From 39106dcf85285e78f3b290022122c76f851379b8 Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Tue, 8 Apr 2008 11:43:03 -0700 Subject: [PATCH] cpumask: use new cpus_scnprintf function * Cleaned up references to cpumask_scnprintf() and added new cpulist_scnprintf() interfaces where appropriate. * Fix some small bugs (or code efficiency improvments) for various uses of cpumask_scnprintf. * Clean up some checkpatch errors. Signed-off-by: Mike Travis Signed-off-by: Ingo Molnar --- drivers/base/node.c | 24 +++++++++++++++++++----- drivers/base/topology.c | 41 ++++++++++++++++++++++++++++++++++------- drivers/pci/pci-sysfs.c | 20 ++++++++++++++++++-- drivers/pci/probe.c | 27 +++++++++++++++++++++++---- kernel/cpuset.c | 8 ++++++++ kernel/sched_stats.h | 8 ++++++-- 6 files changed, 108 insertions(+), 20 deletions(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index 8e3f25bb8f8..12fde2d03d6 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -19,22 +19,34 @@ static struct sysdev_class node_class = { }; -static ssize_t node_read_cpumap(struct sys_device * dev, char * buf) +static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf) { struct node *node_dev = to_node(dev); node_to_cpumask_ptr(mask, node_dev->sysdev.id); int len; - /* 2004/06/03: buf currently PAGE_SIZE, need > 1 char per 4 bits. */ - BUILD_BUG_ON(MAX_NUMNODES/4 > PAGE_SIZE/2); + /* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */ + BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1)); - len = cpumask_scnprintf(buf, PAGE_SIZE-2, *mask); + len = type? + cpulist_scnprintf(buf, PAGE_SIZE-2, *mask): + cpumask_scnprintf(buf, PAGE_SIZE-2, *mask); buf[len++] = '\n'; buf[len] = '\0'; return len; } -static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumap, NULL); +static inline ssize_t node_read_cpumask(struct sys_device *dev, char *buf) +{ + return node_read_cpumap(dev, 0, buf); +} +static inline ssize_t node_read_cpulist(struct sys_device *dev, char *buf) +{ + return node_read_cpumap(dev, 1, buf); +} + +static SYSDEV_ATTR(cpumap, S_IRUGO, node_read_cpumask, NULL); +static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL); #define K(x) ((x) << (PAGE_SHIFT - 10)) static ssize_t node_read_meminfo(struct sys_device * dev, char * buf) @@ -150,6 +162,7 @@ int register_node(struct node *node, int num, struct node *parent) if (!error){ sysdev_create_file(&node->sysdev, &attr_cpumap); + sysdev_create_file(&node->sysdev, &attr_cpulist); sysdev_create_file(&node->sysdev, &attr_meminfo); sysdev_create_file(&node->sysdev, &attr_numastat); sysdev_create_file(&node->sysdev, &attr_distance); @@ -167,6 +180,7 @@ int register_node(struct node *node, int num, struct node *parent) void unregister_node(struct node *node) { sysdev_remove_file(&node->sysdev, &attr_cpumap); + sysdev_remove_file(&node->sysdev, &attr_cpulist); sysdev_remove_file(&node->sysdev, &attr_meminfo); sysdev_remove_file(&node->sysdev, &attr_numastat); sysdev_remove_file(&node->sysdev, &attr_distance); diff --git a/drivers/base/topology.c b/drivers/base/topology.c index e1d3ad4db2f..fdf4044d2e7 100644 --- a/drivers/base/topology.c +++ b/drivers/base/topology.c @@ -40,15 +40,38 @@ static ssize_t show_##name(struct sys_device *dev, char *buf) \ return sprintf(buf, "%d\n", topology_##name(cpu)); \ } -#define define_siblings_show_func(name) \ -static ssize_t show_##name(struct sys_device *dev, char *buf) \ +static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf) +{ + ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf; + int n = 0; + + if (len > 1) { + n = type? + cpulist_scnprintf(buf, len-2, *mask): + cpumask_scnprintf(buf, len-2, *mask); + buf[n++] = '\n'; + buf[n] = '\0'; + } + return n; +} + +#define define_siblings_show_map(name) \ +static inline ssize_t show_##name(struct sys_device *dev, char *buf) \ { \ - ssize_t len = -1; \ unsigned int cpu = dev->id; \ - len = cpumask_scnprintf(buf, NR_CPUS+1, topology_##name(cpu)); \ - return (len + sprintf(buf + len, "\n")); \ + return show_cpumap(0, &(topology_##name(cpu)), buf); \ } +#define define_siblings_show_list(name) \ +static inline ssize_t show_##name##_list(struct sys_device *dev, char *buf) \ +{ \ + unsigned int cpu = dev->id; \ + return show_cpumap(1, &(topology_##name(cpu)), buf); \ +} + +#define define_siblings_show_func(name) \ + define_siblings_show_map(name); define_siblings_show_list(name) + #ifdef topology_physical_package_id define_id_show_func(physical_package_id); define_one_ro(physical_package_id); @@ -68,7 +91,9 @@ define_one_ro(core_id); #ifdef topology_thread_siblings