From mboxrd@z Thu Jan 1 00:00:00 1970 From: xuyang2018.jy@fujitsu.com Date: Mon, 12 Jul 2021 02:31:52 +0000 Subject: [LTP] [PATCH] shmget03: fix test when some shm segments already exist In-Reply-To: References: <20210706105758.43220-1-aleksei.kodanev@bell-sw.com> <381b8420-3dba-d7c1-027c-e2e2adc719de@bell-sw.com> <60E50AB4.7050404@fujitsu.com> Message-ID: <60EBA9C3.4050103@fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it 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 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 >