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From b89a1a9d19aa806feb984c8dba25116b5b5a52bc Mon Sep 17 00:00:00 2001
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From: HATAYAMA Daisuke <d.hatayama@fujitsu.com>
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Date: Wed, 24 Jul 2019 23:54:48 -0400
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Subject: [PATCH] swap: finish the secondary swap units' jobs if deactivation
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of the primary swap unit fails
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Currently, if deactivation of the primary swap unit fails:
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# LANG=C systemctl --no-pager stop dev-mapper-fedora\\x2dswap.swap
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Job for dev-mapper-fedora\x2dswap.swap failed.
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See "systemctl status "dev-mapper-fedora\\x2dswap.swap"" and "journalctl -xe" for details.
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then there are still the running stop jobs for all the secondary swap units
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that follow the primary one:
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# systemctl list-jobs
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JOB UNIT TYPE STATE
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3233 dev-disk-by\x2duuid-2dc8b9b1\x2da0a5\x2d44d8\x2d89c4\x2d6cdd26cd5ce0.swap stop running
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3232 dev-dm\x2d1.swap stop running
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3231 dev-disk-by\x2did-dm\x2duuid\x2dLVM\x2dyuXWpCCIurGzz2nkGCVnUFSi7GH6E3ZcQjkKLnF0Fil0RJmhoLN8fcOnDybWCMTj.swap stop running
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3230 dev-disk-by\x2did-dm\x2dname\x2dfedora\x2dswap.swap stop running
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3234 dev-fedora-swap.swap stop running
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5 jobs listed.
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This remains endlessly because their JobTimeoutUSec is infinity:
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# LANG=C systemctl show -p JobTimeoutUSec dev-fedora-swap.swap
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JobTimeoutUSec=infinity
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If this issue happens during system shutdown, the system shutdown appears to
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get hang and the system will be forcibly shutdown or rebooted 30 minutes later
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by the following configuration:
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# grep -E "^JobTimeout" /usr/lib/systemd/system/reboot.target
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JobTimeoutSec=30min
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JobTimeoutAction=reboot-force
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The scenario in the real world seems that there is some service unit with
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KillMode=none, processes whose memory is being swapped out are not killed
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during stop operation in the service unit and then swapoff command fails.
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On the other hand, it works well in successful case of swapoff command because
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the secondary jobs monitor /proc/swaps file and can detect deletion of the
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corresponding swap file.
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This commit fixes the issue by finishing the secondary swap units' jobs if
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deactivation of the primary swap unit fails.
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Fixes: #11577
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(cherry picked from commit 9c1f969d40f84d5cc98d810bab8b24148b2d8928)
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Resolves: #1749622
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---
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src/core/swap.c | 10 ++++++++--
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1 file changed, 8 insertions(+), 2 deletions(-)
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diff --git a/src/core/swap.c b/src/core/swap.c
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index e717dbb54a..66a62d8a37 100644
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--- a/src/core/swap.c
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+++ b/src/core/swap.c
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@@ -682,9 +682,15 @@ static void swap_enter_active(Swap *s, SwapResult f) {
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static void swap_enter_dead_or_active(Swap *s, SwapResult f) {
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assert(s);
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- if (s->from_proc_swaps)
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+ if (s->from_proc_swaps) {
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+ Swap *other;
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+
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swap_enter_active(s, f);
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- else
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+
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+ LIST_FOREACH_OTHERS(same_devnode, other, s)
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+ if (UNIT(other)->job)
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+ swap_enter_dead_or_active(other, f);
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+ } else
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swap_enter_dead(s, f);
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}
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