define_siblings_show_func(thread_siblings); define_one_ro(thread_siblings); -#define ref_thread_siblings_attr &attr_thread_siblings.attr, +define_one_ro(thread_siblings_list); +#define ref_thread_siblings_attr \ + &attr_thread_siblings.attr, &attr_thread_siblings_list.attr, #else #define ref_thread_siblings_attr #endif @@ -76,7 +101,9 @@ define_one_ro(thread_siblings); #ifdef topology_core_siblings define_siblings_show_func(core_siblings); define_one_ro(core_siblings); -#define ref_core_siblings_attr &attr_core_siblings.attr, +define_one_ro(core_siblings_list); +#define ref_core_siblings_attr \ + &attr_core_siblings.attr, &attr_core_siblings_list.attr, #else #define ref_core_siblings_attr #endif diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 8dcf1458aa2..8d9d648daeb 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -73,8 +73,23 @@ static ssize_t local_cpus_show(struct device *dev, mask = pcibus_to_cpumask(to_pci_dev(dev)->bus); len = cpumask_scnprintf(buf, PAGE_SIZE-2, mask); - strcat(buf,"\n"); - return 1+len; + buf[len++] = '\n'; + buf[len] = '\0'; + return len; +} + + +static ssize_t local_cpulist_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + cpumask_t mask; + int len; + + mask = pcibus_to_cpumask(to_pci_dev(dev)->bus); + len = cpulist_scnprintf(buf, PAGE_SIZE-2, mask); + buf[len++] = '\n'; + buf[len] = '\0'; + return len; } /* show resources */ @@ -201,6 +216,7 @@ struct device_attribute pci_dev_attrs[] = { __ATTR_RO(class), __ATTR_RO(irq), __ATTR_RO(local_cpus), + __ATTR_RO(local_cpulist), __ATTR_RO(modalias), #ifdef CONFIG_NUMA __ATTR_RO(numa_node), diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 2db2e4bb0d1..4b3011a23ef 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -82,6 +82,7 @@ void pci_remove_legacy_files(struct pci_bus *bus) { return; } * PCI Bus Class Devices */ static ssize_t pci_bus_show_cpuaffinity(struct device *dev, + int type, struct device_attribute *attr, char *buf) { @@ -89,12 +90,30 @@ static ssize_t pci_bus_show_cpuaffinity(struct device *dev, cpumask_t cpumask; cpumask = pcibus_to_cpumask(to_pci_bus(dev)); - ret = cpumask_scnprintf(buf, PAGE_SIZE, cpumask); - if (ret < PAGE_SIZE) - buf[ret++] = '\n'; + ret = type? + cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask): + cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask); + buf[ret++] = '\n'; + buf[ret] = '\0'; return ret; } -DEVICE_ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpuaffinity, NULL); + +static ssize_t inline pci_bus_show_cpumaskaffinity(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return pci_bus_show_cpuaffinity(dev, 0, attr, buf); +} + +static ssize_t inline pci_bus_show_cpulistaffinity(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return pci_bus_show_cpuaffinity(dev, 1, attr, buf); +} + +DEVICE_ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL); +DEVICE_ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL); /* * PCI Bus Class diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 6b9ac296a05..b0c870b2ac3 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2254,8 +2254,16 @@ void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task) m->count += cpumask_scnprintf(m->buf + m->count, m->size - m->count, task->cpus_allowed); seq_printf(m, "\n"); + seq_printf(m, "Cpus_allowed_list:\t"); + m->count += cpulist_scnprintf(m->buf + m->count, m->size - m->count, + task->cpus_allowed); + seq_printf(m, "\n"); seq_printf(m, "Mems_allowed:\t"); m->count += nodemask_scnprintf(m->buf + m->count, m->size - m->count, task->mems_allowed); seq_printf(m, "\n"); + seq_printf(m, "Mems_allowed_list:\t"); + m->count += nodelist_scnprintf(m->buf + m->count, m->size - m->count, + task->mems_allowed); + seq_printf(m, "\n"); } diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h index 5b32433e7ee..5bae2e0c3ff 100644 --- a/kernel/sched_stats.h +++ b/kernel/sched_stats.h @@ -9,6 +9,11 @@ static int show_schedstat(struct seq_file *seq, void *v) { int cpu; + int mask_len = NR_CPUS/32 * 9; + char *mask_str = kmalloc(mask_len, GFP_KERNEL); + + if (mask_str == NULL) + return -ENOMEM; seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION); seq_printf(seq, "timestamp %lu\n", jiffies); @@ -36,9 +41,8 @@ static int show_schedstat(struct seq_file *seq, void *v) preempt_disable(); for_each_domain(cpu, sd) { enum cpu_idle_type itype; - char mask_str[NR_CPUS]; - cpumask_scnprintf(mask_str, NR_CPUS, sd->span); + cpumask_scnprintf(mask_str, mask_len, sd->span); seq_printf(seq, "domain%d %s", dcount++, mask_str); for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES; itype++) { -- 2.41.1