[dm-devel] [PATCH 49/57] multipathd: do not flush maps on startup

[Hannes Reinecke]

On 05/03/2016 04:30 AM, Benjamin Marzinski wrote:
> On Wed, Apr 27, 2016 at 01:10:50PM +0200, Hannes Reinecke wrote:
>> When the daemon is started prior to udev the paths are not present
>> (yet). However, the maps themselves will be read from device-mapper.
>> This causes existing maps to be dropped in coalesce_maps(), only
>> to be reinstated later when all paths are discovered.
>> To avoid this we should be checking for a valid hardware entry
>> per multipath map; if there is none we're in startup and shouldn't
>> drop any maps.
> 
> This doesn't just skip maps when udev hasn't started yet.  It skips any
> blacklisted maps.  For instance, if you create some multipath devices,
> add the lines
> 
> blacklist {
> 	devnode ".*"
> }
> 
> to /etc/multipath.conf, and restart or reload multipathd, all the
> blacklisted devices are still there.
> 
> NAK
> 
Okay, I'll remove this patch when I'm resending the patchset.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare at suse.de			      +49 911 74053 688
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