Re: [PATCH v2] mm: Downgrade mmap_sem before locking or populatingon mmap

[Ingo Molnar]

* Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:

> > 2)
> >
> > More aggressively, we could just make it the _rule_ that the 
> > mm lock gets downgraded to read in mmap_region_helper(), no 
> > matter what.
> >
> > From a quick look I *think* all the usage sites (including 
> > sys_aio_setup()) are fine with that unlocking - but I could 
> > be wrong.
> 
> They are.

Lets try that then - the ugliness of the current patch is 
certainly a problem.

Thanks,

	Ingo
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