From: Anton <anton.khazan@gmail.com>
To: netfilter@vger.kernel.org
Subject: What happens if the machine runs out of memory while adding new nftables sets atomically?
Date: Tue, 6 Feb 2024 12:47:19 +0200 [thread overview]
Message-ID: <CAJE3=wmUcJ0E8nobG=T084XkiEK9UUgR4kyfLHk2enZOunH_1A@mail.gmail.com> (raw)
Hi folks,
While experimenting with adding nftables sets on memory-constrained
devices, I have run into OOM conditions. Currently many embedded
devices such as routers are balancing on the verge of not enough
memory if using nft sets (at least interval sets).
I know that there has been progress on the front of reducing memory
footprint, but it's not yet in the nftables versions supplied by the
distributions, so for now I have to work with the current state of
things.
To be on the safe side, currently my scripts add sets separately from
adding rules and removing sets. I'd like to ask the devs, is it safe
under these conditions to attempt performing all these actions in one
atomic operation? Is previous firewall configuration guaranteed to be
successfully restored if the operation runs into OOM?
next reply other threads:[~2024-02-06 10:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-06 10:47 Anton [this message]
2024-02-06 11:12 ` What happens if the machine runs out of memory while adding new nftables sets atomically? Florian Westphal
2024-02-06 12:15 ` Anton
2024-02-06 12:15 ` Anton
2024-02-06 12:18 ` Florian Westphal
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