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-rw-r--r--fs/proc/array.c4
-rw-r--r--fs/proc/base.c124
-rw-r--r--fs/proc/kcore.c2
-rw-r--r--fs/proc/proc_sysctl.c9
-rw-r--r--fs/proc/task_mmu.c6
5 files changed, 128 insertions, 17 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 55443426561..d66248a1919 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -438,7 +438,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
min_flt += sig->min_flt;
maj_flt += sig->maj_flt;
- thread_group_times(task, &utime, &stime);
+ thread_group_cputime_adjusted(task, &utime, &stime);
gtime += sig->gtime;
}
@@ -454,7 +454,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
if (!whole) {
min_flt = task->min_flt;
maj_flt = task->maj_flt;
- task_times(task, &utime, &stime);
+ task_cputime_adjusted(task, &utime, &stime);
gtime = task->gtime;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 7621dc51cff..5a5a0be40e4 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -873,12 +873,119 @@ static const struct file_operations proc_environ_operations = {
.release = mem_release,
};
+static ssize_t oom_adj_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
+ char buffer[PROC_NUMBUF];
+ int oom_adj = OOM_ADJUST_MIN;
+ size_t len;
+ unsigned long flags;
+
+ if (!task)
+ return -ESRCH;
+ if (lock_task_sighand(task, &flags)) {
+ if (task->signal->oom_score_adj == OOM_SCORE_ADJ_MAX)
+ oom_adj = OOM_ADJUST_MAX;
+ else
+ oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
+ OOM_SCORE_ADJ_MAX;
+ unlock_task_sighand(task, &flags);
+ }
+ put_task_struct(task);
+ len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
+ return simple_read_from_buffer(buf, count, ppos, buffer, len);
+}
+
+static ssize_t oom_adj_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct task_struct *task;
+ char buffer[PROC_NUMBUF];
+ int oom_adj;
+ unsigned long flags;
+ int err;
+
+ memset(buffer, 0, sizeof(buffer));
+ if (count > sizeof(buffer) - 1)
+ count = sizeof(buffer) - 1;
+ if (copy_from_user(buffer, buf, count)) {
+ err = -EFAULT;
+ goto out;
+ }
+
+ err = kstrtoint(strstrip(buffer), 0, &oom_adj);
+ if (err)
+ goto out;
+ if ((oom_adj < OOM_ADJUST_MIN || oom_adj > OOM_ADJUST_MAX) &&
+ oom_adj != OOM_DISABLE) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ task = get_proc_task(file->f_path.dentry->d_inode);
+ if (!task) {
+ err = -ESRCH;
+ goto out;
+ }
+
+ task_lock(task);
+ if (!task->mm) {
+ err = -EINVAL;
+ goto err_task_lock;
+ }
+
+ if (!lock_task_sighand(task, &flags)) {
+ err = -ESRCH;
+ goto err_task_lock;
+ }
+
+ /*
+ * Scale /proc/pid/oom_score_adj appropriately ensuring that a maximum
+ * value is always attainable.
+ */
+ if (oom_adj == OOM_ADJUST_MAX)
+ oom_adj = OOM_SCORE_ADJ_MAX;
+ else
+ oom_adj = (oom_adj * OOM_SCORE_ADJ_MAX) / -OOM_DISABLE;
+
+ if (oom_adj < task->signal->oom_score_adj &&
+ !capable(CAP_SYS_RESOURCE)) {
+ err = -EACCES;
+ goto err_sighand;
+ }
+
+ /*
+ * /proc/pid/oom_adj is provided for legacy purposes, ask users to use
+ * /proc/pid/oom_score_adj instead.
