[dm-devel] [PATCH 5/5] multipathd: decrease log level of uevent messages

[Benjamin Marzinski]

On Fri, Sep 14, 2018 at 02:51:03PM +0200, Martin Wilck wrote:

I agree that these messages are largely useless for users, but I often
find them helpful to figure out what multipath was doing when things go
badly.  I'm not against this patch going in. I just wish that log there
was a log level between 2 and 3 that just included notifications about
what was happening, instead of having to go to level 3 to get the
information, which adds a lot of debugging noise. Any way

Reviewed-by: Benjamin Marzinski <bmarzins at redhat.com>

> The messages "multipathd: add path (uevent)" etc. are displayed
> frequently, and often for devices that don't matter for multipathd.
> If real action needs to be taken, such as adding or removing paths
> or maps from the internal structures, multipathd emits other log
> messages at level 2 later on.
> 
> Signed-off-by: Martin Wilck <mwilck at suse.com>
> ---
>  multipathd/main.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/multipathd/main.c b/multipathd/main.c
> index cc493c18..bc95c65f 100644
> --- a/multipathd/main.c
> +++ b/multipathd/main.c
> @@ -743,7 +743,7 @@ uev_remove_map (struct uevent * uev, struct vectors * vecs)
>  	int minor;
>  	struct multipath *mpp;
>  
> -	condlog(2, "%s: remove map (uevent)", uev->kernel);
> +	condlog(3, "%s: remove map (uevent)", uev->kernel);
>  	alias = uevent_get_dm_name(uev);
>  	if (!alias) {
>  		condlog(3, "%s: No DM_NAME in uevent, ignoring", uev->kernel);
> @@ -803,7 +803,7 @@ uev_add_path (struct uevent *uev, struct vectors * vecs, int need_do_map)
>  	int ret = 0, i;
>  	struct config *conf;
>  
> -	condlog(2, "%s: add path (uevent)", uev->kernel);
> +	condlog(3, "%s: add path (uevent)", uev->kernel);
>  	if (strstr(uev->kernel, "..") != NULL) {
>  		/*
>  		 * Don't allow relative device names in the pathvec
> @@ -911,7 +911,8 @@ ev_add_path (struct path * pp, struct vectors * vecs, int need_do_map)
>  	     (pathcount(mpp, PATH_GHOST) > 0 && pp->tpgs != TPGS_IMPLICIT &&
>  	      mpp->ghost_delay_tick <= 0))) {
>  		/* if wait_for_udev is set and valid paths exist */
> -		condlog(2, "%s: delaying path addition until %s is fully initialized", pp->dev, mpp->alias);
> +		condlog(3, "%s: delaying path addition until %s is fully initialized",
> +			pp->dev, mpp->alias);
>  		mpp->wait_for_udev = 2;
>  		orphan_path(pp, "waiting for create to complete");
>  		return 0;
> @@ -1038,7 +1039,7 @@ uev_remove_path (struct uevent *uev, struct vectors * vecs, int need_do_map)
>  	struct path *pp;
>  	int ret;
>  
> -	condlog(2, "%s: remove path (uevent)", uev->kernel);
> +	condlog(3, "%s: remove path (uevent)", uev->kernel);
>  	delete_foreign(uev->udev);
>  
>  	pthread_cleanup_push(cleanup_lock, &vecs->lock);
> -- 
> 2.18.0