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

["Lukáš Doktor" <ldoktor@redhat.com>]

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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