On 3/3/21 8:46 AM, Anthony Iliopoulos wrote:
> On Tue, Mar 02, 2021 at 03:36:19PM -0700, Jens Axboe wrote:
>> We're not factoring in the start of the file for where to write and
>> read the swapfile, which leads to very unfortunate side effects of
>> writing where we should not be...
>>
>> Fixes: 48d15436fde6 ("mm: remove get_swap_bio")
>
> Presumably the usage of swap_page_sector was already affecting swap on
> blockdevs that implement rw_page (currently brd, zram, btt, pmem), so it
> may worth adding:
>
> Fixes: dd6bd0d9c7db ("swap: use bdev_read_page() / bdev_write_page()")
> Cc: <stable@xxxxxxxxxxxxxxx> # v3.16+
>
> for backporting, since it also affects stable.
yes indeed, in fact that is the source of the original issue (copy/paste
from that broken path).
Fix is already upstream, but would be nice if someone would turn it into
something that could be applied to stable.
--
Jens Axboe
