From: Jens Axboe <axboe@kernel.dk>
To: linux-fsdevel@vger.kernel.org
Cc: viro@zeniv.linux.org.uk, akpm@linux-foundation.org,
Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 4/4] ext4: readpages() should submit IO as read-ahead
Date: Wed, 30 May 2018 08:42:09 -0600 [thread overview]
Message-ID: <1527691329-2371-5-git-send-email-axboe@kernel.dk> (raw)
In-Reply-To: <1527691329-2371-1-git-send-email-axboe@kernel.dk>
a_ops->readpages() is only ever used for read-ahead. Ensure that we
pass this information down to the block layer.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
fs/ext4/ext4.h | 2 +-
fs/ext4/inode.c | 5 +++--
fs/ext4/readpage.c | 5 +++--
3 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index a42e71203e53..62df0322b567 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3052,7 +3052,7 @@ static inline void ext4_set_de_type(struct super_block *sb,
/* readpages.c */
extern int ext4_mpage_readpages(struct address_space *mapping,
struct list_head *pages, struct page *page,
- unsigned nr_pages);
+ unsigned nr_pages, bool is_readahead);
/* symlink.c */
extern const struct inode_operations ext4_encrypted_symlink_inode_operations;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 1e50c5efae67..2bb50d184bf5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3327,7 +3327,8 @@ static int ext4_readpage(struct file *file, struct page *page)
ret = ext4_readpage_inline(inode, page);
if (ret == -EAGAIN)
- return ext4_mpage_readpages(page->mapping, NULL, page, 1);
+ return ext4_mpage_readpages(page->mapping, NULL, page, 1,
+ false);
return ret;
}
@@ -3342,7 +3343,7 @@ ext4_readpages(struct file *file, struct address_space *mapping,
if (ext4_has_inline_data(inode))
return 0;
- return ext4_mpage_readpages(mapping, pages, NULL, nr_pages);
+ return ext4_mpage_readpages(mapping, pages, NULL, nr_pages, true);
}
static void ext4_invalidatepage(struct page *page, unsigned int offset,
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 9ffa6fad18db..28c857d3b309 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -98,7 +98,7 @@ static void mpage_end_io(struct bio *bio)
int ext4_mpage_readpages(struct address_space *mapping,
struct list_head *pages, struct page *page,
- unsigned nr_pages)
+ unsigned nr_pages, bool is_readahead)
{
struct bio *bio = NULL;
sector_t last_block_in_bio = 0;
@@ -259,7 +259,8 @@ int ext4_mpage_readpages(struct address_space *mapping,
bio->bi_iter.bi_sector = blocks[0] << (blkbits - 9);
bio->bi_end_io = mpage_end_io;
bio->bi_private = ctx;
- bio_set_op_attrs(bio, REQ_OP_READ, 0);
+ bio_set_op_attrs(bio, REQ_OP_READ,
+ is_readahead ? REQ_RAHEAD : 0);
}
length = first_hole << blkbits;
--
2.7.4
next prev parent reply other threads:[~2018-05-30 14:42 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-30 14:42 [PATCHSET v3 0/4] Submit ->readpages() IO as read-ahead Jens Axboe
2018-05-30 14:42 ` [PATCH 1/4] mpage: add argument structure for do_mpage_readpage() Jens Axboe
2018-05-30 14:42 ` [PATCH 2/4] mpage: mpage_readpages() should submit IO as read-ahead Jens Axboe
2018-05-30 14:42 ` [PATCH 3/4] btrfs: readpages() " Jens Axboe
2018-05-30 14:42 ` Jens Axboe [this message]
2018-06-19 23:56 ` [PATCHSET v3 0/4] Submit ->readpages() " Andrew Morton
2018-06-20 14:07 ` Jens Axboe
2018-06-20 19:58 ` Andrew Morton
2018-06-20 20:15 ` Chris Mason
2018-06-20 22:28 ` Jens Axboe
2018-06-20 23:23 ` Andrew Morton
2018-06-20 23:33 ` Jens Axboe
2018-06-20 23:45 ` Andrew Morton
2018-06-21 0:06 ` Jens Axboe
2018-06-21 12:21 ` Christoph Hellwig
2018-06-21 13:52 ` Jens Axboe
-- strict thread matches above, loose matches on Subject: below --
2018-06-21 1:07 [PATCH v4 " Jens Axboe
2018-06-21 1:07 ` [PATCH 4/4] ext4: readpages() should submit " Jens Axboe
2018-05-29 22:17 [PATCHSET v2 0/4] Submit ->readpages() " Jens Axboe
2018-05-29 22:17 ` [PATCH 4/4] ext4: readpages() should submit " Jens Axboe
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