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Tue, 11 Feb 2020 01:03:56 +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; bh=Cu/jfqkew46d05JGO+29Z0vrqq1/fRZdHvgOzZKjCA0=; b=kOg9wjRUC7C18iwESxcnWJrZrR V3tkZcjhHeVmfimSc44JFZcjLElcmP+SchZdytjEvA39AOD9nbOjOB+soktEuYu78/gPDsE5iKxz3 7U2JZKEGGYBI9lYufgvjs56GaqW+yASazHzITjdyq1qlnIeeaxlFWp/QtNswK94l7Xaent1qIDz5c ClLqULTMvor/kXdvQr0SGJg6VT684S6I6sIXKo2KXMumTF1FizEBImCToFz+i+8NSooKMyiUkDvnb ezjFgrUNc7JNtuKhXanEgfDLRrDctrAAE9VxqrfZS0dO/VY4bufKsEY1+rd85HMUEms+ajq58doSd VjIsDfHQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1Jxu-0001oL-Lc; Tue, 11 Feb 2020 01:03:50 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, ocfs2-devel@oss.oracle.com, linux-xfs@vger.kernel.org Subject: [PATCH v5 11/13] f2fs: Convert from readpages to readahead Date: Mon, 10 Feb 2020 17:03:46 -0800 Message-Id: <20200211010348.6872-12-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200211010348.6872-1-willy@infradead.org> References: <20200211010348.6872-1-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) --- fs/f2fs/data.c | 50 +++++++++++++++---------------------- fs/f2fs/f2fs.h | 5 ++-- include/trace/events/f2fs.h | 6 ++--- 3 files changed, 25 insertions(+), 36 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b27b72107911..87964e4cb6b8 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2159,13 +2159,11 @@ 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 inode *inode, struct readahead_control *= rac, + struct page *page) { struct bio *bio =3D NULL; sector_t last_block_in_bio =3D 0; - struct inode *inode =3D mapping->host; struct f2fs_map_blocks map; #ifdef CONFIG_F2FS_FS_COMPRESSION struct compress_ctx cc =3D { @@ -2179,6 +2177,7 @@ int f2fs_mpage_readpages(struct address_space *mapp= ing, .nr_cpages =3D 0, }; #endif + unsigned nr_pages =3D rac ? readahead_count(rac) : 1; unsigned max_nr_pages =3D nr_pages; int ret =3D 0; =20 @@ -2192,15 +2191,9 @@ int f2fs_mpage_readpages(struct address_space *map= ping, map.m_may_create =3D false; =20 for (; nr_pages; nr_pages--) { - if (pages) { - page =3D list_last_entry(pages, struct page, lru); - + if (rac) { + page =3D readahead_page(rac); 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 @@ -2210,7 +2203,7 @@ int f2fs_mpage_readpages(struct address_space *mapp= ing, ret =3D f2fs_read_multi_pages(&cc, &bio, max_nr_pages, &last_block_in_bio, - is_readahead); + rac); f2fs_destroy_compress_ctx(&cc); if (ret) goto set_error_page; @@ -2233,7 +2226,7 @@ int f2fs_mpage_readpages(struct address_space *mapp= ing, #endif =20 ret =3D f2fs_read_single_page(inode, page, max_nr_pages, &map, - &bio, &last_block_in_bio, is_readahead); + &bio, &last_block_in_bio, rac); if (ret) { #ifdef CONFIG_F2FS_FS_COMPRESSION set_error_page: @@ -2242,8 +2235,10 @@ int f2fs_mpage_readpages(struct address_space *map= ping, zero_user_segment(page, 0, PAGE_SIZE); unlock_page(page); } +#ifdef CONFIG_F2FS_FS_COMPRESSION next_page: - if (pages) +#endif + if (rac) put_page(page); =20 #ifdef CONFIG_F2FS_FS_COMPRESSION @@ -2253,16 +2248,15 @@ int f2fs_mpage_readpages(struct address_space *ma= pping, ret =3D f2fs_read_multi_pages(&cc, &bio, max_nr_pages, &last_block_in_bio, - is_readahead); + rac); f2fs_destroy_compress_ctx(&cc); } } #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) @@ -2281,28 +2275,24 @@ static int f2fs_read_data_page(struct file *file,= struct page *page) if (f2fs_has_inline_data(inode)) 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); + ret =3D f2fs_mpage_readpages(inode, NULL, page); return ret; } =20 -static int f2fs_read_data_pages(struct file *file, - struct address_space *mapping, - struct list_head *pages, unsigned nr_pages) +static void f2fs_readahead(struct readahead_control *rac) { - struct inode *inode =3D mapping->host; - struct page *page =3D list_last_entry(pages, struct page, lru); + struct inode *inode =3D rac->mapping->host; =20 - trace_f2fs_readpages(inode, page, nr_pages); + trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac))= ; =20 if (!f2fs_is_compress_backend_ready(inode)) - return 0; + return; =20 /* If the file has inline data, skip readpages */ if (f2fs_has_inline_data(inode)) - return 0; + return; =20 - return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true); + f2fs_mpage_readpages(inode, rac, NULL); } =20 int f2fs_encrypt_one_page(struct f2fs_io_info *fio) @@ -3784,7 +3774,7 @@ 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..b5e72dee8826 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 inode *inode, struct readahead_control *= rac, + struct page *page); 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/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 2.25.0