Re: 230-objrmap fixes for 2.6.3-mjb2
From: Andrew Morton
Date: Fri Mar 26 2004 - 18:26:03 EST
Andrea Arcangeli <andrea@xxxxxxx> wrote:
> On Fri, Mar 26, 2004 at 11:57:23AM +0000, Hugh Dickins wrote:
> > Andrea's 2.6.5-rc2-aa4 (anon_vma): based on Martin's, but very
> > likely safe since it does not use find_vma at all in swapout, and
> > unuse_process downs mmap_sem as Martin's used to before.
> Hugh, thanks for the review! I also don't see locking bugs in this area
> in my tree and I like not to take the page_table_lock during vma
> manipulations since I don't seem to need it.
It would be really, really nice if we could clean this crap up. mmap_sem
protects the vma tree, i_shared_sem protects the per-address_space vma
lists and page_table_lock protects the pagetables.
Does this sound like something we can achieve?
(Could page_table_lock then become per-vma?)
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