Re: [PATCH v4 6/8] md/r5cache: sysfs entry r5c_state

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> On Oct 12, 2016, at 9:56 AM, Shaohua Li <shli@xxxxxxxxxx> wrote:
> 
>> 
> 
> This isn't how sysfs entry is supposed to output. You can either show the value
> or the string, not both with format. I'd prefer the string though, and make
> store accept string.

I implemented something like the following:

root@virt-test:~/md# cat /sys/block/md0/md/r5c_state
[write-through] write-back
root@virt-test:~/md# echo write-back > /sys/block/md0/md/r5c_state
root@virt-test:~/md# cat /sys/block/md0/md/r5c_state
write-through [write-back]

root@virt-test:~/md# ./mdadm --fail /dev/md0 /dev/loop4
mdadm: set /dev/loop4 faulty in /dev/md0
root@virt-test:~/md# cat /sys/block/md0/md/r5c_state
no-cache [cache-broken]
root@virt-test:~/md# echo no-cache > /sys/block/md0/md/r5c_state
root@virt-test:~/md# cat /sys/block/md0/md/r5c_state
no-cache

It will be part of next version. 

Thanks,
Song--
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