[PATCH 05/12] mm/filemap: use page_cache_sync_ra() to kick off read-ahead

Jens Axboe
2024-12-03T15:32:53Z

Rather than use the page_cache_sync_readahead() helper, define our own
ractl and use page_cache_sync_ra() directly. In preparation for needing
to modify ractl inside filemap_get_pages().

No functional changes in this patch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
mm/filemap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 898e992039e8..dd3042de8038 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2527,7 +2527,6 @@ static int filemap_get_pages(struct kiocb *iocb, size_t count,
{
struct file *filp = iocb->ki_filp;
struct address_space *mapping = filp->f_mapping;
- struct file_ra_state *ra = &filp->f_ra;
pgoff_t index = iocb->ki_pos >> PAGE_SHIFT;
pgoff_t last_index;
struct folio *folio;
@@ -2542,12 +2541,13 @@ static int filemap_get_pages(struct kiocb *iocb, size_t count,

filemap_get_read_batch(mapping, index, last_index - 1, fbatch);
if (!folio_batch_count(fbatch)) {
+ DEFINE_READAHEAD(ractl, filp, &filp->f_ra, mapping, index);
+
if (iocb->ki_flags & IOCB_NOIO)
return -EAGAIN;
if (iocb->ki_flags & IOCB_NOWAIT)
flags = memalloc_noio_save();
- page_cache_sync_readahead(mapping, ra, filp, index,
- last_index - index);
+ page_cache_sync_ra(&ractl, last_index - index);
if (iocb->ki_flags & IOCB_NOWAIT)
memalloc_noio_restore(flags);
filemap_get_read_batch(mapping, index, last_index - 1, fbatch);
--
2.45.2