From: Gao Xiang <gaoxiang25@huawei.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: <linux-fsdevel@vger.kernel.org>, <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: Re: [PATCH v6 12/19] erofs: Convert uncompressed files from readpages to readahead
Date: Wed, 19 Feb 2020 10:39:48 +0800 [thread overview]
Message-ID: <20200219023948.GB83440@architecture4> (raw)
In-Reply-To: <20200217184613.19668-21-willy@infradead.org>
On Mon, Feb 17, 2020 at 10:46:01AM -0800, Matthew Wilcox wrote:
> From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
>
> Use the new readahead operation in erofs
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
> ---
It looks good to me, and will test it later as well..
Acked-by: Gao Xiang <gaoxiang25@huawei.com>
Thanks,
Gao Xiang
> fs/erofs/data.c | 39 +++++++++++++-----------------------
> fs/erofs/zdata.c | 2 +-
> include/trace/events/erofs.h | 6 +++---
> 3 files changed, 18 insertions(+), 29 deletions(-)
>
> diff --git a/fs/erofs/data.c b/fs/erofs/data.c
> index fc3a8d8064f8..82ebcee9d178 100644
> --- a/fs/erofs/data.c
> +++ b/fs/erofs/data.c
> @@ -280,47 +280,36 @@ static int erofs_raw_access_readpage(struct file *file, struct page *page)
> return 0;
> }
>
> -static int erofs_raw_access_readpages(struct file *filp,
> - struct address_space *mapping,
> - struct list_head *pages,
> - unsigned int nr_pages)
> +static void erofs_raw_access_readahead(struct readahead_control *rac)
> {
> erofs_off_t last_block;
> struct bio *bio = NULL;
> - gfp_t gfp = readahead_gfp_mask(mapping);
> - struct page *page = list_last_entry(pages, struct page, lru);
> -
> - trace_erofs_readpages(mapping->host, page, nr_pages, true);
> + struct page *page;
>
> - for (; nr_pages; --nr_pages) {
> - page = list_entry(pages->prev, struct page, lru);
> + trace_erofs_readpages(rac->mapping->host, readahead_index(rac),
> + readahead_count(rac), true);
>
> + readahead_for_each(rac, page) {
> prefetchw(&page->flags);
> - list_del(&page->lru);
>
> - if (!add_to_page_cache_lru(page, mapping, page->index, gfp)) {
> - bio = erofs_read_raw_page(bio, mapping, page,
> - &last_block, nr_pages, true);
> + bio = erofs_read_raw_page(bio, rac->mapping, page, &last_block,
> + readahead_count(rac), true);
>
> - /* all the page errors are ignored when readahead */
> - if (IS_ERR(bio)) {
> - pr_err("%s, readahead error at page %lu of nid %llu\n",
> - __func__, page->index,
> - EROFS_I(mapping->host)->nid);
> + /* all the page errors are ignored when readahead */
> + if (IS_ERR(bio)) {
> + pr_err("%s, readahead error at page %lu of nid %llu\n",
> + __func__, page->index,
> + EROFS_I(rac->mapping->host)->nid);
>
> - bio = NULL;
> - }
> + bio = NULL;
> }
>
> - /* pages could still be locked */
> put_page(page);
> }
> - DBG_BUGON(!list_empty(pages));
>
> /* the rare case (end in gaps) */
> if (bio)
> submit_bio(bio);
> - return 0;
> }
>
> static int erofs_get_block(struct inode *inode, sector_t iblock,
> @@ -358,7 +347,7 @@ static sector_t erofs_bmap(struct address_space *mapping, sector_t block)
> /* for uncompressed (aligned) files and raw access for other files */
> const struct address_space_operations erofs_raw_access_aops = {
> .readpage = erofs_raw_access_readpage,
> - .readpages = erofs_raw_access_readpages,
> + .readahead = erofs_raw_access_readahead,
> .bmap = erofs_bmap,
> };
>
> diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c
> index 80e47f07d946..17f45fcb8c5c 100644
> --- a/fs/erofs/zdata.c
