summaryrefslogtreecommitdiff
path: root/mm/readahead.c
diff options
context:
space:
mode:
authorDavid Howells <dhowells@redhat.com>2020-10-16 06:06:24 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-16 21:11:16 +0300
commit7b3df3b9ac7e807bf1b6fcc03077bd80068f3d3c (patch)
tree04a4b6ada15f6e5cb28f9dae0fbaa6458c3ab6d4 /mm/readahead.c
parent6e4af69ae9b7ca1bc2f82d3bf061ef8abedeabc4 (diff)
downloadlinux-7b3df3b9ac7e807bf1b6fcc03077bd80068f3d3c.tar.xz
mm/readahead: pass readahead_control to force_page_cache_ra
Reimplement force_page_cache_readahead() as a wrapper around force_page_cache_ra(). Pass the existing readahead_control from page_cache_sync_readahead(). Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Eric Biggers <ebiggers@google.com> Link: https://lkml.kernel.org/r/20200903140844.14194-7-willy@infradead.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/readahead.c')
-rw-r--r--mm/readahead.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 73110c4148f8..3115ced5faae 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -271,13 +271,13 @@ void do_page_cache_ra(struct readahead_control *ractl,
* Chunk the readahead into 2 megabyte units, so that we don't pin too much
* memory at once.
*/
-void force_page_cache_readahead(struct address_space *mapping,
- struct file *file, pgoff_t index, unsigned long nr_to_read)
+void force_page_cache_ra(struct readahead_control *ractl,
+ unsigned long nr_to_read)
{
- DEFINE_READAHEAD(ractl, file, mapping, index);
+ struct address_space *mapping = ractl->mapping;
struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
- struct file_ra_state *ra = &file->f_ra;
- unsigned long max_pages;
+ struct file_ra_state *ra = &ractl->file->f_ra;
+ unsigned long max_pages, index;
if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages &&
!mapping->a_ops->readahead))
@@ -287,14 +287,16 @@ void force_page_cache_readahead(struct address_space *mapping,
* If the request exceeds the readahead window, allow the read to
* be up to the optimal hardware IO size
*/
+ index = readahead_index(ractl);
max_pages = max_t(unsigned long, bdi->io_pages, ra->ra_pages);
- nr_to_read = min(nr_to_read, max_pages);
+ nr_to_read = min_t(unsigned long, nr_to_read, max_pages);
while (nr_to_read) {
unsigned long this_chunk = (2 * 1024 * 1024) / PAGE_SIZE;
if (this_chunk > nr_to_read)
this_chunk = nr_to_read;
- do_page_cache_ra(&ractl, this_chunk, 0);
+ ractl->_index = index;
+ do_page_cache_ra(ractl, this_chunk, 0);
index += this_chunk;
nr_to_read -= this_chunk;
@@ -576,7 +578,7 @@ void page_cache_sync_readahead(struct address_space *mapping,
/* be dumb */
if (filp && (filp->f_mode & FMODE_RANDOM)) {
- force_page_cache_readahead(mapping, filp, index, req_count);
+ force_page_cache_ra(&ractl, req_count);
return;
}