this post was submitted on 24 Mar 2026
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Linux Gaming

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[–] TheTechnician27@lemmy.world 18 points 14 hours ago* (last edited 14 hours ago) (3 children)

Gamers who use fsync are not going to see such a leap in performance in most games.

I don't think that's overlooked at all. 99.9% of people using WINE/Proton aren't going to have any idea what fsync is, and almost nobody not using proton-cachyos is going to use it. fsync, itself a workaround, is niche within what's already a niche.

[–] SmoochyPit@lemmy.ca 20 points 14 hours ago (1 children)

From what I found online, Steam enables esync by default, and fsync if your kernel supports it.

Lutris has both options nowadays in the runner settings. Idk if they’re both enabled by default, but in my case they’re enabled. ymmv there.

source

[–] grue@lemmy.world 5 points 13 hours ago (1 children)

What are the kernel requirements? Is it something any random Debian user is likely to have, or do you need to be compiling it yourself?

[–] SmoochyPit@lemmy.ca 6 points 12 hours ago (1 children)

From the article:

Futex2, often referred to interchangeably with fsync, did make it to Linux kernel 5.16 as futex_waitv, but the original implementation of fsync isn't that. Fsync used futex_wait_multiple, and Futex2 used futex_waitv. Applications such as Lutris still refer to it as Fsync, though. It's still kind of fsync, but it's not the original fsync.

So since Jan 2022, it’s been in the stable Linux kernel. For Debian and its derivatives, it would be included beginning with Bookworm.

[–] grue@lemmy.world 8 points 12 hours ago (1 children)

So basically, both esync and fsync are enabled by default for almost everybody.

[–] SmoochyPit@lemmy.ca 5 points 12 hours ago

Assuming that most non-technical users (who wouldn’t research and enable it) are probably using Wine/Proton through Steam: yeah.

[–] kieron115@startrek.website 5 points 14 hours ago

i use ntsync whenever i can, but i've only had linux (cachyos) on my gaming rig since like august. that said, i believe one of their recent updates made ntsync the default for proton-cachyos

[–] INeedMana@piefed.zip 5 points 14 hours ago (1 children)

Fsync maybe not but AFAIK esync is widely used. On some protondb pages there's a hint to disable esync, not the other way round. And while esync is not as performant as fsync, it is still much better than vanilla

[–] Quetzalcutlass@lemmy.world 11 points 14 hours ago* (last edited 14 hours ago)

It's worth noting that the new sync implementation shouldn't cause any of the compatibility problems esync and fsync ran into, so it's a worthwhile upgrade from a stability viewpoint even if a user won't see huge performance gains.