pages_range_tag().
> 
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>

Acked-by: Chao Yu <chao@...nel.org>

Thanks,

> ---
>   fs/f2fs/node.c | 17 +++++++++--------
>   1 file changed, 9 insertions(+), 8 deletions(-)
> 
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index a2f477cc48c7..38f32b4d61dc 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -1935,23 +1935,24 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
>   				bool do_balance, enum iostat_type io_type)
>   {
>   	pgoff_t index;
> -	struct pagevec pvec;
> +	struct folio_batch fbatch;
>   	int step = 0;
>   	int nwritten = 0;
>   	int ret = 0;
> -	int nr_pages, done = 0;
> +	int nr_folios, done = 0;
>   
> -	pagevec_init(&pvec);
> +	folio_batch_init(&fbatch);
>   
>   next_step:
>   	index = 0;
>   
> -	while (!done && (nr_pages = pagevec_lookup_tag(&pvec,
> -			NODE_MAPPING(sbi), &index, PAGECACHE_TAG_DIRTY))) {
> +	while (!done && (nr_folios = filemap_get_folios_tag(NODE_MAPPING(sbi),
> +				&index, (pgoff_t)-1, PAGECACHE_TAG_DIRTY,
> +				&fbatch))) {
>   		int i;
>   
> -		for (i = 0; i < nr_pages; i++) {
> -			struct page *page = pvec.pages[i];
> +		for (i = 0; i < nr_folios; i++) {
> +			struct page *page = &fbatch.folios[i]->page;
>   			bool submitted = false;
>   
>   			/* give a priority to WB_SYNC threads */
> @@ -2026,7 +2027,7 @@ int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,
>   			if (--wbc->nr_to_write == 0)
>   				break;
>   		}
> -		pagevec_release(&pvec);
> +		folio_batch_release(&fbatch);
>   		cond_resched();
>   
>   		if (wbc->nr_to_write == 0) {