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From: Amir Goldstein <>
To: Chris Murphy <>
Cc: Miklos Szeredi <>,
	overlayfs <>
Subject: Re: btrfs+overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off.
Date: Sun, 11 Apr 2021 08:12:23 +0300	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

[removing btrfs list]

On Sat, Apr 10, 2021 at 11:03 PM Chris Murphy <> wrote:
> Keeping everything else the same, and only reverting to kernel
> 5.9.16-200.fc33.x86_64, this kernel message
> >overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off
> no longer appears when I 'podman system reset' or when 'podman build'
> bolt, using the overlay driver.

I don't see a change in overlayfs that would explain seeing this warning
in v5.12 and not in v5.9 - on the contrary, in v5.12 the warning is printed
only if index or metacopy features have actually been requested.

So it must be a change in the upper fs, which is tmpfs?
Anyway, I don't have enough information and this seems unrelated
to the test failure, so I'll drop it.

> However, I do still get
> Bail out! ERROR:../tests/test-common.c:1413:test_io_dir_is_empty:
> 'empty' should be FALSE

Now I'm confused again.

Your reports starts by stating:
"The primary problem is Bolt (Thunderbolt 3) tests that are
experiencing a regression when run in a container using overlayfs,"

But you say that the problem exists with kernel 5.9.
When you say "regression" above, what are you referring to?

Did those tests pass in a previous Bolt version?
Did those tests ever pass in a container using overlayfs?

There is surely a bug in overlayfs, but it's hard to find it without
minimal bisection info. I'll keep looking.

If it's a regression with newer distro, please try to understand
from distro/package managers, what has changed in the container
setup and kernel config w.r.t a container using overlayfs.


  reply	other threads:[~2021-04-11  5:12 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-09 22:03 btrfs+overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off Chris Murphy
2021-04-10  8:03 ` Amir Goldstein
2021-04-10 17:36   ` Chris Murphy
2021-04-10 17:55     ` Amir Goldstein
2021-04-10 19:36       ` Chris Murphy
2021-04-10 19:42         ` Chris Murphy
2021-04-10 19:43           ` Chris Murphy
2021-04-10 19:44             ` Chris Murphy
2021-04-10 20:03               ` Chris Murphy
2021-04-11  5:12                 ` Amir Goldstein [this message]
2021-04-11  6:05                   ` Chris Murphy
2021-04-11  7:28                     ` Amir Goldstein
2021-04-13 21:50                       ` Chris Murphy
2021-04-12  8:41       ` Miklos Szeredi

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