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ext4,f2fs: fix readahead of verity data

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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: 73bb49da50 ("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>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-10-12 20:34:19 +01:00 • committed by Andrew Morton
parent deb0f65628
commit 4fa0e3ff21
2 changed files with 4 additions and 2 deletions
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3
fs/ext4/verity.c
View file

@ -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)

3
fs/f2fs/verity.c
View file

@ -262,13 +262,14 @@ static struct page *f2fs_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 += f2fs_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)