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

Dan Schatzberg
2023-11-30T19:51:02Z

On Thu, Nov 30, 2023 at 06:44:24PM +0000, Shakeel Butt wrote:
> [...]
> > * Swapout should be limited to manage SSD write endurance. In near-OOM
>
> Is this about swapout to SSD only?

Correct

> > situations we are fine with lots of swap-out to avoid OOMs. As these are
> > typically rare events, they have relatively little impact on write endurance.
> > However, proactive reclaim runs continuously and so its impact on SSD write
> > endurance is more significant. Therefore it is desireable to control swap-out
> > for proactive reclaim separately from reactive reclaim
>
> This is understandable but swapout to zswap should be fine, right?
> (Sorry I am not following the discussion on zswap patches from Nhat. Is
> the answer there?)

You're correct here as well - we're not concerned about swapout to
zswap as that does not impact SSD write endurance. This is not related
to Nhat's patches.