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Re: CVS commit: src/sys/uvm

"Matt Thomas" <> wrote:
> Module Name:  src
> Committed By: matt
> Date:         Mon Sep  3 19:53:43 UTC 2012
> Modified Files:
>       src/sys/uvm: uvm_km.c uvm_map.c
> Log Message:
> Switch to a spin lock (uvm_kentry_lock) which, fortunately, was sitting
> there unused.

- pmap_growkernel() may use adaptive locks, which cannot be acquired with
  the spin lock held; so the change breaks at least x86 and alpha.

- Why in the caller?  I think it would be better do leave it for the pmaps,
  e.g. they may re-use the locks which already provide the necessary
  protection and which need to be taken anyway (like in x86 pmap).


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