Re: [PATCH] add some drop_caches documentation and info messsge

[Dave Hansen]

On 10/24/2012 03:48 PM, Borislav Petkov wrote:
> On Wed, Oct 24, 2012 at 02:18:38PM -0700, Dave Hansen wrote:
>> Sounds fairly valid to me. But, it's also one that would not be harmed
>> or disrupted in any way because of a single additional printk() during
>> each suspend-to-disk operation.
> 
> back to the drop_caches patch. How about we hide the drop_caches
> interface behind some mm debugging option in "Kernel Hacking"? Assuming
> we don't need it otherwise on production kernels. Probably make it
> depend on CONFIG_DEBUG_VM like CONFIG_DEBUG_VM_RB or so.
> 
> And then also add it to /proc/vmstat, in addition.

That effectively means removing it from the kernel since distros ship
with those config options off.  We don't want to do that since there
_are_ valid, occasional uses like benchmarking that we want to be
consistent.

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