> +++ b/fs/erofs/zdata.c
> @@ -1315,7 +1315,7 @@ static int z_erofs_readpages(struct file *filp, struct address_space *mapping,
> struct page *head = NULL;
> LIST_HEAD(pagepool);
>
> - trace_erofs_readpages(mapping->host, lru_to_page(pages),
> + trace_erofs_readpages(mapping->host, lru_to_page(pages)->index,
> nr_pages, false);
>
> f.headoffset = (erofs_off_t)lru_to_page(pages)->index << PAGE_SHIFT;
> diff --git a/include/trace/events/erofs.h b/include/trace/events/erofs.h
> index 27f5caa6299a..bf9806fd1306 100644
> --- a/include/trace/events/erofs.h
> +++ b/include/trace/events/erofs.h
> @@ -113,10 +113,10 @@ TRACE_EVENT(erofs_readpage,
>
> TRACE_EVENT(erofs_readpages,
>
> - TP_PROTO(struct inode *inode, struct page *page, unsigned int nrpage,
> + TP_PROTO(struct inode *inode, pgoff_t start, unsigned int nrpage,
> bool raw),
>
> - TP_ARGS(inode, page, nrpage, raw),
> + TP_ARGS(inode, start, nrpage, raw),
>
> TP_STRUCT__entry(
> __field(dev_t, dev )
> @@ -129,7 +129,7 @@ TRACE_EVENT(erofs_readpages,
> TP_fast_assign(
> __entry->dev = inode->i_sb->s_dev;
> __entry->nid = EROFS_I(inode)->nid;
> - __entry->start = page->index;
> + __entry->start = start;
> __entry->nrpage = nrpage;
> __entry->raw = raw;
> ),
> --
> 2.25.0
>
>
next prev parent reply other threads:[~2020-02-19 2:41 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 18:45 [PATCH v6 00/19] Change readahead API Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 01/19] mm: Return void from various readahead functions Matthew Wilcox
2020-02-18 4:47 ` Dave Chinner
2020-02-18 21:05 ` John Hubbard
2020-02-18 21:21 ` Matthew Wilcox
2020-02-18 21:52 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 02/19] mm: Ignore return value of ->readpages Matthew Wilcox
2020-02-18 4:48 ` Dave Chinner
2020-02-18 21:33 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 03/19] mm: Use readahead_control to pass arguments Matthew Wilcox
2020-02-18 5:03 ` Dave Chinner
2020-02-18 13:56 ` Matthew Wilcox
2020-02-18 22:46 ` Dave Chinner
2020-02-18 22:52 ` Matthew Wilcox
2020-02-18 22:22 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 04/19] mm: Rearrange readahead loop Matthew Wilcox
2020-02-18 5:08 ` Dave Chinner
2020-02-18 13:57 ` Matthew Wilcox
2020-02-18 22:48 ` Dave Chinner
2020-02-18 22:33 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 04/16] mm: Tweak readahead loop slightly Matthew Wilcox
2020-02-18 22:57 ` John Hubbard
2020-02-18 23:00 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 05/16] mm: Put readahead pages in cache earlier Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 05/19] mm: Remove 'page_offset' from readahead loop Matthew Wilcox
2020-02-18 5:14 ` Dave Chinner
2020-02-18 23:08 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 06/16] mm: Add readahead address space operation Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 06/19] mm: rename readahead loop variable to 'i' Matthew Wilcox
2020-02-18 5:33 ` Dave Chinner
2020-02-18 23:11 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 07/16] mm: Add page_cache_readahead_limit Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 07/19] mm: Put readahead pages in cache earlier Matthew Wilcox
2020-02-18 6:14 ` Dave Chinner
2020-02-18 15:42 ` Matthew Wilcox
2020-02-19 0:59 ` Dave Chinner
2020-02-19 0:01 ` John Hubbard
2020-02-19 1:02 ` Matthew Wilcox
2020-02-19 1:13 ` John Hubbard
2020-02-19 3:24 ` John Hubbard
2020-02-19 14:41 ` Matthew Wilcox
2020-02-19 14:52 ` Christoph Hellwig
