Re: Thoughts about multipathd's log thread

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On 11/4/20 10:01 PM, Martin Wilck wrote:
On Wed, 2020-11-04 at 10:12 -0600, Benjamin Marzinski wrote:
On Wed, Nov 04, 2020 at 03:11:04PM +0100, Hannes Reinecke wrote:

Well ... isn't that what the option '-d' is for?
Namely _not_ starting the log thread when running under systemd?

Martin is arguing that syslogd is at least as likely not to block as
journald, so if we don't need the log thread when writing to journald
(though stderr), we also don't need the log thread when writing to
syslogd. Correct me, if I'm wrong Martin.

Exactly. The log thread has some race issues that we've been discussing
in another thread ("[PATCH v2 29/29] libmultipath: fix race between
log_safe and log_thread_stop()"). I had been digging into the code a
bit, and found some more things that I'd like to see improved. But I
realized fixing this for good might be hairy and take a lot of time
which would be better spent elsewhere, and started wondering if we
still need it at all.

Well, seeing that most distributions (or all I care about :-) have switched to systemd I don't have any issues with removing it.

Cheers,

Hannes
--
Dr. Hannes Reinecke                Kernel Storage Architect
hare@xxxxxxx                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer


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