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Sat, 1 Feb 2020 15:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=5KdHAUiS686jTpU0UKHCIX4BueXn8cIx7wjJa85X5I0=; b=FlVyy6qaG4IujDNRCtF80f9ySl u5mmlE5tsMA75R2R/eYDZpmR8IeeooX5NSL6xAXJCk/H+/5OJn0NPzsNOZ5WkFGxat2yok9CazbY8 1pOlT/2Ai0gOBLMnUF2xrNhDj9Pe55GWzzCiOqRfpc0eJXqS4+AnHxwDAZRaVO0ztF1uHWigPOp+l HXRKlCW9qU5wh3naAfOyhIlT9u7dCFkFf25j9ym/UMn5RYq51PhUzSsXbXfJaruowz2NAeBqJPszW 6VD6NliwDsjdULcKj4Y7T1NoMA+wy+jqvmmpBc5Ntaj6sZ2/RrVnZhTyZlszd0Okkg9ijvLICcDq7 t5xACMnQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1ixuRu-0006Hw-Cn; Sat, 01 Feb 2020 15:12:42 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Subject: [PATCH v4 10/12] f2fs: Convert from readpages to readahead Date: Sat, 1 Feb 2020 07:12:38 -0800 Message-Id: <20200201151240.24082-11-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200201151240.24082-1-willy@infradead.org> References: <20200201151240.24082-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Matthew Wilcox (Oracle)" Use the new readahead operation in f2fs Signed-off-by: Matthew Wilcox (Oracle) Cc: linux-f2fs-devel@lists.sourceforge.net --- fs/f2fs/data.c | 35 ++++++++++++++--------------------- fs/f2fs/f2fs.h | 5 ++--- fs/f2fs/verity.c | 16 +++++++++++----- include/trace/events/f2fs.h | 6 +++--- 4 files changed, 30 insertions(+), 32 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 8bd9afa81c54..80803f8b1b40 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2159,9 +2159,8 @@ int f2fs_read_multi_pages(struct compress_ctx *cc, = struct bio **bio_ret, * use ->readpage() or do the necessary surgery to decouple ->readpages(= ) * from read-ahead. */ -int f2fs_mpage_readpages(struct address_space *mapping, - struct list_head *pages, struct page *page, - unsigned nr_pages, bool is_readahead) +int f2fs_mpage_readpages(struct address_space *mapping, pgoff_t start, + struct page *page, unsigned nr_pages, bool is_readahead) { struct bio *bio =3D NULL; sector_t last_block_in_bio =3D 0; @@ -2192,15 +2191,10 @@ int f2fs_mpage_readpages(struct address_space *ma= pping, map.m_may_create =3D false; =20 for (; nr_pages; nr_pages--) { - if (pages) { - page =3D list_last_entry(pages, struct page, lru); + if (is_readahead) { + page =3D readahead_page(mapping, start++); =20 prefetchw(&page->flags); - list_del(&page->lru); - if (add_to_page_cache_lru(page, mapping, - page_index(page), - readahead_gfp_mask(mapping))) - goto next_page; } =20 #ifdef CONFIG_F2FS_FS_COMPRESSION @@ -2243,7 +2237,7 @@ int f2fs_mpage_readpages(struct address_space *mapp= ing, unlock_page(page); } next_page: - if (pages) + if (is_readahead) put_page(page); =20 #ifdef CONFIG_F2FS_FS_COMPRESSION @@ -2259,10 +2253,9 @@ int f2fs_mpage_readpages(struct address_space *map= ping, } #endif } - BUG_ON(pages && !list_empty(pages)); if (bio) __submit_bio(F2FS_I_SB(inode), bio, DATA); - return pages ? 0 : ret; + return ret; } =20 static int f2fs_read_data_page(struct file *file, struct page *page) @@ -2282,27 +2275,27 @@ static int f2fs_read_data_page(struct file *file,= struct page *page) ret =3D f2fs_read_inline_data(inode, page); if (ret =3D=3D -EAGAIN) ret =3D f2fs_mpage_readpages(page_file_mapping(page), - NULL, page, 1, false); + 0, page, 1, false); return ret; } =20 -static int f2fs_read_data_pages(struct file *file, +static unsigned f2fs_readahead(struct file *file, struct address_space *mapping, - struct list_head *pages, unsigned nr_pages) + pgoff_t start, unsigned nr_pages) { struct inode *inode =3D mapping->host; - struct page *page =3D list_last_entry(pages, struct page, lru); =20 - trace_f2fs_readpages(inode, page, nr_pages); + trace_f2fs_readpages(inode, start, nr_pages); =20 if (!f2fs_is_compress_backend_ready(inode)) return 0; =20 /* If the file has inline data, skip readpages */ if (f2fs_has_inline_data(inode)) - return 0; + return nr_pages; =20 - return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true); + f2fs_mpage_readpages(mapping, start, NULL, nr_pages, true); + return 0; } =20 int f2fs_encrypt_one_page(struct f2fs_io_info *fio) @@ -3778,7 +3771,7 @@ static void f2fs_swap_deactivate(struct file *file) =20 const struct address_space_operations f2fs_dblock_aops =3D { .readpage =3D f2fs_read_data_page, - .readpages =3D f2fs_read_data_pages, + .readahead =3D f2fs_readahead, .writepage =3D f2fs_write_data_page, .writepages =3D f2fs_write_data_pages, .write_begin =3D f2fs_write_begin, diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 5355be6b6755..db00907f90f1 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -3344,9 +3344,8 @@ int f2fs_reserve_new_block(struct dnode_of_data *dn= ); int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index); int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from); int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index); -int f2fs_mpage_readpages(struct address_space *mapping, - struct list_head *pages, struct page *page, - unsigned nr_pages, bool is_readahead); +int f2fs_mpage_readpages(struct address_space *mapping, pgoff_t start, + struct page *page, unsigned nr_pages, bool is_readahead); struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index, int op_flags, bool for_write); struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index); diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c index d7d430a6f130..71e92b9b3aa6 100644 --- a/fs/f2fs/verity.c +++ b/fs/f2fs/verity.c @@ -231,7 +231,6 @@ static int f2fs_get_verity_descriptor(struct inode *i= node, void *buf, static void f2fs_merkle_tree_readahead(struct address_space *mapping, pgoff_t start_index, unsigned long count) { - LIST_HEAD(pages); unsigned int nr_pages =3D 0; struct page *page; pgoff_t index; @@ -240,16 +239,23 @@ static void f2fs_merkle_tree_readahead(struct addre= ss_space *mapping, for (index =3D start_index; index < start_index + count; index++) { page =3D xa_load(&mapping->i_pages, index); if (!page || xa_is_value(page)) { - page =3D __page_cache_alloc(readahead_gfp_mask(mapping)); + gfp_t gfp =3D readahead_gfp_mask(mapping); + page =3D __page_cache_alloc(gfp); if (!page) break; - page->index =3D index; - list_add(&page->lru, &pages); + if (add_to_page_cache_lru(page, mapping, index, gfp)) { + put_page(page); + break; + } nr_pages++; } } + + if (!nr_pages) + return; + blk_start_plug(&plug); - f2fs_mpage_readpages(mapping, &pages, NULL, nr_pages, true); + f2fs_mpage_readpages(mapping, start_index, NULL, nr_pages, true); blk_finish_plug(&plug); } =20 diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h index 67a97838c2a0..d72da4a33883 100644 --- a/include/trace/events/f2fs.h +++ b/include/trace/events/f2fs.h @@ -1375,9 +1375,9 @@ TRACE_EVENT(f2fs_writepages, =20 TRACE_EVENT(f2fs_readpages, =20 - TP_PROTO(struct inode *inode, struct page *page, unsigned int nrpage), + TP_PROTO(struct inode *inode, pgoff_t start, unsigned int nrpage), =20 - TP_ARGS(inode, page, nrpage), + TP_ARGS(inode, start, nrpage), =20 TP_STRUCT__entry( __field(dev_t, dev) @@ -1389,7 +1389,7 @@ TRACE_EVENT(f2fs_readpages, TP_fast_assign( __entry->dev =3D inode->i_sb->s_dev; __entry->ino =3D inode->i_ino; - __entry->start =3D page->index; + __entry->start =3D start; __entry->nrpage =3D nrpage; ), =20 --=20 2.24.1