From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1SpYjW-0005sH-7o for ltp-list@lists.sourceforge.net; Fri, 13 Jul 2012 05:48:06 +0000 Received: from mail-pb0-f47.google.com ([209.85.160.47]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1SpYjT-0005Jd-VN for ltp-list@lists.sourceforge.net; Fri, 13 Jul 2012 05:48:06 +0000 Received: by pbbrq2 with SMTP id rq2so4830981pbb.34 for ; Thu, 12 Jul 2012 22:47:58 -0700 (PDT) Message-ID: <4FFFB681.9000803@casparzhang.com> Date: Fri, 13 Jul 2012 13:47:45 +0800 From: Caspar Zhang MIME-Version: 1.0 References: <0fbd4f879e0452245a9b4dc3ba7abc878d4161bd.1342102159.git.jstancek@redhat.com> In-Reply-To: <0fbd4f879e0452245a9b4dc3ba7abc878d4161bd.1342102159.git.jstancek@redhat.com> Subject: Re: [LTP] [PATCH] numa_helper: fix compatibility with older libnuma List-Id: Linux Test Project General Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-list-bounces@lists.sourceforge.net To: Jan Stancek Cc: ltp-list@lists.sourceforge.net On 07/12/2012 10:09 PM, Jan Stancek wrote: > numa_helper relied on functions that do not exist > in old libnuma (<1), which caused that it couldn't be > compiled on old distros, for example RHEL 5.3. > > Old libnuma and kernel also do not support MPOL_F_MEMS_ALLOWED, > in which case it will assume that any node with memory > 0 can > be used. > > This patch adds compatibility for older versions, I tested it with: > numactl-0.9.8-7.el5 > numactl-2.0.3-9.el6 > numactl-2.0.7-6.el7 > > Signed-off-by: Jan Stancek > --- > testcases/kernel/syscalls/numa/lib/Makefile | 2 +- > testcases/kernel/syscalls/numa/lib/numa_helper.c | 52 +++++++++++++++++----- > 2 files changed, 41 insertions(+), 13 deletions(-) > > diff --git a/testcases/kernel/syscalls/numa/lib/Makefile b/testcases/kernel/syscalls/numa/lib/Makefile > index d4a6f41..ba2fb48 100644 > --- a/testcases/kernel/syscalls/numa/lib/Makefile > +++ b/testcases/kernel/syscalls/numa/lib/Makefile > @@ -20,7 +20,7 @@ top_srcdir ?= ../../../../.. > > include $(top_srcdir)/include/mk/env_pre.mk > > -CPPFLAGS += -I../../../include > +CPPFLAGS += -I../../../include $(NUMA_CPPFLAGS) > LIB := libnuma_helper.a > > include $(top_srcdir)/include/mk/lib.mk > diff --git a/testcases/kernel/syscalls/numa/lib/numa_helper.c b/testcases/kernel/syscalls/numa/lib/numa_helper.c > index 855ee2c..20b06ca 100644 > --- a/testcases/kernel/syscalls/numa/lib/numa_helper.c > +++ b/testcases/kernel/syscalls/numa/lib/numa_helper.c > @@ -53,46 +53,74 @@ int get_allowed_nodes_arr(int *num_allowed_nodes, int **allowed_nodes) > { > #if HAVE_NUMA_H > int i; > - struct bitmask *allowed_nodemask = NULL; > + nodemask_t *allowed_nodemask = NULL; > + unsigned long max_node; > + > +#if !defined(LIBNUMA_API_VERSION) || LIBNUMA_API_VERSION < 2 > + max_node = NUMA_NUM_NODES; > + /* > + * NUMA_NUM_NODES is not reliable, libnuma >=2 is looking > + * at /proc/self/status to figure out correct number. > + * If buffer is not large enough get_mempolicy will fail with EINVAL. > + */ > + if (max_node < 1024) > + max_node = 1024; > +#else > + max_node = numa_max_possible_node() + 1; > #endif > +#endif /* HAVE_NUMA_H */ > + > *num_allowed_nodes = 0; > if (allowed_nodes) > *allowed_nodes = NULL; > > -#if HAVE_NUMA_H && HAVE_MPOL_CONSTANTS > - if ((allowed_nodemask = numa_allocate_nodemask()) == NULL) > +#if HAVE_NUMA_H > + if ((allowed_nodemask = malloc(max_node/8+1)) == NULL) Better not use assignment in if condition, you need use: allowed_nodemask = malloc(max_node/8+1); if (allowed_nodemask == NULL) .... Else checkpatch.pl will complain. Rest looks good to me. Thanks, Caspar > return -1; > + nodemask_zero(allowed_nodemask); > > if (allowed_nodes) { > - *allowed_nodes = malloc(sizeof(int)*allowed_nodemask->size); > - if (*allowed_nodes == NULL) > + *allowed_nodes = malloc(sizeof(int)*max_node); > + if (*allowed_nodes == NULL) { > + free(allowed_nodemask); > return -1; > + } > } > > +#if MPOL_F_MEMS_ALLOWED > /* > * avoid numa_get_mems_allowed(), because of bug in getpol() > * utility function in older versions: > * http://www.spinics.net/lists/linux-numa/msg00849.html > */ > - if (syscall(__NR_get_mempolicy, NULL, allowed_nodemask->maskp, > - allowed_nodemask->size, 0, MPOL_F_MEMS_ALLOWED) < 0) { > - numa_bitmask_free(allowed_nodemask); > + if (syscall(__NR_get_mempolicy, NULL, allowed_nodemask->n, > + max_node, 0, MPOL_F_MEMS_ALLOWED) < 0) { > + free(allowed_nodemask); > if (allowed_nodes) { > free(*allowed_nodes); > *allowed_nodes = NULL; > } > return -2; > } > +#else > + /* > + * old libnuma/kernel don't have MPOL_F_MEMS_ALLOWED, so let's assume > + * that we can use any node with memory > 0 > + */ > + for (i = 0; i < max_node; i++) > + if (numa_node_size64(i, NULL) > 0) > + nodemask_set(allowed_nodemask, i); > > - for (i = 0; i < allowed_nodemask->size; i++) { > - if (numa_bitmask_isbitset(allowed_nodemask, i)) { > +#endif /* MPOL_F_MEMS_ALLOWED */ > + for (i = 0; i < max_node; i++) { > + if (nodemask_isset(allowed_nodemask, i)) { > if (allowed_nodes) > (*allowed_nodes)[*num_allowed_nodes] = i; > (*num_allowed_nodes)++; > } > } > - numa_bitmask_free(allowed_nodemask); > -#endif > + free(allowed_nodemask); > +#endif /* HAVE_NUMA_H */ > return 0; > } > > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list