On Mon, Oct 23, 2017 at 07:10:07PM -0600, Greg Edwards wrote:
> guard_bio_eod() needs to look at the partition capacity, not just the
> capacity of the whole device, when determining if truncation is
> necessary.
>
> [ 60.268688] attempt to access beyond end of device
> [ 60.268690] unknown-block(9,1): rw=0, want=67103509, limit=67103506
> [ 60.268693] buffer_io_error: 2 callbacks suppressed
> [ 60.268696] Buffer I/O error on dev md1p7, logical block 4524305, async
> page read
>
> Fixes: 74d46992e0d9 ("block: replace bi_bdev with a gendisk pointer and
> partitions index")
> Signed-off-by: Greg Edwards <[email protected]>
That smells like a nasty source of overhead, especially on SMP boxen...
