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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1748017855; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=EiRD1Rvo5qlgffSZ3bR6VrSUTKIKB+PJh+sKyKvmYj4=; b=JoPsf/gJvMD+AZntpr/U11OGhVwiMPodrMHEER26u1qP3ixbicpYs0YQcETnbdSonhKL+t PUWLpBBlXkmQmcJ5iYTspYCz0Xt4OkuCrYWoROgan9hRakfZOql9gaihu/Zv6GKhHj1ELD C9fmnz/+67TUCbVYiH5rmi+CmT1TqA0= X-MC-Unique: 60n3V470Nfq7QS-vedKF5A-1 X-Mimecast-MFC-AGG-ID: 60n3V470Nfq7QS-vedKF5A_1748017851 From: Eric Blake To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, f.ebner@proxmox.com, Kevin Wolf , Hanna Reitz Subject: [PATCH v2 2/3] iotests: Improve mirror-sparse on ext4 Date: Fri, 23 May 2025 11:27:22 -0500 Message-ID: <20250523163041.2548675-7-eblake@redhat.com> In-Reply-To: <20250523163041.2548675-5-eblake@redhat.com> References: <20250523163041.2548675-5-eblake@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" Fiona reported that an ext4 filesystem on top of LVM can sometimes report over-allocation to du (based on the hueristics the filesystem is making while observing the contents being mirrored); even though the contents and actual size matched, about 50% of the time the size reported by disk_usage was too large by 4k, failing the test. In auditing other iotests, this is a common problem we've had to deal with. Reported-by: Fiona Ebner Fixes: c0ddcb2c ("tests: Add iotest mirror-sparse for recent patches") Signed-off-by: Eric Blake Reviewed-by: Fiona Ebner Tested-by: Fiona Ebner --- v2: Drop sync for ZFS --- tests/qemu-iotests/tests/mirror-sparse | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tests/qemu-iotests/tests/mirror-sparse b/tests/qemu-iotests/te= sts/mirror-sparse index 8c52a4e2448..338d6cfbb35 100755 --- a/tests/qemu-iotests/tests/mirror-sparse +++ b/tests/qemu-iotests/tests/mirror-sparse @@ -96,10 +96,12 @@ _send_qemu_cmd $h1 '{"execute": "blockdev-del", "argume= nts": {"node-name": "dst"}}' 'return' \ | _filter_block_job_offset | _filter_block_job_len $QEMU_IMG compare -U -f $IMGFMT -F raw $TEST_IMG.base $TEST_IMG +# Some filesystems can fudge allocations for various reasons; rather +# than expecting precise 2M and 20M images, it is better to allow for slop. result=3D$(disk_usage $TEST_IMG) if test $result -lt $((3*1024*1024)); then actual=3Dsparse -elif test $result =3D $((20*1024*1024)); then +elif test $result -gt $((19*1024*1024)); then actual=3Dfull else actual=3Dunknown --=20 2.49.0