erofs: enable large folios for iomap mode

Enable large folios for iomap mode.  Then the readahead routine will
pass down large folios containing multiple pages.

Let's enable this for non-compressed format for now, until the
compression part supports large folios later.

When large folios supported, the iomap routine will allocate iomap_page
for each large folio and thus we need iomap_release_folio() and
iomap_invalidate_folio() to free iomap_page when these folios get
reclaimed or invalidated.

Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20221130060455.44532-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index fe8ac0e163f7ebf85e81c3b275e45b333b0efb17..c9526c627dda3d7b457b7c023b93e4c777890203 100644 (file)
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -403,6 +403,8 @@ const struct address_space_operations erofs_raw_access_aops = {
        .readahead = erofs_readahead,
        .bmap = erofs_bmap,
        .direct_IO = noop_direct_IO,
+       .release_folio = iomap_release_folio,
+       .invalidate_folio = iomap_invalidate_folio,
 };
 
 #ifdef CONFIG_FS_DAX

diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index ad2a82f2eb4cdd0084ef659d1f6522a8a5cc2258..e457b8a59ee7c257f6546a62206309b49a96cd96 100644 (file)
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -295,6 +295,8 @@ static int erofs_fill_inode(struct inode *inode)
                goto out_unlock;
        }
        inode->i_mapping->a_ops = &erofs_raw_access_aops;
+       if (!erofs_is_fscache_mode(inode->i_sb))
+               mapping_set_large_folios(inode->i_mapping);
 #ifdef CONFIG_EROFS_FS_ONDEMAND
        if (erofs_is_fscache_mode(inode->i_sb))
                inode->i_mapping->a_ops = &erofs_fscache_access_aops;