erofs: enable large folios for fscache mode

Enable large folios for fscache mode.  Enable this feature for
non-compressed format for now, until the compression part supports large
folios later.

One thing worth noting is that, the feature is not enabled for the meta
data routine since meta inodes don't need large folios for now, nor do
they support readahead yet.

Also document this new feature.

Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Jia Zhu <zhujia.zj@bytedance.com>
Link: https://lore.kernel.org/r/20221201074256.16639-3-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

diff --git a/Documentation/filesystems/erofs.rst b/Documentation/filesystems/erofs.rst
index a2fdbd4f0e33dd02f4846746596e5886dc234ef0..067fd1670b1f1d6937d214f33309c4fc55e29923 100644 (file)
--- a/Documentation/filesystems/erofs.rst
+++ b/Documentation/filesystems/erofs.rst
@@ -73,6 +73,8 @@ Here are the main features of EROFS:
 
  - Support merging tail-end data into a special inode as fragments.
 
+ - Support large folios for uncompressed files.
+
  - Support direct I/O on uncompressed files to avoid double caching for loop
    devices;
 

diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index e457b8a59ee7c257f6546a62206309b49a96cd96..85932086d23ff0f45d221e08a438509029cecc4d 100644 (file)
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -295,8 +295,7 @@ 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);
+       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;