Re: [LTP] Broken kernel/mem/ksm01 test

[Caspar Zhang <caspar@casparzhang.com>]

Zhouping, would you like to have a look at the issue below?

Caspar

On 07/20/2012 09:06 PM, Lukáš Doktor wrote:
> On 07/20/2012 02:45 PM, Lukáš Doktor wrote:
>> Hi guys,
>>
>> I'm testing LTP-20120614 on Fedora 17 and it always stuck on ksm01 test.
>>
>> I went through sources and the problem is I have KSM already enabled
>> so the full_scans is a huge number. The function _group_check waits
>> till KSM does 3 * full_scans which in my case never ends (well it
>> might finish in a couple of years).
>>
>> To me it doesn't even make sense to wait 3 * full_scans as in the
>> first check it waits 1-2 seconds, in second check it waits few seconds
>> and it keeps growing further you goes.
>>
>> Would you please take look on this issue? I'd really appreciate it.
>>
>> Kind regards,
>> Lukáš Doktor
>
> Anyway if you think it should stay 3 * full_scans would you please at
> least reset the counter before the test start?
>
> --- _mem.c      2012-07-20 13:39:20.351738873 +0200
> +++ mem.c       2012-07-20 14:58:52.192157167 +0200
> @@ -415,6 +415,7 @@ void create_same_memory(int size, int nu
>                   }
>           }
>           tst_resm(TINFO, "KSM merging...");
> +       write_file(PATH_KSM "run", "2");
>           write_file(PATH_KSM "run", "1");
>           snprintf(buf, BUFSIZ, "%ld", size * pages * num);
>           write_file(PATH_KSM "pages_to_scan", buf);
>
> I tested it and it works better (it fails, but at least it finishes).
> Anyway IMO it would be better to calculate the number of necessarily
> scans differently.
>
> regards,
> Lukáš
>
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