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From: Josef Bacik <>
Subject: [PATCH 1/2] fstests: make generic/500 xfs+ext4 only
Date: Thu, 15 Aug 2019 11:00:31 -0400
Message-ID: <> (raw)

I recently fixed some bugs in btrfs's enospc handling that made it start
failing generic/500.

The point of this test is to make the thin provisioned device run out of
space, which results in an EIO being seen on a device from the file
systems perspective.  This is fine for xfs and ext4 who's metadata is
being overwritten and already allocated on the thin provisioned device.
They get an EIO on data writes, fstrim to free up the space, and keep it

Btrfs however has dynamic metadata, so the rm -rf could result in
metadata IO being done on the file system.  Since the thin provisioned
device is out of space this gives us an EIO, and we flip read only.  We
didn't remove the file, so the fstrim doesn't recover space anyway, so
we can't even fstrim and remount.

Make this test for ext4/xfs only, it just simply won't work right for
btrfs in it's current form.

Signed-off-by: Josef Bacik <>
 tests/generic/500 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/generic/500 b/tests/generic/500
index 201d8b9f..1cbd9d65 100755
--- a/tests/generic/500
+++ b/tests/generic/500
@@ -44,7 +44,7 @@ _cleanup()
 rm -f $seqres.full
 # real QA test starts here
-_supported_fs generic
+_supported_fs xfs ext4
 _supported_os Linux
 _require_dm_target thin-pool

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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-15 15:00 Josef Bacik [this message]
2019-08-15 15:00 ` [PATCH 2/2] fstests: move generic/500 -> shared/001 Josef Bacik
2019-08-15 15:24 ` [PATCH 1/2] fstests: make generic/500 xfs+ext4 only Darrick J. Wong
2019-08-15 15:37   ` Josef Bacik

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