diff mbox series

[v4,23/27] btrfs: disallow inode_cache in HMZONED mode

Message ID 20190823101036.796932-24-naohiro.aota@wdc.com (mailing list archive)
State New, archived
Headers show
Series btrfs zoned block device support | expand

Commit Message

Naohiro Aota Aug. 23, 2019, 10:10 a.m. UTC 
inode_cache use pre-allocation to write its cache data. However,
pre-allocation is completely disabled in HMZONED mode.

We can technically enable inode_cache in the same way as relocation.
However, inode_cache is rarely used and the man page discourage using it.
So, let's just disable it for now.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 fs/btrfs/hmzoned.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/fs/btrfs/hmzoned.c b/fs/btrfs/hmzoned.c
index 871befbbb23b..f8f41cb3d22a 100644
--- a/fs/btrfs/hmzoned.c
+++ b/fs/btrfs/hmzoned.c
@@ -272,6 +272,12 @@  int btrfs_check_mountopts_hmzoned(struct btrfs_fs_info *info)
 		return -EINVAL;
 	}
 
+	if (btrfs_test_pending(info, SET_INODE_MAP_CACHE)) {
+		btrfs_err(info,
+		  "cannot enable inode map caching with HMZONED mode");
+		return -EINVAL;
+	}
+
 	return 0;
 }