On Tue, Sep 04, 2012 at 04:39:49PM -0700, Michel Lespinasse wrote: > This change fixes an anon_vma locking issue in the following situation: > - vma has no anon_vma > - next has an anon_vma > - vma is being shrunk / next is being expanded, due to an mprotect call > > We need to take next's anon_vma lock to avoid races with rmap users > (such as page migration) while next is being expanded. > > Signed-off-by: Michel Lespinasse <walken@xxxxxxxxxx> Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>