memory cgroup enhancements: add memory.stat file (d2ceb9b7) · Commits · 戴 / test

mm/memcontrol.c

+48 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@
		#include <linux/swap.h>
		#include <linux/spinlock.h>
		#include <linux/fs.h>
		#include <linux/seq_file.h>

		#include <asm/uaccess.h>

		@@ -794,6 +795,49 @@ static ssize_t mem_force_empty_read(struct cgroup *cont,
		}


		static const struct mem_cgroup_stat_desc {
		const char *msg;
		u64 unit;
		} mem_cgroup_stat_desc[] = {
		[MEM_CGROUP_STAT_CACHE] = { "cache", PAGE_SIZE, },
		[MEM_CGROUP_STAT_RSS] = { "rss", PAGE_SIZE, },
		};

		static int mem_control_stat_show(struct seq_file m, void arg)
		{
		struct cgroup *cont = m->private;
		struct mem_cgroup *mem_cont = mem_cgroup_from_cont(cont);
		struct mem_cgroup_stat *stat = &mem_cont->stat;
		int i;

		for (i = 0; i < ARRAY_SIZE(stat->cpustat[0].count); i++) {
		s64 val;

		val = mem_cgroup_read_stat(stat, i);
		val *= mem_cgroup_stat_desc[i].unit;
		seq_printf(m, "%s %lld\n", mem_cgroup_stat_desc[i].msg,
		(long long)val);
		}
		return 0;
		}

		static const struct file_operations mem_control_stat_file_operations = {
		.read = seq_read,
		.llseek = seq_lseek,
		.release = single_release,
		};

		static int mem_control_stat_open(struct inode unused, struct file file)
		{
		/* XXX __d_cont */
		struct cgroup *cont = file->f_dentry->d_parent->d_fsdata;

		file->f_op = &mem_control_stat_file_operations;
		return single_open(file, mem_control_stat_show, cont);
		}



		static struct cftype mem_cgroup_files[] = {
		{
		.name = "usage_in_bytes",
		@@ -821,6 +865,10 @@ static struct cftype mem_cgroup_files[] = {
		.write = mem_force_empty_write,
		.read = mem_force_empty_read,
		},
		{
		.name = "stat",
		.open = mem_control_stat_open,
		},
		};

		static struct mem_cgroup init_mem_cgroup;

Admin message