[ovs-dev] [PATCHv17 1/2] ovs-thread: Add pthread spin lock support.

Ilya Maximets i.maximets at samsung.com
Thu Jul 18 16:38:03 UTC 2019

On 17.07.2019 23:23, William Tu wrote:
> The patch adds the basic spin lock functions:
> ovs_spin_{lock, try_lock, unlock, init, destroy}.
> OSX does not support pthread spin lock, so make it
> linux only.

The last sentence seems redundant now and could be removed.

The patch looks good to me. One thing I'd like to add is the additional
AC_SEARCH_LIBS([pthread_spin_lock], [pthread])
This way we'll be sure that '-lpthread' will be passed to the function
check if needed.

So, I'm suggesting:

diff --git a/configure.ac b/configure.ac
index c33935499..398a390a5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -79,6 +79,8 @@ AC_SEARCH_LIBS([clock_gettime], [rt])
 AC_SEARCH_LIBS([timer_create], [rt])
 AC_SEARCH_LIBS([pthread_rwlock_tryrdlock], [pthread])
 AC_SEARCH_LIBS([pthread_rwlockattr_destroy], [pthread])
+AC_SEARCH_LIBS([pthread_spin_lock], [pthread])
@@ -109,7 +111,6 @@ AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id], [], [],
 #include <sys/types.h>
 #include <netinet/in.h>]])
 AC_CHECK_FUNCS([mlockall strnlen getloadavg statvfs getmntent_r sendmmsg clock_gettime])
 AC_CHECK_HEADERS([mntent.h sys/statvfs.h linux/types.h linux/if_ether.h])
 AC_CHECK_HEADERS([linux/net_namespace.h stdatomic.h bits/floatn-common.h])
 AC_CHECK_HEADERS([net/if_mib.h], [], [], [[#include <sys/types.h>

If above diff is OK, I could apply it myself right before merging the patch.
William, Ben, what do you think?

Other than that,
Acked-by: Ilya Maximets <i.maximets at samsung.com>

Best regards, Ilya Maximets.

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