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| author | Jeff Moyer <jmoyer@redhat.com> | 2009-04-22 14:08:13 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-04-28 07:37:33 +0200 |
| commit | db2dbb12dc47a50c7a4c5678f526014063e486f6 (patch) | |
| tree | 8bfa3fe41e674f584eb37a7767c008d609b41d75 /fs | |
| parent | block: enable by default support for large devices and files on 32-bit archs (diff) | |
| download | linux-db2dbb12dc47a50c7a4c5678f526014063e486f6.tar.xz linux-db2dbb12dc47a50c7a4c5678f526014063e486f6.zip | |
block: implement blkdev_readpages
Doing a proper block dev ->readpages() speeds up the crazy dump(8)
approach of using interleaved process IO.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/block_dev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index f45dbc18dd17..a85fe310fc6f 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -331,6 +331,12 @@ static int blkdev_readpage(struct file * file, struct page * page) return block_read_full_page(page, blkdev_get_block); } +static int blkdev_readpages(struct file *file, struct address_space *mapping, + struct list_head *pages, unsigned nr_pages) +{ + return mpage_readpages(mapping, pages, nr_pages, blkdev_get_block); +} + static int blkdev_write_begin(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata) @@ -1399,6 +1405,7 @@ static int blkdev_releasepage(struct page *page, gfp_t wait) static const struct address_space_operations def_blk_aops = { .readpage = blkdev_readpage, + .readpages = blkdev_readpages, .writepage = blkdev_writepage, .sync_page = block_sync_page, .write_begin = blkdev_write_begin, |