[LTP] [PATCH] shmget03: fix test when some shm segments already exist

[Alexey Kodanev]

On 12.07.2021 05:31, xuyang2018.jy@fujitsu.com wrote:
> Hi All
>> Hi!
>>>>> Yes, good point, that would be more precise for ENOSPC testing.
>>>> AFAIK, ltp doesn't support parallel test now. I think parallel test
>>>> maybe a future plan that is why we use docparase to collect each case's
>>>> used resources(so we can convert many groups, like pid, memory, disk
>>>> space..., then we can run pid group and memory groups test case parallelly).
>>> Yes, parallel support is not supported atm. Richie and Cyril has done some work
>>> on runltp-ng to support it. Yes, first it's needed to add support in resources
>>> (docparse), see Cyril's old block post [1].
>>
>> Besides most of the SHM tests will crash and burn if executed in
>> parallel. The SysV IPC shares a global namespace and because of that we
>> can't really write tests without assuming that we are the only one
>> manipulating them when the test is executed.
> I guess we should reach a consensus that how to fix this problem
> 1)use for loop to trigger this error
> 2)use CLONE_NEWIPC to trigger this error

Perhaps it can be done at the higher level, e.g. in the ltp tests
runner if some tests request it with a newipc flag...

> 3)Or we are the only one that use shm and we can add a api to count the 
> existed_cnt
> 
> ps: I don't want to leave this problem too long time.
> 
> Best Regards
> Yang Xu
>>