On Mon, Aug 08, 2005 at 05:14:45PM +0300, Pekka J Enberg wrote:
if (!dumping)
down_read(&mm->mmap_sem);
> >+
> >+ for (vma = find_vma(mm, start); vma; vma = vma->vm_next) {
> >+ if (end <= vma->vm_start)
> >+ break;
> >+ if (vma->vm_file &&
> >+ vma->vm_file->f_dentry->d_inode->i_sb == sb) {
> >+ num_gh++;
> >+ }
> >+ }
> >+
> >+ ghs = kmalloc((num_gh + 1) * sizeof(struct gfs2_holder),
> >+ GFP_KERNEL);
> >+ if (!ghs) {
> >+ if (!dumping)
> >+ up_read(&mm->mmap_sem);
> >+ return -ENOMEM;
> >+ }
> >+
> >+ for (vma = find_vma(mm, start); vma; vma = vma->vm_next) {
>
> Sorry if this is an obvious question but what prevents another thread from
> doing mmap() before we do the second walk and messing up num_gh?
mm->mmap_sem ?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
| |
 |