Re: [PATCH] Remove page_table_lock from vma manipulations

[Hugh Dickins]

On Wed, 4 Jun 2003, Dave McCracken wrote:
> 
> Gah.  I don't know how I convinced myself that code was safe.  It's easily
> fixed.  How does this one look?

I think you have to keep page_table_lock in expand_stack (GROWSUP and
down versions) because that is called with only down_read on mmap_sem,
so two could be racing: nothing else protects the various vma field
adjustments there.  Otherwise appears correct to me.  Beneficial?

Hugh