Re: [LTP] Posix test case mmap/31-1 fails on Linux/eglibc

Kang Kai
2012-01-04T03:32:48Z

On 2012年01月04日 10:57, Wanlong Gao wrote:
> On 01/04/2012 10:50 AM, Yasuaki Ishimatsu wrote:
>
>> Hi Gao,
>>
>> 2012/01/04 11:05, Wanlong Gao wrote:
>>> On 01/04/2012 09:37 AM, Yasuaki Ishimatsu wrote:
>>>
>>>> Hi Kai,
>>>>
>>>> 2011/12/28 19:55, Kang Kai wrote:
>>>>> Hi all,
>>>>>
>>>>> I run mmap/31-1 failed with ENOMEM on linux, with error message:
>>>>> off: fffffffffffff000, len: fffffffffffff000
>>>>> Test FAIL: expect EOVERFLOW but get other error: Cannot allocate memory
>>>>>
>>>>> But compare to mmap/24-2, it mmap() the same length but pass. Its output:
>>>>> available memory: 18446744073709551615
>>>>> addr: 7f78c54fa000, len: ffffffffffffffff
>>>>> addr: 7f78c54fa000, len: fffffffffffff000
>>>>> Test Pass: mmap/24-2.c Get ENOMEM: Cannot allocate memory
>>>>>
>>>>> So I suppose that mmap/31-1 may need update, but I don't know how to
>>>>> make mmap() overflow as expect.
>>>>> Any suggestion is appreciated.
>>>> I don't think mmap/31-1 need update since it is Linux Kernel's problem,
>>>> not the test's problem. The problem is being discussed on LKML.
>>>>
>>>> https://lkml.org/lkml/2011/12/22/85
>>>
>>> But it seems that the patch was not acceptable.
>> As you say, it has not been accepted yet.
>> But I think Linux will be fixed to return EOVERFLOW in mmap/31-1's test
>> in the near future.
>
> Yeah, agree, so we need not update this test case now and wait for a while
> to let the kernel bug to be fixed.

OK, thank you very much!

>
>> Regards,
>> Yasuaki Ishimatsu
>>
>>> Thanks
>>> -Wanlong Gao
>>>
>>>> Regards,
>>>> Yasuaki Ishimatsu
>>>>
>>>>> Regards,
>>>>> Kai
>>>
>>>
>>>