Messages in this thread | | | Date | Wed, 24 Oct 2012 14:13:03 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] add some drop_caches documentation and info messsge |
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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.
Who owns hibernaton nowadays? Rafael, I guess?
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