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-rw-r--r--fs/proc/task_mmu.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 442177b..2101ce4 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -737,9 +737,6 @@ static inline void clear_soft_dirty(struct vm_area_struct *vma,
ptent = pte_file_clear_soft_dirty(ptent);
}
- if (vma->vm_flags & VM_SOFTDIRTY)
- vma->vm_flags &= ~VM_SOFTDIRTY;
-
set_pte_at(vma->vm_mm, addr, pte, ptent);
#endif
}
@@ -807,8 +804,9 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
if (type == CLEAR_REFS_SOFT_DIRTY) {
soft_dirty_cleared = true;
- pr_warn_once("The pagemap bits 55-60 has changed their meaning! "
- "See the linux/Documentation/vm/pagemap.txt for details.\n");
+ pr_warn_once("The pagemap bits 55-60 has changed their meaning!"
+ " See the linux/Documentation/vm/pagemap.txt for "
+ "details.\n");
}
task = get_proc_task(file_inode(file));
@@ -839,11 +837,17 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
*
* Writing 3 to /proc/pid/clear_refs only affects file
* mapped pages.
+ *
+ * Writing 4 to /proc/pid/clear_refs affects all pages.
*/
if (type == CLEAR_REFS_ANON && vma->vm_file)
continue;
if (type == CLEAR_REFS_MAPPED && !vma->vm_file)
continue;
+ if (type == CLEAR_REFS_SOFT_DIRTY) {
+ if (vma->vm_flags & VM_SOFTDIRTY)
+ vma->vm_flags &= ~VM_SOFTDIRTY;
+ }
walk_page_range(vma->vm_start, vma->vm_end,
&clear_refs_walk);
}
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