Messages in this thread | | | Date | Mon, 10 May 2010 21:56:55 -0700 (PDT) | From | Jose Luis Marchetti <> | Subject | What locks are needed to safely use vma->vm_file ? |
| |
Hi,
It appears that doing down_read(&mm->mmap_sem) is enough to safely use vma->vm_file, is it correct ?
Also in the lock subject, to get to all vm_files in the system, is the following correct or something is missing ?
read_lock(&tasklist_lock); for_each_process(p) { mm = get_task_mm(p); down_read(&mm->mmap_sem);
// ... Here what I need to do with this mm vm_file objects
up_read(&mm->mmap_sem); mmput(mm); } read_unlock(&tasklist_lock);
Thanks in advance for your answer José Luís Marchetti
-- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |