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[Bug 1021307] journald frequently crashes with coredump of the journal daemon itself
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Mon, 30 Jan 2017 16:37:16 +0000
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Franck Bui <fbui@xxxxxxxx> changed:

What |Removed |Added
CC| |mgorman@xxxxxxxx
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--- Comment #9 from Franck Bui <fbui@xxxxxxxx> ---
@Siegbert: I probably should have started with this but is there any
process/service doing heavy logging or heavy disk IOs while this happening ?

Currently my suspicion is that syncing the journal to your (SSD) disk
(formatted with BTRFS) takes a while (more than 3 min) for some reasons.

@Mel, do you have an idea how this could be traced without interfering with the
timings of journald ?

It might be possible by using perf or do you think strace should be enough for
this case ?

Maybe there are some other tools.

Basicallly journald mmaps the journal file for appending new records in the
journal file and calls fsync() to write out the data into the disk every 5 min
or so.


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