On Thu, 2017-12-07 at 12:48 -0600, Benjamin Marzinski wrote: > If the lower-priority passive paths for a multipath device appear > first, > IO can go to them and cause the hardware handler to activate them, > before the higher priority paths appear, causing the devices to > failback. Setting the "ghost_delay" parameter to a value greater than > 0 can avoid this ping-ponging by causing udev to not mark the device > as > Ready after its initial creation until either an active path appears, > or ghost_delay seconds have passed. Multipathd does this by setting > the MPATH_UDEV_NO_PATHS_FLAG. > > Signed-off-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx> Reviewed-by: Martin Wilck <mwilck@xxxxxxxx> -- Dr. Martin Wilck <mwilck@xxxxxxxx>, Tel. +49 (0)911 74053 2107 SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
