Re: [dm-devel] [PATCH] dm-raid: check events in super_validate

[Nate Dailey <nate.dailey@stratus.com>]

Interesting. I had tried this with the latest stable kernel.org kernel 
(as of a month or so ago) and still hit it.

I'll mention that the initial resync on creating the raid1 can be 
interrupted okay; the problem only happens after that completes, and a 
disk is removed and re-added.

Nate



On 02/26/2014 05:21 PM, Brassow Jonathan wrote:
> On Feb 25, 2014, at 4:59 PM, Brassow Jonathan wrote:
>
>> On Feb 25, 2014, at 4:22 PM, Nate Dailey wrote:
>>
>>> Here's what I've done to reproduce this:
>>>
>>> - remove a disk containing one leg of an LVM raid1 mirror
>>> - do enough IO that a lengthy recovery will be required
>>> - insert the removed disk
>>> - let recovery begin, but deactivate the LV before it completes
>>> - activate the LV
>>>
>>> This is the point where the recovery should start back up, but it doesn't. I haven't tried this in a few weeks, but am happy to try it again if it would help.
>> Confirmed (test output below).  I'll get started on this.  This code can be a bit tricky and I've been away from it for a while.  It will take me a bit to re-familiarize myself with it and review your patch.
> I've tested this again with the latest code from upstream (kernel 3.14.0-rc4) and I cannot reproduce the problem there.  I'll see if I can find the last non-working version...
>
>   brassow
>