---

yaml
---
r: 139149
b: refs/heads/master
c: 2584e51
h: refs/heads/master
i:
  139147: 1659dbd
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8a0bdec194c21c8fdef840989d0d7b742bb5d4bc
+refs/heads/master: 2584e517320bd48dc8d20e38a2621a2dbe58fade

trunk/Documentation/feature-removal-schedule.txt

@@ -311,6 +311,18 @@ Who:	Vlad Yasevich <vladislav.yasevich@hp.com>
 
 ---------------------------
 
+What:	Ability for non root users to shm_get hugetlb pages based on mlock
+	resource limits
+When:	2.6.31
+Why:	Non root users need to be part of /proc/sys/vm/hugetlb_shm_group or
+	have CAP_IPC_LOCK to be able to allocate shm segments backed by
+	huge pages.  The mlock based rlimit check to allow shm hugetlb is
+	inconsistent with mmap based allocations.  Hence it is being
+	deprecated.
+Who:	Ravikiran Thirumalai <kiran@scalex86.org>
+
+---------------------------
+
 What:	CONFIG_THERMAL_HWMON
 When:	January 2009
 Why:	This option was introduced just to allow older lm-sensors userspace

trunk/fs/hugetlbfs/inode.c

@@ -949,6 +949,7 @@ static int can_do_hugetlb_shm(void)
 struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag)
 {
 	int error = -ENOMEM;
+	int unlock_shm = 0;
 	struct file *file;
 	struct inode *inode;
 	struct dentry *dentry, *root;
@@ -958,8 +959,14 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag)
 	if (!hugetlbfs_vfsmount)
 		return ERR_PTR(-ENOENT);
 
-	if (!can_do_hugetlb_shm())
-		return ERR_PTR(-EPERM);
+	if (!can_do_hugetlb_shm()) {
+		if (user_shm_lock(size, user)) {
+			unlock_shm = 1;
+			WARN_ONCE(1,
+			  "Using mlock ulimits for SHM_HUGETLB deprecated\n");
+		} else
+			return ERR_PTR(-EPERM);
+	}
 
 	root = hugetlbfs_vfsmount->mnt_root;
 	quick_string.name = name;
@@ -999,6 +1006,8 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag)
 out_dentry:
 	dput(dentry);
 out_shm_unlock:
+	if (unlock_shm)
+		user_shm_unlock(size, user);
 	return ERR_PTR(error);
 }