On Wed, 2021-12-15 at 11:44 -0600, Benjamin Marzinski wrote: > A mulitpath device can only be reloaded read/write when all paths are > read/write. Also, whenever a read-only scsi device is rescanned, the > scsi subsystem will first unconditionally issue a uevent with > DISK_RO=0 > before checking the read-only status, and if it the device is still > read-only, issuing another uevent with DISK_RO=1. These uevents cause > pointless reloads when read-only paths are rescanned. To avoid this, > first check if the path is being changed to the existing multipath > read-only state. If the state is the same, do nothing. If it's > different, check to see if all paths are read/write before changing a > multipath device from read-only to read/write. If the multipath > device > read-only state is unknown, assume that it needs to be reloaded. > > Signed-off-by: Benjamin Marzinski <bmarzins@xxxxxxxxxx> Reviewed-by: Martin Wilck <mwilck@xxxxxxxx> -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel
