Re: [PATCH 01/31] mm: serialize access to min_free_kbytes

[David Rientjes]

On Thu, 1 Oct 2009, Suresh Jayaraman wrote:

> From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> 
> 
> There is a small race between the procfs caller and the memory hotplug caller
> of setup_per_zone_wmarks(). Not a big deal, but the next patch will add yet
> another caller. Time to close the gap.
> 

By "next patch," you mean "mm: emegency pool" (patch 08/31)?

If so, can't you eliminate var_free_mutex entirely from that patch and 
take min_free_lock in adjust_memalloc_reserve() instead?

 [ __adjust_memalloc_reserve() would call __setup_per_zone_wmarks()
   under lock instead, now. ]
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