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

[Borislav Petkov <bp@alien8.de>]

On Wed, Oct 31, 2012 at 06:31:54PM +0100, Pavel Machek wrote:
> Hmm? When I resume from hibernate, I want to use my machine.

Well, in my case with a workstation with 8 Gb, the only time the swapin
is noticeable is when I try to use firefox with a couple of dozens tabs
open. Once that thing is swapped in, system perf is back to normal.

I'll bet that even this slowdown would disappear if I use an SSD.

But I can imagine some workloads where swapping everything back in could
be discomforting.

> Kernel will not normally swap anything in automatically. Some people
> do swapoff -a; swapon -a to work around that. (And yes, maybe some
> automatic-swap-in-when-there's-plenty-of-RAM would be useful.).

That's a good idea, actually.

So, in any case, the current situation is fine as it is, I'd say: people
can decide whether they want to drop caches before suspending or not.
Problem solved.

Thanks.

-- 
Regards/Gruss,
    Boris.

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