-* journal: setting MaxRetentionSec= to any value creates a /dev/kmsg loop:
- epoll_wait(7, {?} 0x7fff220df200, 1, 799489421) = 1
- read(8, "46,156226155,545165984,-;systemd"..., 8192) = 75
- writev(6, [{"<46>", 4}, {"systemd-journald", 16}, {"[3822]: ", 8}, {"Sleeping for 799489421 ms", 25}, {"\n", 1}], 5) = 54
- epoll_wait(7, {?} 0x7fff220df200, 1, 799489421) = 1
- read(8, "46,156226156,545166076,-;systemd"..., 8192) = 75
- writev(6, [{"<46>", 4}, {"systemd-journald", 16}, {"[3822]: ", 8}, {"Sleeping for 799489421 ms", 25}, {"\n", 1}], 5) = 54
- epoll_wait(7, {?} 0x7fff220df200, 1, 799489421) = 1
- https://bbs.archlinux.org/viewtopic.php?pid=1200373
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