diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 465be962f7b1..ba47e14dd6a9 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -12,6 +12,7 @@
 #include <linux/swap.h>
 #include <linux/swapops.h>
 #include <linux/mm_inline.h>
+#include <linux/ctype.h>
 
 #include <asm/elf.h>
 #include <asm/uaccess.h>
@@ -1227,11 +1228,14 @@ static ssize_t reclaim_write(struct file *file, const char __user *buf,
 				size_t count, loff_t *ppos)
 {
 	struct task_struct *task;
-	char buffer[PROC_NUMBUF];
+	char buffer[200];
 	struct mm_struct *mm;
 	struct vm_area_struct *vma;
 	enum reclaim_type type;
 	char *type_buf;
+	struct mm_walk reclaim_walk = {};
+	unsigned long start = 0;
+	unsigned long end = 0;
 
 	memset(buffer, 0, sizeof(buffer));
 	if (count > sizeof(buffer) - 1)
@@ -1247,42 +1251,93 @@ static ssize_t reclaim_write(struct file *file, const char __user *buf,
 		type = RECLAIM_ANON;
 	else if (!strcmp(type_buf, "all"))
 		type = RECLAIM_ALL;
+	else if (isdigit(*type_buf))
+		type = RECLAIM_RANGE;
 	else
-		return -EINVAL;
+		goto out_err;
+
+	if (type == RECLAIM_RANGE) {
+		char *token;
+		unsigned long long len, len_in, tmp;
+		token = strsep(&type_buf, " ");
+		if (!token)
+			goto out_err;
+		tmp = memparse(token, &token);
+		if (tmp & ~PAGE_MASK || tmp > ULONG_MAX)
+			goto out_err;
+		start = tmp;
+
+		token = strsep(&type_buf, " ");
+		if (!token)
+			goto out_err;
+		len_in = memparse(token, &token);
+		len = (len_in + ~PAGE_MASK) & PAGE_MASK;
+		if (len > ULONG_MAX)
+			goto out_err;
+		/*
+		 * Check to see whether len was rounded up from small -ve
+		 * to zero.
+		 */
+		if (len_in && !len)
+			goto out_err;
+
+		end = start + len;
+		if (end < start)
+			goto out_err;
+	}
 
 	task = get_proc_task(file->f_path.dentry->d_inode);
 	if (!task)
 		return -ESRCH;
 
 	mm = get_task_mm(task);
-	if (mm) {
-		struct mm_walk reclaim_walk = {
-			.pmd_entry = reclaim_pte_range,
-			.mm = mm,
-		};
+	if (!mm)
+		goto out;
+
+	reclaim_walk.mm = mm;
+	reclaim_walk.pmd_entry = reclaim_pte_range;
+
+	down_read(&mm->mmap_sem);
+	if (type == RECLAIM_RANGE) {
+		vma = find_vma(mm, start);
+		while (vma) {
+			if (vma->vm_start > end)
+				break;
+			if (is_vm_hugetlb_page(vma))
+				continue;
 
-		down_read(&mm->mmap_sem);
-		for (vma = mm->mmap; vma; vma = vma->vm_next) {
 			reclaim_walk.private = vma;
-
+			walk_page_range(max(vma->vm_start, start),
+					min(vma->vm_end, end),
+					&reclaim_walk);
+			vma = vma->vm_next;
+		}
+	} else {
+		for (vma = mm->mmap; vma; vma = vma->vm_next) {
 			if (is_vm_hugetlb_page(vma))
 				continue;
 
 			if (type == RECLAIM_ANON && vma->vm_file)
 				continue;
+
 			if (type == RECLAIM_FILE && !vma->vm_file)
 				continue;
 
+			reclaim_walk.private = vma;
 			walk_page_range(vma->vm_start, vma->vm_end,
-					&reclaim_walk);
+				&reclaim_walk);
 		}
-		flush_tlb_mm(mm);
-		up_read(&mm->mmap_sem);
-		mmput(mm);
 	}
-	put_task_struct(task);
 
+	flush_tlb_mm(mm);
+	up_read(&mm->mmap_sem);
+	mmput(mm);
+out:
+	put_task_struct(task);
 	return count;
+
+out_err:
+	return -EINVAL;
 }
 
 const struct file_operations proc_reclaim_operations = {
diff --git a/mm/Kconfig b/mm/Kconfig
index 38f266600cba..09378cf8414e 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -565,4 +565,7 @@ config PROCESS_RECLAIM
 	 (echo anon > /proc/PID/reclaim) reclaims anonymous pages only.
 	 (echo all > /proc/PID/reclaim) reclaims all pages.
 
+	 (echo addr size-byte > /proc/PID/reclaim) reclaims pages in
+	 (addr, addr + size-bytes) of the process.
+
 	 Any other vaule is ignored.