Re: [PATCH 2/2] refscale: prevent buffer to pr_alert() being too long

["lizhijian@fujitsu.com" <lizhijian@fujitsu.com>]

On 25/10/2021 06:56, Paul E. McKenney wrote:
>
>>>>    	if (!buf)
>>>>    		return 0;
>>>>    	buf[0] = 0;
>>>> @@ -617,13 +617,15 @@ static u64 process_durations(int n)
>>>>    		if (i % 5 == 0)
>>>>    			strcat(buf, "\n");
>>>> +		if (strlen(buf) > 800) {
>>>> +			pr_alert("%s", buf);
>>> Does the tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh
>>> script also require changes to handle the partial lines?
Looks it doesn't matter for kvm-recheck-refscale.sh where it will not check these output.


>>>>    		u32 rem;
>>>> @@ -712,9 +711,13 @@ static int main_func(void *arg)
>>>>    		avg = div_u64_rem(result_avg[exp], 1000, &rem);
>>>>    		sprintf(buf1, "%d\t%llu.%03u\n", exp + 1, avg, rem);
>>>>    		strcat(buf, buf1);
>>>> +		if (strlen(buf) > 800) {
>>>> +			pr_alert("%s", buf);
>>>> +			buf[0] = 0;
>>>> +		}
>>>>    	}
>>>> -	SCALEOUT("%s", buf);
>>>> +	pr_alert("%s", buf);
it will not introduce partial lines here, buf  is always ended with '\n'

I have checked the regexp in tools/testing/selftests/rcutorture/bin/kvm-recheck-refscale.sh
and verify it with the new result, it always works.


Thanks
Zhijian



>>>>    err:
>>>>    	// This will shutdown everything including us.
>>>> -- 
>>>> 2.33.0
>>>>
>>>>
>>>>
>>
>