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From 434b4b64d17e16ed23f90c99c26dbd0e4ce6cd88 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Wed, 24 Nov 2021 15:58:50 +0100
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Subject: [PATCH] test: make test-execute pass on Linux 5.15
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Linux 5.15 broke kernel API:
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https://github.com/torvalds/linux/commit/e70344c05995a190a56bbd1a23dc2218bcc8c924
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Previously setting IOPRIO_CLASS_NONE for a process would then report
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IOPRIO_CLASS_NONE back. But since 5.15 it reports IOPRIO_CLASS_BE
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instead. Since IOPRIO_CLASS_NONE is an alias for a special setting of
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IOPRIO_CLASS_BE this makes some sense, but it's also a kernel API
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breakage that our testsuite trips up on.
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(I made some minimal effort to inform the kernel people about this API
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breakage during the 5.15 rc phase, but noone was interested.)
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Either way let's hadle this gracefully in our test suite and accept
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"best-effort" too when "none" was set.
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(This is only triggable if the tests are run on 5.15 with full privs)
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(cherry picked from commit d9b8771108cf2955efc3852b477391017d2c599a)
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Related: #2087152
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---
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test/test-execute/exec-ioschedulingclass-none.service | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/test/test-execute/exec-ioschedulingclass-none.service b/test/test-execute/exec-ioschedulingclass-none.service
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index b6af122a1e..8f917d345d 100644
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--- a/test/test-execute/exec-ioschedulingclass-none.service
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+++ b/test/test-execute/exec-ioschedulingclass-none.service
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@@ -2,6 +2,7 @@
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Description=Test for IOSchedulingClass=none
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[Service]
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-ExecStart=/bin/sh -x -c 'c=$$(LC_ALL=C ionice); test "$${c%%:*}" = "none"'
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+# Old kernels might report "none" here, new kernels "best-effort".
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+ExecStart=/bin/sh -x -c 'c=$$(LC_ALL=C ionice); test "$${c%%:*}" = "none" -o "$${c%%:*}" = "best-effort"'
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Type=oneshot
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IOSchedulingClass=none
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