[kwlug-disc] Encrypted disk vs Encrypted Home

[Ron Singh]

As I am running SSDs and 8G/16G RAM in these laptops, I set Swappiness = 1.
My mem commit rarely goes beyond 5G of RAM, but just to be 100% careful, I
do have a 4G swap space in place as a just-in-case.

And yeah, so many times we have made Dual-Xeon-based workstations so much
quieter by re-pasting and even rip/replace stock HS with 6-pipe heatpipe
ones from various mfgs, makes a huge difference.

Thanks,

Ron S.



On Sun, Apr 26, 2020 at 2:36 AM Ronald Barnes <ron at ronaldbarnes.ca> wrote:

> Ron Singh wrote on 2020-04-25 10:39 a.m.:
>
> > Nope on the disk I/O  -pedestrian use really, spreadsheets, text editor,
> > FF with a fair # of tabs(45-55).
>
> Just throwing a thought out there, but what about swap file access?
> It's a reach, but if there's a lot of swapping, even to SSD, maybe
> there's a clue?
>
> # swapon --show
>
>
> > All of the TPs have been re-pasted
> > recently with Thermaltake kick-butt diamond-powder-infused(marketing
> > 101!) paste, all are running with Samsung 860 SSDs, so pretty sure they
> > are as identical as can be.
> >
> >>     Any ideas on how to get that Encryted Disk temps down? I have the
> >>     CPU locked down at 1.2Ghz max(from 2.6Ghz), unused ports go to
> >>     sleep, running an SSD, fan is set  for aggressive blowing to
> >>     reduce internal chassis temp.
> >
> >     I've reverted back to just standard Fedora config at this point. I
> >     see thermald is running, but I don't have TLP installed anymore.
> >
> >     I do appear to be on the powersave governor, though I'm not sure
> >     why/how that was set. I'm somewhat surprised it wasn't ondemand...
> >
> >     I believe there is a UEFI setting for system performance (on
> >     battery, on ac, etc), but couldn't tell you what mine is set to.
> >
> > Hubert has a great idea in trying various kernels, I start that process
> > tomorrow.
> >
> > An FYI, before re-pasting, these X220/T520 devices with unencrypted SSDs
> > were idling @ 2%-4% CPU @ 39C-40C and the fan at around 2650-2992RPM.
> > After re-pasting with that mondo-uber-fab Thermaltake TG-8 paste, idling
> > and temps remained the same, but fan went down to 1992-2050RPM. The fan
> > can barely be heard on the unencrypted X220 and T520 with their fans
> > around 2000RPM. Neat, eh?
>
> That *is* neat.
>
> I've got a Dell PowerEdge screaming like a 747 in a spare room and one
> CPU is about 10°C warmer than the other, all the time.
>
> I might just look into repasting it, that's really a good idea.
>
>
> Thanks!
>
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