Messages in this thread Patch in this message |  | | | Date | Tue, 6 Mar 2012 18:26:11 -0800 (PST) | | From | David Rientjes <> | | Subject | [patch] mm, hugetlb: add thread name and pid to SHM_HUGETLB mlock rlimit warning |
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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> --- fs/hugetlbfs/inode.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -946,7 +946,11 @@ 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);
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