diff options
Diffstat (limited to 'mm/readahead.c')
| -rw-r--r-- | mm/readahead.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/mm/readahead.c b/mm/readahead.c index 77506a2..2c0cc48 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -109,9 +109,12 @@ EXPORT_SYMBOL(read_cache_pages); static int read_pages(struct address_space *mapping, struct file *filp, struct list_head *pages, unsigned nr_pages) { + struct blk_plug plug; unsigned page_idx; int ret; + blk_start_plug(&plug); + if (mapping->a_ops->readpages) { ret = mapping->a_ops->readpages(filp, mapping, pages, nr_pages); /* Clean up the remaining pages */ @@ -129,7 +132,10 @@ static int read_pages(struct address_space *mapping, struct file *filp, page_cache_release(page); } ret = 0; + out: + blk_finish_plug(&plug); + return ret; } @@ -554,17 +560,5 @@ page_cache_async_readahead(struct address_space *mapping, /* do read-ahead */ ondemand_readahead(mapping, ra, filp, true, offset, req_size); - -#ifdef CONFIG_BLOCK - /* - * Normally the current page is !uptodate and lock_page() will be - * immediately called to implicitly unplug the device. However this - * is not always true for RAID conifgurations, where data arrives - * not strictly in their submission order. In this case we need to - * explicitly kick off the IO. - */ - if (PageUptodate(page)) - blk_run_backing_dev(mapping->backing_dev_info, NULL); -#endif } EXPORT_SYMBOL_GPL(page_cache_async_readahead); |
