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

[Dan Schatzberg]

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.