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authorDan Williams <dan.j.williams@intel.com>2017-12-22 05:18:27 +0300
committerDan Williams <dan.j.williams@intel.com>2018-01-20 03:50:53 +0300
commitb4b5798cea8f40ab61f3a2c79a26314465dd83e3 (patch)
tree6af0b815e7de22664f6807867cc0f25c8c7ce0d8 /fs/ext2
parent24f3478d664b1eaa6f8860d3aa521aebe51b2a62 (diff)
downloadlinux-b4b5798cea8f40ab61f3a2c79a26314465dd83e3.tar.xz
ext2: auto disable dax instead of failing mount
Bring the ext2 filesystem in line with xfs that only warns and continues when the "-o dax" option is specified to mount and the backing device does not support dax. This is in preparation for removing dax support from devices that do not enable get_user_pages() operations on dax mappings. In other words 'gup' support is required and configurations that were using so called 'page-less' dax will be converted back to using the page cache. Removing the broken 'page-less' dax support is a pre-requisite for removing the "EXPERIMENTAL" warning when mounting a filesystem in dax mode. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/ext2')
-rw-r--r--fs/ext2/super.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 7646818ab266..38f9222606ee 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -959,8 +959,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
err = bdev_dax_supported(sb, blocksize);
- if (err)
- goto failed_mount;
+ if (err) {
+ ext2_msg(sb, KERN_ERR,
+ "DAX unsupported by block device. Turning off DAX.");
+ sbi->s_mount_opt &= ~EXT2_MOUNT_DAX;
+ }
}
/* If the blocksize doesn't match, re-read the thing.. */