On Sun, Feb 11, 2024 at 06:06:27PM +0100, Martin Steigerwald wrote:
> Hi Holger!
> 
> CC'ing BCacheFS mailing list.
> 
> My original mail is here:
> 
> https://lore.kernel.org/linux-usb/[email protected]/T/
> #m5ec9ecad1240edfbf41ad63c7aeeb6aa6ea38a5e
> 
> Holger Hoffstätte - 11.02.24, 17:02:29 CET:
> > On 2024-02-11 16:42, Martin Steigerwald wrote:
> > > Hi!
> > > I am trying to put data on an external Kingston XS-2000 4 TB SSD using
> > > self-compiled Linux 6.7.4 kernel and encrypted BCacheFS. I do not
> > > think BCacheFS has any part in the errors I see, but if you disagree 
> > > feel free to CC the BCacheFS mailing list as you reply.
> > 
> > This is indeed a known bug with bcachefs on USB-connected devices.
> > Apply the following commit:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commi
> > t/fs/bcachefs?id=3e44f325f6f75078cdcd44cd337f517ba3650d05
> > 
> > This and some other commits are already scheduled for -stable.
> 
> Thanks!
> 
> Oh my. I was aware of some bug fixes coming for stable. I briefly looked 
> through them, but now I did not make a connection.
> 
> I will wait for 6.7.5 and retry then I bet.

That doesn't look related - the device claims to not support flush or
fua, and the bug resulted in us not sending flush/fua devices; the main
thing people would see without that patch, on 6.8, would be an immediate
-EOPNOTSUP on the first flush journal write.

He only got errors after an hour or so, or 10 minutes with UAS disabled;
we send flushes once a second. Sounds like a screwy device.

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