[dm-devel] [PATCH v2 1/2] md raid0/linear: Introduce new array state 'broken'
Song Liu
songliubraving at fb.com
Mon Aug 19 21:57:11 UTC 2019
> On Aug 19, 2019, at 12:11 PM, Guilherme G. Piccoli <gpiccoli at canonical.com> wrote:
>
> On 19/08/2019 15:57, Song Liu wrote:
>> [...]
>>
>> I was thinking, if we can set MD_BROKEN when the device fails, we can
>> just test MD_BROKEN in array_state_show() (instead of iterating through
>> all devices).
>>
>> Would this work?
>>
>> Thanks,
>> Song
>>
>
> This could work, but will require some refactors; it'll simplify the
> check for a healthy array (no need for is_missing_dev() function) but
> will complicate the criteria to clear MD_BROKEN and the detection of
> more members failing (we would stop the detection after the 1st failure
> if we only test MD_BROKEN).
>
> We will always need to test the GENHD_FL_UP in some code path, to be
> able to show users device recovered from a failure.
> Where do you suggest to test this flag?
How about we test this when we do clear_bit(Faulty..)? And maybe also in
add_new_disk()?
Thanks,
Song
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