Re: [PATCH 0/1] Add swappiness argument to memory.reclaim

Johannes Weiner
2023-11-30T19:40:03Z

On Thu, Nov 30, 2023 at 06:54:37PM +0000, Matthew Wilcox wrote:
> On Thu, Nov 30, 2023 at 06:44:24PM +0000, Shakeel Butt wrote:
> > On Thu, Nov 30, 2023 at 07:36:53AM -0800, Dan Schatzberg wrote:
> > > * Swapout should be limited to manage SSD write endurance. In near-OOM
> >
> > Is this about swapout to SSD only?
>
> If you're using spinning rust with its limit of, what, 200 seeks per
> second, I'd suggest that swapout should also be limited but for
> different reasons. We can set you up with a laptop with insufficient
> RAM and a 5400rpm drive if you'd like to be convinced ...

^_^

Yeah, we don't enable disk swap on the hard drive hosts that are
left. This aspect is only about write endurance management on SSD
during proactive reclaim.