Re: Kernel 5.4 - BTRFS FS shows full with about 600 GB Free ?

Swâmi Petaramesh
2019-12-22T09:06:03Z

Hi again,

Le 22/12/2019 à 09:12, Qu Wenruo a écrit :
> So if you have enough uncommitted metadata, that check will be triggered
> and suddenly returns 0 available space, even 1 sec early you still get
> tons of available space.

With « uncommitted metadata » do you mean that this situation is only
temporary and should end once all transactions are commited to disk ?

Because in the one disk on which I observe this (and which passes a full
btrfs check with bells and whistles) it still shows 0% free after 2 days
and several unmounts / remounts...

Furthermore I've conected it to machines using 5.3 and even 4.15
kernels, and they *ALL* state that the free disk space is zero - even
though I can understand if « That check is from 2015 ».

That still seems to boild down to : Once I got this error it seems I
cannot step out of it using any reasonably recent kernel.

So I may have either to patch my kernel or wait for the patch to reach
#Arch kernels... and hope it actually fixes it.

(I have to admit that I haven't yet fully understood the technical
aspects of this overcommit story...)

I'm also worried that on my machines that does NOT show this problem on
their own main filesystems, this could happen anytime soon ?

Thanks anyway very much for your help.

Kind regards.

ॐ

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