From: Bill O'Donnell <bodonnel@xxxxxxxxxx>
[fs] dax: mark tech preview
Bugzilla: 1995338
Upstream Status: RHEL only
Tested: Local xfstests on ext4 and xfs with and without dax
Make sure to taint the kernel with TAINT_TECH_PREVIEW when a file
system is mounted with "-o dax".
Signed-off-by: Bill O'Donnell <bodonnel@xxxxxxxxxx>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index blahblah..blahblah 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4439,6 +4439,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags);
if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) {
+ static bool printed = false;
if (ext4_has_feature_inline_data(sb)) {
ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem"
" that may contain inline data");
@@ -4449,6 +4450,10 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
"DAX unsupported by block device.");
goto failed_mount;
}
+ if (!printed) {
+ mark_tech_preview("ext4 direct access (dax)", NULL);
+ printed = true;
+ }
}
if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) {
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index blahblah..blahblah 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1545,6 +1545,7 @@ xfs_fs_fill_super(
if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) {
bool rtdev_is_dax = false, datadev_is_dax;
+ static bool printed = false;
xfs_warn(mp,
"DAX enabled. Warning: EXPERIMENTAL, use at your own risk");
@@ -1565,6 +1566,10 @@ xfs_fs_fill_super(
error = -EINVAL;
goto out_filestream_unmount;
}
+ if (!printed) {
+ mark_tech_preview("xfs direct access (dax)", NULL);
+ printed = true;
+ }
}
if (mp->m_flags & XFS_MOUNT_DISCARD) {
--
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/1319
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