From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
hch@lst.de, kent.overstreet@gmail.com
Subject: [PATCH v4 14/18] mm/filemap: Split filemap_readahead out of filemap_get_pages
Date: Thu, 21 Jan 2021 04:16:12 +0000 [thread overview]
Message-ID: <20210121041616.3955703-15-willy@infradead.org> (raw)
In-Reply-To: <20210121041616.3955703-1-willy@infradead.org>
This simplifies the error handling.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Kent Overstreet <kent.overstreet@gmail.com>
---
mm/filemap.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index df755b86a0a7b..f1c5c7d7aae8e 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2319,6 +2319,17 @@ static int filemap_create_page(struct file *file,
return error;
}
+static int filemap_readahead(struct kiocb *iocb, struct file *file,
+ struct address_space *mapping, struct page *page,
+ pgoff_t last_index)
+{
+ if (iocb->ki_flags & IOCB_NOIO)
+ return -EAGAIN;
+ page_cache_async_readahead(mapping, &file->f_ra, file, page,
+ page->index, last_index - page->index);
+ return 0;
+}
+
static int filemap_get_pages(struct kiocb *iocb, struct iov_iter *iter,
struct pagevec *pvec)
{
@@ -2356,17 +2367,15 @@ static int filemap_get_pages(struct kiocb *iocb, struct iov_iter *iter,
got_pages:
{
struct page *page = pvec->pages[pvec->nr - 1];
- pgoff_t pg_index = page->index;
if (PageReadahead(page)) {
- if (iocb->ki_flags & IOCB_NOIO) {
+ err = filemap_readahead(iocb, filp, mapping, page,
+ last_index);
+ if (err) {
put_page(page);
pvec->nr--;
- err = -EAGAIN;
goto err;
}
- page_cache_async_readahead(mapping, ra, filp, page,
- pg_index, last_index - pg_index);
}
if (!PageUptodate(page)) {
--
2.29.2
next prev parent reply other threads:[~2021-01-21 4:31 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 4:15 [PATCH v4 00/18] Refactor generic_file_buffered_read Matthew Wilcox (Oracle)
2021-01-21 4:15 ` [PATCH v4 01/18] mm/filemap: Rename generic_file_buffered_read subfunctions Matthew Wilcox (Oracle)
2021-01-21 7:30 ` Christoph Hellwig
2021-01-21 8:23 ` Miaohe Lin
2021-01-21 4:16 ` [PATCH v4 02/18] mm/filemap: Remove dynamically allocated array from filemap_read Matthew Wilcox (Oracle)
2021-01-21 7:31 ` Christoph Hellwig
2021-01-22 6:59 ` Miaohe Lin
2021-01-21 4:16 ` [PATCH v4 03/18] mm/filemap: Convert filemap_get_pages to take a pagevec Matthew Wilcox (Oracle)
2021-01-21 7:31 ` Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 04/18] mm/filemap: Use head pages in generic_file_buffered_read Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 05/18] mm/filemap: Pass a sleep state to put_and_wait_on_page_locked Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 06/18] mm/filemap: Support readpage splitting a page Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 07/18] mm/filemap: Inline __wait_on_page_locked_async into caller Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 08/18] mm/filemap: Don't call ->readpage if IOCB_WAITQ is set Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 09/18] mm/filemap: Change filemap_read_page calling conventions Matthew Wilcox (Oracle)
2021-01-21 7:31 ` Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 10/18] mm/filemap: Change filemap_create_page " Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 11/18] mm/filemap: Convert filemap_update_page to return an errno Matthew Wilcox (Oracle)
2021-01-21 7:32 ` Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 12/18] mm/filemap: Move the iocb checks into filemap_update_page Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 13/18] mm/filemap: Add filemap_range_uptodate Matthew Wilcox (Oracle)
2021-01-21 7:32 ` Christoph Hellwig
2021-01-21 4:16 ` Matthew Wilcox (Oracle) [this message]
2021-01-21 7:33 ` [PATCH v4 14/18] mm/filemap: Split filemap_readahead out of filemap_get_pages Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 15/18] mm/filemap: Restructure filemap_get_pages Matthew Wilcox (Oracle)
2021-01-21 7:33 ` Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 16/18] mm/filemap: Don't relock the page after calling readpage Matthew Wilcox (Oracle)
2021-01-21 7:34 ` Christoph Hellwig
2021-01-21 4:16 ` [PATCH v4 17/18] mm/filemap: Rename generic_file_buffered_read to filemap_read Matthew Wilcox (Oracle)
2021-01-21 4:16 ` [PATCH v4 18/18] mm/filemap: Simplify generic_file_read_iter Matthew Wilcox (Oracle)
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