Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
fs/ntfs3: zero-fill folios beyond i_valid in ntfs_read_folio()
Handle ntfs_read_folio() early when the folio offset is beyond i_valid
by zero-filling the folio and marking it uptodate. This avoids needless
I/O and locking, improves read performance.
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
+13
+13
fs/ntfs3/inode.c
+13
fs/ntfs3/inode.c
···
723
723
struct address_space *mapping = folio->mapping;
724
724
struct inode *inode = mapping->host;
725
725
struct ntfs_inode *ni = ntfs_i(inode);
726
+
loff_t vbo = folio_pos(folio);
727
+
728
+
if (unlikely(is_bad_ni(ni))) {
729
+
folio_unlock(folio);
730
+
return -EIO;
731
+
}
732
+
733
+
if (ni->i_valid <= vbo) {
734
+
folio_zero_range(folio, 0, folio_size(folio));
735
+
folio_mark_uptodate(folio);
736
+
folio_unlock(folio);
737
+
return 0;
738
+
}
726
739
727
740
if (is_resident(ni)) {
728
741
ni_lock(ni);