Hi Yosry, On Donnerstag, 2. März 2023 20:12:43 CET Yosry Ahmed wrote: > On Thu, Mar 2, 2023 at 11:01 AM Jonas Schäfer <jonas@xxxxxxxxxxxxx> wrote: > > Hi there, > > > > By coincidence, I found this log message in my kernel logs: > > > > Mär 02 17:23:19 sinistra kernel: The swapaccount= commandline option is > > deprecated. Please report your usecase to linux-mm@xxxxxxxxx if you depend > > on this functionality. > > > > My usecase does depend on this in the following way: > > > > I use LXC extensively to isolate workloads from one another. Kind of like > > docker, but with full operating systems inside. > > > > Before I found out about swapaccount, I often ran into the issue that one > > misbehaving workload from one of those containers would bring the entire > > machine to a halt because it occupied lots of swap, and thus triggered > > significant slowdown. > > > > With swapaccount, I limit swap to about 10% of the RAM assigned to the > > containers. This allows them to swap out unused stuff, but invokes the OOM > > killer before any significant slowdown happens. > > > > The alternative would be to turn off swap for the system entirely, but it > > is running fairly efficiently thanks to swapping stuff out. > > > > I'd be interested to hear about alternatives. > > > > Thanks for hearing me, anyway. > > If I understand correctly you were setting swapaccount=1, right? > > IIRC, swapaccount= was deprecated in the sense that it is always on > now (i.e you cannot set swapaccount=0). Thank you for the swift reply. Indeed, I am using swapaccount=1, so I assumed the deprecation warning was related to =1. If =1 continues to work as default, that just means I have one less thing to carry around in the grub config and is not a problem at all! Thanks! kind regards, Jonas
