blkback.c (cf40a76e7d5874bb25f4404eecc58a2e033af885) blkback.c (5657a819a8d94426c76be04dcedfad0f64cfff00)
1/******************************************************************************
2 *
3 * Back-end of the driver for virtual block devices. This portion of the
4 * driver exports a 'unified' block-device interface that can be accessed
5 * by any operating system that implements a compatible front end. A
6 * reference front-end implementation can be found in:
7 * drivers/block/xen-blkfront.c
8 *

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93 "Maximum number of hardware queues per virtual disk." \
94 "By default it is the number of online CPUs.");
95
96/*
97 * Maximum order of pages to be used for the shared ring between front and
98 * backend, 4KB page granularity is used.
99 */
100unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
1/******************************************************************************
2 *
3 * Back-end of the driver for virtual block devices. This portion of the
4 * driver exports a 'unified' block-device interface that can be accessed
5 * by any operating system that implements a compatible front end. A
6 * reference front-end implementation can be found in:
7 * drivers/block/xen-blkfront.c
8 *

--- 84 unchanged lines hidden (view full) ---

93 "Maximum number of hardware queues per virtual disk." \
94 "By default it is the number of online CPUs.");
95
96/*
97 * Maximum order of pages to be used for the shared ring between front and
98 * backend, 4KB page granularity is used.
99 */
100unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
101module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, S_IRUGO);
101module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, 0444);
102MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the shared ring");
103/*
104 * The LRU mechanism to clean the lists of persistent grants needs to
105 * be executed periodically. The time interval between consecutive executions
106 * of the purge mechanism is set in ms.
107 */
108#define LRU_INTERVAL 100
109

--- 1392 unchanged lines hidden --- 		102MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the shared ring");
103/*
104 * The LRU mechanism to clean the lists of persistent grants needs to
105 * be executed periodically. The time interval between consecutive executions
106 * of the purge mechanism is set in ms.
107 */
108#define LRU_INTERVAL 100
109

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