Re: [PATCH 2.5.66-mm2] Fix page_convert_anon locking issues

[Hugh Dickins]

On Wed, 2 Apr 2003, Dave McCracken wrote:
> --On Wednesday, April 02, 2003 15:09:03 -0800 Andrew Morton
> <[e-mail]> wrote:
> > 
> > How about setting PageAnon at the _start_ of the operation? 
> > page_remove_rmap() will cope with that OK.
> 
> Hmm... I was gonna say that page_remove_rmap will BUG() if it doesn't find
> the entry, but it's only under DEBUG and could easily be changed.  Lemme
> think on this one a bit.  I need to assure myself it's safe to go unlocked
> in the middle.

Yes, it's an interesting idea, but by no means clear it's safe.
I'll think about it too, but sorry, no more tonight.

Hugh