From: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
To: shuah@kernel.org, skhan@linuxfoundation.org,
linux-kselftest@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
tony.luck@intel.com, reinette.chatre@intel.com,
babu.moger@amd.com, james.morse@arm.com,
ravi.v.shankar@intel.com, fenghua.yu@intel.com, x86@kernel.org,
linux-kernel@vger.kernel, dan.carpenter@oracle.com,
dcb314@hotmail.com,
Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Subject: [PATCH V2 16/19] selftests/resctrl: Umount resctrl FS only if mounted
Date: Mon, 18 May 2020 15:08:36 -0700 [thread overview]
Message-ID: <f65df6aa5dc5b66ac804389e7859a08101107285.1589835155.git.sai.praneeth.prakhya@intel.com> (raw)
In-Reply-To: <cover.1589835155.git.sai.praneeth.prakhya@intel.com>
Currently, umount_resctrlfs() directly attempts to unmount resctrl FS
without checking if resctrl FS is already mounted or not. But, there
could be situations where-in the caller might not know if resctrl FS is
already mounted or not. The caller might want to unmount resctrl FS _only_
if it's already mounted.
Hence, change umount_resctrlfs() such that it now first checks if resctrl
FS is mounted or not and unmounts resctrl FS only if it's already mounted
and does nothing if it's not mounted.
Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
---
tools/testing/selftests/resctrl/resctrlfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
index 83cd3b026c52..ebc8e3b4f7ff 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -92,8 +92,10 @@ int remount_resctrlfs(bool mum_resctrlfs)
void umount_resctrlfs(void)
{
- if (umount(RESCTRL_PATH))
- perror("# Unable to umount resctrl");
+ if (!find_resctrl_mount(NULL)) {
+ if (umount(RESCTRL_PATH))
+ perror("# Unable to umount resctrl");
+ }
}
/*
--
2.19.1
next prev parent reply other threads:[~2020-05-18 22:14 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-18 22:08 [PATCH V2 00/19] Miscellaneous fixes for resctrl selftests Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 01/19] selftests/resctrl: Rename CQM test as CMT test Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 02/19] selftests/resctrl: Fix typo Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 03/19] selftests/resctrl: Fix typo in help text Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 04/19] selftests/resctrl: Declare global variables as extern Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 05/19] selftests/resctrl: Return if resctrl file system is not supported Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 06/19] selftests/resctrl: Check for resctrl mount point only if resctrl FS is supported Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 07/19] selftests/resctrl: Use resctrl/info for feature detection Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 08/19] selftests/resctrl: Ensure sibling CPU is not same as original CPU Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 09/19] selftests/resctrl: Fix missing options "-n" and "-p" Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 10/19] selftests/resctrl: Fix MBA/MBM results reporting format Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 11/19] selftests/resctrl: Abort running tests if not root user Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 12/19] selftests/resctrl: Enable gcc checks to detect buffer overflows Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 13/19] selftests/resctrl: Dynamically select buffer size for CAT test Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 14/19] selftests/resctrl: Skip the test if requested resctrl feature is not supported Sai Praneeth Prakhya
2020-05-20 23:46 ` Reinette Chatre
2020-05-21 17:12 ` Prakhya, Sai Praneeth
2020-05-18 22:08 ` [PATCH V2 15/19] selftests/resctrl: Change return type of umount_resctrlfs() to void Sai Praneeth Prakhya
2020-05-20 23:52 ` Reinette Chatre
2020-05-21 17:19 ` Prakhya, Sai Praneeth
2020-05-21 18:15 ` Reinette Chatre
2020-05-18 22:08 ` Sai Praneeth Prakhya [this message]
2020-05-18 22:08 ` [PATCH V2 17/19] selftests/resctrl: Unmount resctrl FS after running all tests Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 18/19] selftests/resctrl: Fix incorrect parsing of iMC counters Sai Praneeth Prakhya
2020-05-18 22:08 ` [PATCH V2 19/19] selftests/resctrl: Fix checking for < 0 for unsigned values Sai Praneeth Prakhya
2020-05-21 16:12 ` [PATCH V2 00/19] Miscellaneous fixes for resctrl selftests Reinette Chatre
2020-05-21 17:28 ` Prakhya, Sai Praneeth
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