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    SubjectRe: [PATCH] add some drop_caches documentation and info messsge
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    On Wednesday 24 of October 2012 14:13:03 Andrew Morton wrote:
    > On Wed, 24 Oct 2012 23:06:00 +0200
    > Borislav Petkov <bp@alien8.de> wrote:
    >
    > > On Wed, Oct 24, 2012 at 01:48:36PM -0700, Andrew Morton wrote:
    > > > Well who knows. Could be that people's vm *does* suck. Or they have
    > > > some particularly peculiar worklosd or requirement[*]. Or their VM
    > > > *used* to suck, and the drop_caches is not really needed any more but
    > > > it's there in vendor-provided code and they can't practically prevent
    > > > it.
    > >
    > > I have drop_caches in my suspend-to-disk script so that the hibernation
    > > image is kept at minimum and suspend times are as small as possible.
    >
    > hm, that sounds smart.
    >
    > > Would that be a valid use-case?
    >
    > I'd say so, unless we change the kernel to do that internally. We do
    > have the hibernation-specific shrink_all_memory() in the vmscan code.
    > We didn't see fit to document _why_ that exists, but IIRC it's there to
    > create enough free memory for hibernation to be able to successfully
    > complete, but no more.

    That's correct.

    > Who owns hibernaton nowadays? Rafael, I guess?

    I'm still maintaining it.

    Thanks,
    Rafael


    --
    I speak only for myself.
    Rafael J. Wysocki, Intel Open Source Technology Center.


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