Re: [GIT PULL] Core block IO bits for 4.2

[Jens Axboe]

On 06/26/2015 12:15 AM, Junichi Nomura wrote:
> Hi Jens,
> 
> On 06/25/15 23:37, Jens Axboe wrote:
>>        block, dm: don't copy bios for request clones
> 
> this change should not be pushed to mainline yet.
> 
> Firstly, Christoph has a newer version of the patch that fixes silent
> data corruption problem:
>    https://www.redhat.com/archives/dm-devel/2015-May/msg00229.html
> 
> And the new version still depends on LLDDs to always complete requests
> to the end when error happens, while block API doesn't enforce such a
> requirement. If the assumption is ever broken, the inconsistency between
> request and bio (e.g. rq->__sector and rq->bio) will cause silent data
> corruption:
>    https://www.redhat.com/archives/dm-devel/2015-June/msg00022.html

Why was none of that sent to the block tree?

In any case, Linus, pick up Mike's pull request to fix this up.

-- 
Jens Axboe

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/