2020-02-19 15:01 ` Matthew Wilcox
2020-02-19 20:24 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 08/16] fs: Convert mpage_readpages to mpage_readahead Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 08/19] mm: Add readahead address space operation Matthew Wilcox
2020-02-18 6:21 ` Dave Chinner
2020-02-18 16:10 ` Matthew Wilcox
2020-02-19 1:04 ` Dave Chinner
2020-02-19 0:12 ` John Hubbard
2020-02-19 3:10 ` Eric Biggers
2020-02-19 3:35 ` Eric Biggers
2020-02-19 16:52 ` Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 09/16] btrfs: Convert from readpages to readahead Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 09/19] mm: Add page_cache_readahead_limit Matthew Wilcox
2020-02-18 6:31 ` Dave Chinner
2020-02-18 19:54 ` Matthew Wilcox
2020-02-19 1:08 ` Dave Chinner
2020-02-19 1:32 ` John Hubbard
2020-02-19 2:23 ` Matthew Wilcox
2020-02-19 2:46 ` John Hubbard
2020-02-17 18:45 ` [PATCH v6 10/16] erofs: Convert uncompressed files from readpages to readahead Matthew Wilcox
2020-02-17 18:45 ` [PATCH v6 10/19] fs: Convert mpage_readpages to mpage_readahead Matthew Wilcox
2020-02-18 1:51 ` [Ocfs2-devel] " Joseph Qi
2020-02-18 6:37 ` Dave Chinner
2020-02-19 2:48 ` John Hubbard
2020-02-19 3:28 ` Eric Biggers
2020-02-19 3:47 ` Matthew Wilcox
2020-02-19 3:55 ` Eric Biggers
2020-02-17 18:45 ` [PATCH v6 11/19] btrfs: Convert from readpages to readahead Matthew Wilcox
2020-02-18 6:57 ` Dave Chinner
2020-02-18 21:12 ` Matthew Wilcox
2020-02-19 1:23 ` Dave Chinner
2020-02-17 18:46 ` [PATCH v6 11/16] erofs: Convert compressed files " Matthew Wilcox
2020-02-19 2:34 ` Gao Xiang
2020-02-17 18:46 ` [PATCH v6 12/19] erofs: Convert uncompressed " Matthew Wilcox
2020-02-19 2:39 ` Gao Xiang [this message]
2020-02-19 3:04 ` Dave Chinner
2020-02-17 18:46 ` [PATCH v6 12/16] ext4: Convert " Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 13/19] erofs: Convert compressed files " Matthew Wilcox
2020-02-19 3:08 ` Dave Chinner
2020-02-17 18:46 ` [PATCH v6 13/16] f2fs: Convert " Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 14/19] ext4: " Matthew Wilcox
2020-02-19 3:16 ` Dave Chinner
2020-02-19 3:29 ` Eric Biggers
2020-02-17 18:46 ` [PATCH v6 14/16] fuse: " Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 15/19] f2fs: " Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 15/16] iomap: " Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 16/19] fuse: " Matthew Wilcox
2020-02-19 3:22 ` Dave Chinner
2020-02-17 18:46 ` [PATCH v6 16/16] mm: Use memalloc_nofs_save in readahead path Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 17/19] iomap: Restructure iomap_readpages_actor Matthew Wilcox
2020-02-19 3:17 ` John Hubbard
2020-02-19 5:35 ` Matthew Wilcox
2020-02-19 3:29 ` Dave Chinner
2020-02-19 6:04 ` Matthew Wilcox
2020-02-19 6:40 ` Dave Chinner
2020-02-19 17:06 ` Matthew Wilcox
2020-02-17 18:46 ` [PATCH v6 18/19] iomap: Convert from readpages to readahead Matthew Wilcox
2020-02-19 3:40 ` Dave Chinner
2020-02-17 18:46 ` [PATCH v6 19/19] mm: Use memalloc_nofs_save in readahead path Matthew Wilcox
2020-02-19 3:43 ` Dave Chinner
2020-02-19 5:22 ` Matthew Wilcox
2020-02-17 18:48 ` [PATCH v6 00/19] Change readahead API Matthew Wilcox
2020-02-18 4:56 ` Dave Chinner
2020-02-18 13:42 ` Matthew Wilcox
2020-02-18 21:26 ` Dave Chinner
2020-02-19 3:45 ` Dave Chinner
2020-02-19 3:48 ` Matthew Wilcox
2020-02-19 3:57 ` Dave Chinner
2020-02-18 20:49 ` John Hubbard
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