14553350fSSeongJae ParkWhat: /sys/module/xen_blkfront/parameters/max_indirect_segments 22d5dc3baSKonrad Rzeszutek WilkDate: June 2013 32d5dc3baSKonrad Rzeszutek WilkKernelVersion: 3.11 42d5dc3baSKonrad Rzeszutek WilkContact: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 52d5dc3baSKonrad Rzeszutek WilkDescription: 62d5dc3baSKonrad Rzeszutek Wilk Maximum number of segments that the frontend will negotiate 72d5dc3baSKonrad Rzeszutek Wilk with the backend for indirect descriptors. The default value 82d5dc3baSKonrad Rzeszutek Wilk is 32 - higher value means more potential throughput but more 92d5dc3baSKonrad Rzeszutek Wilk memory usage. The backend picks the minimum of the frontend 102d5dc3baSKonrad Rzeszutek Wilk and its default backend value. 1174a85247SSeongJae Park 1274a85247SSeongJae ParkWhat: /sys/module/xen_blkfront/parameters/feature_persistent 1374a85247SSeongJae ParkDate: September 2020 1474a85247SSeongJae ParkKernelVersion: 5.10 1512f112c3SSeongJae ParkContact: Maximilian Heyne <mheyne@amazon.de> 1674a85247SSeongJae ParkDescription: 1774a85247SSeongJae Park Whether to enable the persistent grants feature or not. Note 18*402c43eaSSeongJae Park that this option only takes effect on newly connected frontends. 1974a85247SSeongJae Park The default is Y (enable). 20