Commit 21a3c273 authored Mar 21, 2012 by David Rientjes Committed by Linus Torvalds Mar 21, 2012

mm, hugetlb: add thread name and pid to SHM_HUGETLB mlock rlimit warning



Add the thread name and pid of the application that is allocating shm
segments with MAP_HUGETLB without being a part of
/proc/sys/vm/hugetlb_shm_group or having CAP_IPC_LOCK.

This identifies the application so it may be fixed by avoiding using the
deprecated exception (see Documentation/feature-removal-schedule.txt).

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent ea48cf78

fs/hugetlbfs/inode.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -953,7 +953,11 @@ struct file hugetlb_file_setup(const char name, size_t size,
		if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
		*user = current_user();
		if (user_shm_lock(size, *user)) {
		printk_once(KERN_WARNING "Using mlock ulimits for SHM_HUGETLB is deprecated\n");
		task_lock(current);
		printk_once(KERN_WARNING
		"%s (%d): Using mlock ulimits for SHM_HUGETLB is deprecated\n",
		current->comm, current->pid);
		task_unlock(current);
		} else {
		*user = NULL;
		return ERR_PTR(-EPERM);