On Wed, Nov 05 2014 at 8:35am -0500, Hannes Reinecke <hare@xxxxxxx> wrote: > When creating new devices dm_sync_table() calls > synchronize_rcu_expedited(), causing _all_ pending > RCU pointers to be flushed. This causes a latency > overhead especially noticeable when creating lots > of devices. > And all of this is pointless as there are no old > maps to be disconnected, and hence no stale pointers > which would need to be cleared up. > > Signed-off-by: Hannes Reinecke <hare@xxxxxxx> Looks good, I'll get it staged for 3.19 (will need to be rebased on the linux-dm.git 'dm-for-3.19' branch given the suspend related refactoring there, but I'll take care of it as needed). -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
