diff options
| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2015-07-22 12:09:17 -0500 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-07-23 09:22:00 +1000 |
| commit | d3b178adb3a3adf54ecf77758138b654c3ee7f09 (patch) | |
| tree | 018d2ba212c10f10a6e3bbfcd3d2197918805017 /Documentation/ide/ChangeLog.ide-floppy.1996-2002 | |
| parent | ee5d004fd0591536a061451eba2b187092e9127c (diff) | |
md: Skip cluster setup for dm-raid
There is a bug that the bitmap superblock isn't initialised properly for
dm-raid, so a new field can have garbage in new fields.
(dm-raid does initialisation in the kernel - md initialised the
superblock in mdadm).
This means that for dm-raid we cannot currently trust the new ->nodes
field. So:
- use __GFP_ZERO to initialise the superblock properly for all new
arrays
- initialise all fields in bitmap_info in bitmap_new_disk_sb
- ignore ->nodes for dm arrays (yes, this is a hack)
This bug exposes dm-raid to bug in the (still experimental) md-cluster
code, so it is suitable for -stable. It does cause crashes.
References: https://bugzilla.kernel.org/show_bug.cgi?id=100491
Cc: stable@vger.kernel.org (v4.1)
Signed-off-By: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'Documentation/ide/ChangeLog.ide-floppy.1996-2002')
0 files changed, 0 insertions, 0 deletions