diff options
| -rw-r--r-- | include/linux/backing-dev.h | 4 | ||||
| -rw-r--r-- | mm/backing-dev.c | 84 |
2 files changed, 0 insertions, 88 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 238521a1984..2a9a9abc912 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -18,7 +18,6 @@ #include <linux/writeback.h> #include <linux/atomic.h> #include <linux/sysctl.h> -#include <linux/mutex.h> struct page; struct device; @@ -106,9 +105,6 @@ struct backing_dev_info { struct timer_list laptop_mode_wb_timer; - cpumask_t *flusher_cpumask; /* used for writeback thread scheduling */ - struct mutex flusher_cpumask_lock; - #ifdef CONFIG_DEBUG_FS struct dentry *debug_dir; struct dentry *debug_stats; diff --git a/mm/backing-dev.c b/mm/backing-dev.c index bd6a6cabef7..d3ca2b3ee17 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -10,7 +10,6 @@ #include <linux/module.h> #include <linux/writeback.h> #include <linux/device.h> -#include <linux/slab.h> #include <trace/events/writeback.h> static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0); @@ -222,63 +221,12 @@ static ssize_t max_ratio_store(struct device *dev, } BDI_SHOW(max_ratio, bdi->max_ratio) -static ssize_t cpu_list_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - struct backing_dev_info *bdi = dev_get_drvdata(dev); - struct bdi_writeback *wb = &bdi->wb; - cpumask_var_t newmask; - ssize_t ret; - struct task_struct *task; - - if (!alloc_cpumask_var(&newmask, GFP_KERNEL)) - return -ENOMEM; - - ret = cpulist_parse(buf, newmask); - if (!ret) { - spin_lock_bh(&bdi->wb_lock); - task = wb->task; - if (task) - get_task_struct(task); - spin_unlock_bh(&bdi->wb_lock); - - mutex_lock(&bdi->flusher_cpumask_lock); - if (task) { - ret = set_cpus_allowed_ptr(task, newmask); - put_task_struct(task); - } - if (ret == 0) { - cpumask_copy(bdi->flusher_cpumask, newmask); - ret = count; - } - mutex_unlock(&bdi->flusher_cpumask_lock); - - } - free_cpumask_var(newmask); - - return ret; -} - -static ssize_t cpu_list_show(struct device *dev, - struct device_attribute *attr, char *page) -{ - struct backing_dev_info *bdi = dev_get_drvdata(dev); - ssize_t ret; - - mutex_lock(&bdi->flusher_cpumask_lock); - ret = cpulist_scnprintf(page, PAGE_SIZE-1, bdi->flusher_cpumask); - mutex_unlock(&bdi->flusher_cpumask_lock); - - return ret; -} - #define __ATTR_RW(attr) __ATTR(attr, 0644, attr##_show, attr##_store) static struct device_attribute bdi_dev_attrs[] = { __ATTR_RW(read_ahead_kb), __ATTR_RW(min_ratio), __ATTR_RW(max_ratio), - __ATTR_RW(cpu_list), __ATTR_NULL, }; @@ -480,7 +428,6 @@ static int bdi_forker_thread(void *ptr) writeback_inodes_wb(&bdi->wb, 1024, WB_REASON_FORKER_THREAD); } else { - int ret; /* * The spinlock makes sure we do not lose * wake-ups when racing with 'bdi_queue_work()'. @@ -490,14 +437,6 @@ static int bdi_forker_thread(void *ptr) spin_lock_bh(&bdi->wb_lock); bdi->wb.task = task; spin_unlock_bh(&bdi->wb_lock); - mutex_lock(&bdi->flusher_cpumask_lock); - ret = set_cpus_allowed_ptr(task, - bdi->flusher_cpumask); - mutex_unlock(&bdi->flusher_cpumask_lock); - if (ret) - printk_once("%s: failed to bind flusher" - " thread %s, error %d\n", - __func__, task->comm, ret); wake_up_process(task); } bdi_clear_pending(bdi); @@ -570,17 +509,6 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent, dev_name(dev)); if (IS_ERR(wb->task)) return PTR_ERR(wb->task); - } else { - int node; - /* - * Set up a default cpumask for the flusher threads that - * includes all cpus on the same numa node as the device. - * The mask may be overridden via sysfs. - */ - node = dev_to_node(bdi->dev); - if (node != NUMA_NO_NODE) - cpumask_copy(bdi->flusher_cpumask, - cpumask_of_node(node)); } bdi_debug_register(bdi, dev_name(dev)); @@ -706,15 +634,6 @@ int bdi_init(struct backing_dev_info *bdi) bdi_wb_init(&bdi->wb, bdi); - if (!bdi_cap_flush_forker(bdi)) { - bdi->flusher_cpumask = kmalloc(sizeof(cpumask_t), GFP_KERNEL); - if (!bdi->flusher_cpumask) - return -ENOMEM; - cpumask_setall(bdi->flusher_cpumask); - mutex_init(&bdi->flusher_cpumask_lock); - } else - bdi->flusher_cpumask = NULL; - for (i = 0; i < NR_BDI_STAT_ITEMS; i++) { err = percpu_counter_init(&bdi->bdi_stat[i], 0); if (err) @@ -737,7 +656,6 @@ int bdi_init(struct backing_dev_info *bdi) err: while (i--) percpu_counter_destroy(&bdi->bdi_stat[i]); - kfree(bdi->flusher_cpumask); } return err; @@ -765,8 +683,6 @@ void bdi_destroy(struct backing_dev_info *bdi) bdi_unregister(bdi); - kfree(bdi->flusher_cpumask); - /* * If bdi_unregister() had already been called earlier, the * wakeup_timer could still be armed because bdi_prune_sb() |