Re: Re : Massive filesystem corruption since kernel 5.2 (ARCH)

[Qu Wenruo]

On 2019/8/27 下午4:35, sw...@petaramesh.org wrote:
> Hi Qu,
>
> Sorry for top-posting (my phone, uh...)
>
> I meant that I had understood that the V2 space cache was preferable to
> V1 only for multi-TB filesystems.
>
> So would you advise to use V2 space cache also for filesystems < 1 TB ?

Sorry, I'm not that familiar with space cache/tree code to do any
recommendation based on code.

My recommendation is, disable space cache if in doubt. Simple and
straightforward.

Thanks,
Qu
>
> TIA.
>
> Kind regards.
>
>
>
> -------- Message original --------
> Objet : Re: Massive filesystem corruption since kernel 5.2 (ARCH)
> De : Qu Wenruo
> À : Swâmi Petaramesh ,linux-btrfs@vger.kernel.org
> Cc : Christoph Anton Mitterer
>
>
>     > or to use the V2 space
>     > cache generally speaking, on any machine that I use (I had
>     understood it
>     > was useful only on multi-TB filesystems...)
>
>     10GiB is enough to create large enough block groups to utilize free
>     space cache.
>     So you can't really escape from free space cache.
>