Re: [LTP] [RFC PATCH] regression test for 64bit sendfile capped at 2G

[Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>]

Hi,

On 07/07/2014 02:51 PM, Han Pingtian wrote:
> On Tue, Jul 08, 2014 at 02:33:42PM +0800, Xiaoguang Wang wrote:
>> Hi,
>>
>> On 07/04/2014 11:16 AM, Han Pingtian wrote:
>>> Hi,
>>>
>>> Please review this patch. Thanks.
>>>
>>> There is a bug on 64bit sendfile() with large file, please see
>>> https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-June/118128.html
>>> for details.
>>
>> I'd like to ask an irrelevant question about that where can we get such bug report or similar issues
>> about syscalls from a stable place(url), or how did you found this issue, thanks.
>>
>> Give that currently there are 1039 test cases about syscalls in LTP(cat runtest/syscalls | grep -v "^#" | sed -e '/^$/d' | wc -l),
>> we can tell that syscalls is a very big test suite in LTP, so I'd like to add all similar regression test about
>> syscalls to LTP, which will expand ltp's test coverage, thanks. 
>>
>> Regards,
>> Xiaoguang Wang
>>
> Thanks for your reply. I knew this problem just by accidental. It wasn't
> found by me, but someone else. We are asked why we couldn't find it at
> first time though we had run ltp to test the syscalls. So I think it
> would be better to include a regession test for it to ltp. I think we
> can find out all those regressions by mointoring bug report web site and
> kernel's mailing list and something like these.

Yeah, kernel mail list would be the best place to find such issues, but usually
it needs more time to figure them out :)

As for you patch, I don't know whether you have read the test-writing-guidelines.txt first, if not,
please see https://github.com/linux-test-project/ltp/blob/master/doc/test-writing-guidelines.txt.
For example, there are already many safe_* in ltp, you can use them, which will simplify your error checking, thanks.

Regards,
Xiaoguang Wang 



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