[systemd-devel] journalctl --follow broken

[Zbigniew Jędrzejewski-Szmek]

Hi,

today I noticed that journalctl --follow seems to print out much more
than 10 lines. Actually, aftern printing 10 lines correctly, it jump
to some point in the past:

Logs begin at Sat, 13 Oct 2012 06:13:18 +0000.
Nov 01 11:09:26 fedora-15 sshd[29669]: pam_unix(sshd:session): session clos...ek
Nov 01 11:09:26 fedora-15 systemd-logind[455]: Removed session 101.
Nov 01 11:09:28 fedora-15 python3[29709]: Allowing runtime journal files to ....
ESC[1;39m----- Reboot -----ESC[0m
Oct 28 12:08:26 fedora-15 systemd[1]: SELinux Got Sender :1.312
Oct 28 12:08:26 fedora-15 systemd[1]: GetConnectionSELinuxSecurityContext u...8)
ESC[1;39m----- Reboot -----ESC[0m
Nov 01 11:09:28 fedora-15 systemd-journal-gatewayd[11055]: Failed to send dat...
Nov 01 11:09:51 fedora-15 python3[29729]: Allowing runtime journal files to ....
ESC[1;39m----- Reboot -----ESC[0m
Oct 28 12:08:26 fedora-15 systemd[1]: SELinux access check scon=unconfined_...ic

Apparently sd_journal_next() makes the jump when at EOF.

I'm too lazy to look into sd_journal_next(), but git bisect points to:

    Author: Lennart Poettering <lennart at poettering.net>
    Date:   Fri Sep 21 20:52:23 2012 +0200

    journal: completely rework the mmap cache as I too dumb to actually understand it

Zbyszek