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