Hi Neil,
> On Sep 9, 2019, at 7:57 AM, NeilBrown <neilb@xxxxxxx> wrote:
>
>
> If the drives in a RAID0 are not all the same size, the array is
> divided into zones.
> The first zone covers all drives, to the size of the smallest.
> The second zone covers all drives larger than the smallest, up to
> the size of the second smallest - etc.
>
> A change in Linux 3.14 unintentionally changed the layout for the
> second and subsequent zones. All the correct data is still stored, but
> each chunk may be assigned to a different device than in pre-3.14 kernels.
> This can lead to data corruption.
>
> It is not possible to determine what layout to use - it depends which
> kernel the data was written by.
> So we add a module parameter to allow the old (0) or new (1) layout to be
> specified, and refused to assemble an affected array if that parameter is
> not set.
>
> Fixes: 20d0189b1012 ("block: Introduce new bio_split()")
> cc: stable@xxxxxxxxxxxxxxx (3.14+)
> Signed-off-by: NeilBrown <neilb@xxxxxxx>
Thanks for the patches. They look great. However, I am having problem
apply them (not sure whether it is a problem on my side). Could you
please push it somewhere so I can use cherry-pick instead?
Thanks,
Song
