Re: [OE-core] [PATCH] sstate: Add fallback when hardlink fails

[Michael Arndt <michael@rndt.dev>]

Hello Richard,

> The challenge is that the sstate directory is shared, so two builds can
> write to the same file at the same time. Our policy is "first wins" and
> anything later is just skipped. The code also needs to make sure that
> if the sstate file is written, the paired signature matches.

Thanks for taking a look at my change. I guess then there is no simple 
fix for the problem, because checking if the file exists and replacing 
it must be a single atomic operation. Without hardlinks that is a problem.

 > Generic try/except cases are almost always a red flag in general.

Agreed, that was also the reason why I was surprised that my sstate 
didn't work. The existing code already swallows the IOException from 
os.link so you don't see the error about the missing hardlink support.

I guess I will have to use a different file system, but thanks anyway.

Greetings,
Michael