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Subject: Re: Linux 5.10
To:     Mike Snitzer <snitzer@redhat.com>,
        Greg KH <gregkh@linuxfoundation.org>
Cc:     Dave Jones <davej@codemonkey.org.uk>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-block@vger.kernel.org, dm-devel@redhat.com
References: <CAHk-=whCKhxNyKn1Arut8xUDKTwp3fWcCj_jbL5dbzkUmo45gQ@mail.gmail.com>
 <20201214053147.GA24093@codemonkey.org.uk> <X9b9ujh5T6U5+aBY@kroah.com>
 <20201214160247.GA2090@redhat.com> <20201214162631.GA2290@redhat.com>
From:   Jens Axboe <axboe@kernel.dk>
Message-ID: <6522caad-bfe8-2554-2ba9-dff5856233d1@kernel.dk>
Date:   Mon, 14 Dec 2020 10:21:59 -0700
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On 12/14/20 9:26 AM, Mike Snitzer wrote:
> On Mon, Dec 14 2020 at 11:02am -0500,
> Mike Snitzer <snitzer@redhat.com> wrote:
> 
>> On Mon, Dec 14 2020 at 12:52am -0500,
>> Greg KH <gregkh@linuxfoundation.org> wrote:
>>
>>> On Mon, Dec 14, 2020 at 12:31:47AM -0500, Dave Jones wrote:
>>>> On Sun, Dec 13, 2020 at 03:03:29PM -0800, Linus Torvalds wrote:
>>>>  > Ok, here it is - 5.10 is tagged and pushed out.
>>>>  > 
>>>>  > I pretty much always wish that the last week was even calmer than it
>>>>  > was, and that's true here too. There's a fair amount of fixes in here,
>>>>  > including a few last-minute reverts for things that didn't get fixed,
>>>>  > but nothing makes me go "we need another week".
>>>>
>>>> ...
>>>>
>>>>  > Mike Snitzer (1):
>>>>  >       md: change mddev 'chunk_sectors' from int to unsigned
>>>>
>>>> Seems to be broken.  This breaks mounting my raid6 partition:
>>>>
>>>> [   87.290698] attempt to access beyond end of device
>>>>                md0: rw=4096, want=13996467328, limit=6261202944
>>>> [   87.293371] attempt to access beyond end of device
>>>>                md0: rw=4096, want=13998564480, limit=6261202944
>>>> [   87.296045] BTRFS warning (device md0): couldn't read tree root
>>>> [   87.300056] BTRFS error (device md0): open_ctree failed
>>>>
>>>> Reverting it goes back to the -rc7 behaviour where it mounts fine.
>>>
>>> If the developer/maintainer(s) agree, I can revert this and push out a
>>> 5.10.1, just let me know.
>>
>> Yes, these should be reverted from 5.10 via 5.10.1:
>>
>> e0910c8e4f87 dm raid: fix discard limits for raid1 and raid10
>> f075cfb1dc59 md: change mddev 'chunk_sectors' from int to unsigned
> 
> Sorry, f075cfb1dc59 was my local commit id, the corresponding upstream
> commit as staged by Jens is:
> 
> 6ffeb1c3f82 md: change mddev 'chunk_sectors' from int to unsigned
> 
> So please revert:
> 6ffeb1c3f822 md: change mddev 'chunk_sectors' from int to unsigned
> and then revert:
> e0910c8e4f87 dm raid: fix discard limits for raid1 and raid10

Working with Song on understanding the failure case here. raid6 was
tested prior to this being shipped. We'll be back with more soon...

-- 
Jens Axboe