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authorXin Yin <yinxin.x@bytedance.com>2023-07-11 14:21:30 +0800
committerGao Xiang <hsiangkao@linux.alibaba.com>2023-07-12 00:50:56 +0800
commit18bddc5b67038722cb88fcf51fbf41a0277092cb (patch)
tree332b9e95900a18f382a030b0aa672b30ad7a877e /fs/erofs
parent8191213a5835b0317c5e4d0d337ae1ae00c75253 (diff)
erofs: fix fsdax unavailability for chunk-based regular files
DAX can be used to share page cache between VMs, reducing guest memory overhead. And chunk based data format is widely used for VM and container image. So enable dax support for it, make erofs better used for VM scenarios. Fixes: c5aa903a59db ("erofs: support reading chunk-based uncompressed files") Signed-off-by: Xin Yin <yinxin.x@bytedance.com> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Chao Yu <chao@kernel.org> Link: https://lore.kernel.org/r/20230711062130.7860-1-yinxin.x@bytedance.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs')
-rw-r--r--fs/erofs/inode.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index d70b12b81507..e12592727a54 100644
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -183,7 +183,8 @@ static void *erofs_read_inode(struct erofs_buf *buf,
inode->i_flags &= ~S_DAX;
if (test_opt(&sbi->opt, DAX_ALWAYS) && S_ISREG(inode->i_mode) &&
- vi->datalayout == EROFS_INODE_FLAT_PLAIN)
+ (vi->datalayout == EROFS_INODE_FLAT_PLAIN ||
+ vi->datalayout == EROFS_INODE_CHUNK_BASED))
inode->i_flags |= S_DAX;
if (!nblks)