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authorMatthew Wilcox (Oracle)2022-10-12 20:34:19 +0100
committerAndrew Morton2022-10-12 18:51:48 -0700
commit4fa0e3ff217f775cb58d2d6d51820ec519243fb9 (patch)
tree93e0a3d208bdf1f845ecb8933484988b3a4f4b07 /fs/ext4
parentdeb0f6562884b5b4beb883d73e66a7d3a1b96d99 (diff)
ext4,f2fs: fix readahead of verity data
The recent change of page_cache_ra_unbounded() arguments was buggy in the two callers, causing us to readahead the wrong pages. Move the definition of ractl down to after the index is set correctly. This affected performance on configurations that use fs-verity. Link: https://lkml.kernel.org/r/20221012193419.1453558-1-willy@infradead.org Fixes: 73bb49da50cd ("mm/readahead: make page_cache_ra_unbounded take a readahead_control") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reported-by: Jintao Yin <nicememory@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/verity.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
index b051d19b5c8a..94442c690ca7 100644
--- a/fs/ext4/verity.c
+++ b/fs/ext4/verity.c
@@ -365,13 +365,14 @@ static struct page *ext4_read_merkle_tree_page(struct inode *inode,
pgoff_t index,
unsigned long num_ra_pages)
{
- DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, index);
struct page *page;
index += ext4_verity_metadata_pos(inode) >> PAGE_SHIFT;
page = find_get_page_flags(inode->i_mapping, index, FGP_ACCESSED);
if (!page || !PageUptodate(page)) {
+ DEFINE_READAHEAD(ractl, NULL, NULL, inode->i_mapping, index);
+
if (page)
put_page(page);
else if (num_ra_pages > 1)