diff options
Diffstat (limited to 'debian/patches/debian/btrfs-warn-about-raid5-6-being-experimental-at-mount.patch')
| -rw-r--r-- | debian/patches/debian/btrfs-warn-about-raid5-6-being-experimental-at-mount.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/debian/patches/debian/btrfs-warn-about-raid5-6-being-experimental-at-mount.patch b/debian/patches/debian/btrfs-warn-about-raid5-6-being-experimental-at-mount.patch new file mode 100644 index 000000000..abc4cc2bd --- /dev/null +++ b/debian/patches/debian/btrfs-warn-about-raid5-6-being-experimental-at-mount.patch @@ -0,0 +1,37 @@ +From: Adam Borowski <kilobyte@angband.pl> +Date: Tue, 28 Mar 2017 16:55:05 +0200 +Subject: btrfs: warn about RAID5/6 being experimental at mount time +Bug-Debian: https://bugs.debian.org/863290 +Origin: https://bugs.debian.org/863290#5 + +Too many people come complaining about losing their data -- and indeed, +there's no warning outside a wiki and the mailing list tribal knowledge. +Message severity chosen for consistency with XFS -- "alert" makes dmesg +produce nice red background which should get the point across. + +Signed-off-by: Adam Borowski <kilobyte@angband.pl> +[bwh: Also add_taint() so this is flagged in bug reports] +[2023-01-10: still accurate according to btrfs-progs own manpage: +https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git/commit/?id=922797e15590b836e377d6dc47b828356cafc2a9] +--- + fs/btrfs/disk-io.c | 8 ++++++++ + 1 file changed, 8 insertions(+) + +--- a/fs/btrfs/disk-io.c ++++ b/fs/btrfs/disk-io.c +@@ -3832,6 +3832,15 @@ int __cold open_ctree(struct super_block *sb, + btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations"); + } + ++ if ((fs_info->avail_data_alloc_bits | ++ fs_info->avail_metadata_alloc_bits | ++ fs_info->avail_system_alloc_bits) & ++ BTRFS_BLOCK_GROUP_RAID56_MASK) { ++ btrfs_alert(fs_info, ++ "btrfs RAID5/6 is EXPERIMENTAL and has known data-loss bugs"); ++ add_taint(TAINT_AUX, LOCKDEP_STILL_OK); ++ } ++ + /* + * For devices supporting discard turn on discard=async automatically, + * unless it's already set or disabled. This could be turned off by |