+ */
+ printk_once(KERN_WARNING "%s (%d): /proc/%d/oom_adj is deprecated, please use /proc/%d/oom_score_adj instead.\n",
+ current->comm, task_pid_nr(current), task_pid_nr(task),
+ task_pid_nr(task));
+
+ task->signal->oom_score_adj = oom_adj;
+ trace_oom_score_adj_update(task);
+err_sighand:
+ unlock_task_sighand(task, &flags);
+err_task_lock:
+ task_unlock(task);
+ put_task_struct(task);
+out:
+ return err < 0 ? err : count;
+}
+
+static const struct file_operations proc_oom_adj_operations = {
+ .read = oom_adj_read,
+ .write = oom_adj_write,
+ .llseek = generic_file_llseek,
+};
+
static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
struct task_struct *task = get_proc_task(file->f_path.dentry->d_inode);
char buffer[PROC_NUMBUF];
- int oom_score_adj = OOM_SCORE_ADJ_MIN;
+ short oom_score_adj = OOM_SCORE_ADJ_MIN;
unsigned long flags;
size_t len;
@@ -889,7 +996,7 @@ static ssize_t oom_score_adj_read(struct file *file, char __user *buf,
unlock_task_sighand(task, &flags);
}
put_task_struct(task);
- len = snprintf(buffer, sizeof(buffer), "%d\n", oom_score_adj);
+ len = snprintf(buffer, sizeof(buffer), "%hd\n", oom_score_adj);
return simple_read_from_buffer(buf, count, ppos, buffer, len);
}
@@ -936,15 +1043,15 @@ static ssize_t oom_score_adj_write(struct file *file, const char __user *buf,
goto err_task_lock;
}
- if (oom_score_adj < task->signal->oom_score_adj_min &&
+ if ((short)oom_score_adj < task->signal->oom_score_adj_min &&
!capable(CAP_SYS_RESOURCE)) {
err = -EACCES;
goto err_sighand;
}
- task->signal->oom_score_adj = oom_score_adj;
+ task->signal->oom_score_adj = (short)oom_score_adj;
if (has_capability_noaudit(current, CAP_SYS_RESOURCE))
- task->signal->oom_score_adj_min = oom_score_adj;
+ task->signal->oom_score_adj_min = (short)oom_score_adj;
trace_oom_score_adj_update(task);
err_sighand:
@@ -1770,8 +1877,9 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
if (!vma)
goto out_no_vma;
- result = proc_map_files_instantiate(dir, dentry, task,
- (void *)(unsigned long)vma->vm_file->f_mode);
+ if (vma->vm_file)
+ result = proc_map_files_instantiate(dir, dentry, task,
+ (void *)(unsigned long)vma->vm_file->f_mode);
out_no_vma:
up_read(&mm->mmap_sem);
@@ -2458,6 +2566,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
@@ -2801,6 +2910,7 @@ static const struct pid_entry tid_base_stuff[] = {
REG("cgroup", S_IRUGO, proc_cgroup_operations),
#endif
INF("oom_score", S_IRUGO, proc_oom_score),
+ REG("oom_adj", S_IRUGO|S_IWUSR, proc_oom_adj_operations),
REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
#ifdef CONFIG_AUDITSYSCALL
REG("loginuid", S_IWUSR|S_IRUGO, proc_loginuid_operations),
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index 86c67eee439..e96d4f18ca3 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -249,7 +249,7 @@ static int kcore_update_ram(void)
/* Not inialized....update now */
/* find out "max pfn" */
end_pfn = 0;
- for_each_node_state(nid, N_HIGH_MEMORY) {
+ for_each_node_state(nid, N_MEMORY) {
unsigned long node_end;
node_end = NODE_DATA(nid)->node_start_pfn +
NODE_DATA(nid)->node_spanned_pages;
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index a781bdf0669..701580ddfcc 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -378,12 +378,13 @@ static int test_perm(int mode, int op)
return -EACCES;
}
-static int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
+static int sysctl_perm(struct ctl_table_header *head, struct ctl_table *table, int op)
{
+ struct ctl_table_root *root = head->root;
int mode;
if (root->permissions)
- mode = root->permissions(root, current->nsproxy, table);
+ mode = root->permissions(head, table);
else
mode = table->mode;
@@ -491,7 +492,7 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
* and won't be until we finish.
*/
error = -EPERM;
- if (sysctl_perm(head->root, table, write ? MAY_WRITE : MAY_READ))
+ if (sysctl_perm(head, table, write ? MAY_WRITE : MAY_READ))
goto out;
/* if that can happen at all, it should be -EINVAL, not -EISDIR */
@@ -717,7 +718,7 @@ static int proc_sys_permission(struct inode *inode, int mask)
if (!table) /* global root - r-xr-xr-x */
error = mask & MAY_WRITE ? -EACCES : 0;
else /* Use the permissions on the sysctl table entry */
- error = sysctl_perm(head->root, table, mask & ~MAY_NOT_BLOCK);
+ error = sysctl_perm(head, table, mask & ~MAY_NOT_BLOCK);
sysctl_head_finish(head);
return error;
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 90c63f9392a..48775628abb 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -643,7 +643,7 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
spinlock_t *ptl;
struct page *page;
- split_huge_page_pmd(walk->mm, pmd);
+ split_huge_page_pmd(vma, addr, pmd);
if (pmd_trans_unstable(pmd))
return 0;
@@ -1126,7 +1126,7 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
return NULL;
nid = page_to_nid(page);
- if (!node_isset(nid, node_states[N_HIGH_MEMORY]))
+ if (!node_isset(nid, node_states[N_MEMORY]))
return NULL;
return page;
@@ -1279,7 +1279,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
if (md->writeback)
seq_printf(m, " writeback=%lu", md->writeback);
- for_each_node_state(n, N_HIGH_MEMORY)
+ for_each_node_state(n, N_MEMORY)
if (md->node[n])
seq_printf(m, " N%d=%lu", n, md->node[n]);
out:
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 07:02:22 +0000