Re: [PATCH] nvme/012 & 013: avoid extremely slow xfs IO

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On 4/14/19 7:01 PM, Chaitanya Kulkarni wrote:
> Thanks for the patch Ming. Couple of comments below.
> On 4/14/19 6:22 PM, Ming Lei wrote:
>> It is observed that nvme/012 may take ~17 minutes to complete on aarch64,
>> even worse it may trigger IO timeout on nvme-loop.
>>
>> Eric and Dave replied that it is because of too small log size on small
>> disk.
>>
>> So pass '-l size=32m' to avoid the issue.
>>
>> With this patch, nvme/012 can be completed in one minute.
>>
> Then we should set the QUICK=1 if its taking shorter time.
> 
>> Cc: Eric Sandeen <esandeen@xxxxxxxxxx>
>> Cc: Dave Chinner <dchinner@xxxxxxxxxx>
>> Cc: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>
>> Cc: linux-xfs@xxxxxxxxxxxxxxx
>> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
>> ---
>>    tests/nvme/012 | 2 +-
>>    tests/nvme/013 | 2 +-
>>    2 files changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/tests/nvme/012 b/tests/nvme/012
>> index 9a6801511df7..d7a8751ec752 100755
>> --- a/tests/nvme/012
>> +++ b/tests/nvme/012
>> @@ -46,7 +46,7 @@ test() {
>>    
>>    	umount ${mount_dir} > /dev/null 2>&1
>>    
>> -	mkfs.xfs -f /dev/"${nvmedev}n1" > /dev/null 2>&1
>> +	mkfs.xfs -l size=32m -f /dev/"${nvmedev}n1" > /dev/null 2>&1
>>    
> As a part of this series lets move this to the helper mkfs in the
> nvme/rc and use that call in all the file-backed ns related testcases.
> Let me know if you want me to do that or you want me to do that as a
> part of this series. I'm okay with anything.
>>    	mount /dev/"${nvmedev}n1" "${mount_dir}"
>>    
>> diff --git a/tests/nvme/013 b/tests/nvme/013
>> index e346cd4baa35..bc435f752dca 100755
>> --- a/tests/nvme/013
>> +++ b/tests/nvme/013
>> @@ -44,7 +44,7 @@ test() {
>>    
>>    	umount ${mount_dir} > /dev/null 2>&1
>>    
>> -	mkfs.xfs -f /dev/"${nvmedev}n1" > /dev/null 2>&1
>> +	mkfs.xfs -l size=32m  -f /dev/"${nvmedev}n1" > /dev/null 2>&1
>>    
> Extra space here but can be ignored once we move mkfs to the helper call.
>>    	mount /dev/"${nvmedev}n1" "${mount_dir}"
>>    
>>
> 
> 





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