Justin T. Gibbs
8a8a3387fd
Several enhancements to the Xen block back driver. ...
sys/dev/xen/blkback/blkback.c:
o Implement front-end request coalescing. This greatly improves the
performance of front-end clients that are unaware of the dynamic
request-size/number of requests negotiation available in the
FreeBSD backend driver. This required a large restructuring
in how this driver records in-flight transactions and how those
transactions are mapped into kernel KVA. For example, the driver
now includes a mini "KVA manager" that allocates ranges of
contiguous KVA to patches of requests that are physically
contiguous in the backing store so that a single bio or UIO
segment can be used to represent the I/O.
o Refuse to open any backend files or devices if the system
has yet to mount root. This avoids a panic.
o Properly handle "onlined" devices. An "onlined" backend
device stays attached to its backing store across front-end
disconnections. This feature is intended to reduce latency
when a front-end does a hand-off to another driver (e.g.
PV aware bootloader to OS kernel) or during a VM reboot.
o Harden the driver against a pathological/buggy front-end
by carefully vetting front-end XenStore data such as the
front-end state.
o Add sysctls that report the negotiated number of
segments per-request and the number of requests that
can be concurrently in flight.
Submitted by: kdm
Reviewed by: gibbs
Sponsored by: Spectra Logic Corporation
MFC after: 1 week
2011-06-13 20:36:29 +00:00
2011-06-10 20:23:56 +00:00
2011-01-19 00:57:58 +00:00
2011-06-10 12:30:16 +00:00
2011-01-06 21:02:14 +00:00
2011-02-21 09:01:34 +00:00
2011-05-03 19:51:29 +00:00
2011-05-03 19:51:29 +00:00
2011-03-23 13:10:15 +00:00
2011-05-26 10:10:10 +00:00
2011-04-19 18:09:21 +00:00
2011-05-19 23:13:08 +00:00
2011-05-19 23:13:08 +00:00
2011-06-07 06:18:02 +00:00
2010-07-28 16:24:11 +00:00
2010-05-03 07:32:50 +00:00
2011-04-06 20:54:26 +00:00
2011-02-21 09:01:34 +00:00
2011-06-09 16:30:13 +00:00
2011-06-13 04:31:57 +00:00
2011-06-11 01:19:19 +00:00
2011-05-03 19:51:29 +00:00
2011-05-03 19:51:29 +00:00
2011-05-15 21:44:51 +00:00
2011-02-21 09:01:34 +00:00
2011-05-12 14:27:28 +00:00
2011-01-18 15:23:16 +00:00
2011-01-17 20:15:15 +00:00
2011-03-23 13:10:15 +00:00
2011-06-08 21:18:14 +00:00
2011-06-06 13:21:11 +00:00
2011-04-22 09:44:01 +00:00
2010-10-13 17:38:23 +00:00
2010-08-11 02:13:50 +00:00
2011-05-22 20:55:54 +00:00
2010-10-02 08:18:19 +00:00
2010-05-03 07:32:50 +00:00
2011-05-05 19:15:15 +00:00
2010-10-13 17:38:23 +00:00
2011-01-29 00:53:58 +00:00
2011-02-21 09:01:34 +00:00
2010-05-03 07:32:50 +00:00
2011-03-25 20:53:02 +00:00
2011-06-11 04:50:54 +00:00
2011-05-03 19:51:29 +00:00
2011-04-23 23:11:44 +00:00
2011-05-05 17:28:45 +00:00
2011-05-03 19:51:29 +00:00
2011-01-18 21:14:23 +00:00
2011-02-21 09:01:34 +00:00
2011-04-22 13:56:21 +00:00
2011-05-03 19:51:29 +00:00
2010-05-03 07:32:50 +00:00
2011-01-18 21:14:23 +00:00
2011-02-13 19:25:48 +00:00
2011-02-21 09:01:34 +00:00
2011-04-29 18:41:21 +00:00
2010-05-03 07:32:50 +00:00
2011-03-11 22:19:49 +00:00
2011-02-16 20:07:44 +00:00
2011-05-03 19:51:29 +00:00
2011-05-20 17:01:22 +00:00
2011-05-15 19:04:08 +00:00
2010-11-11 20:18:33 +00:00
2010-12-18 14:24:24 +00:00
2011-05-03 19:51:29 +00:00
2010-06-19 13:41:17 +00:00
2011-03-21 09:40:01 +00:00
2010-10-13 14:41:52 +00:00
2011-05-16 23:35:14 +00:00
2011-05-11 20:31:27 +00:00
2011-05-11 20:31:27 +00:00
2010-05-03 07:32:50 +00:00
2010-12-10 22:20:11 +00:00
2011-01-22 21:33:18 +00:00
2011-06-08 16:00:30 +00:00
2010-04-28 15:38:01 +00:00
2011-04-14 07:14:22 +00:00
2011-05-31 19:08:25 +00:00
2011-01-18 21:14:23 +00:00
2011-03-10 23:53:01 +00:00
2011-01-05 23:15:22 +00:00
2011-05-31 19:08:25 +00:00
2011-06-10 17:06:25 +00:00
2011-02-21 09:01:34 +00:00
2011-06-02 05:31:54 +00:00
2011-05-03 19:51:29 +00:00
2010-10-13 11:37:12 +00:00
2010-10-13 11:37:12 +00:00
2011-03-28 12:48:33 +00:00
2010-12-18 14:21:28 +00:00
2011-03-24 08:56:12 +00:00
2011-05-03 19:51:29 +00:00
2010-12-20 16:39:43 +00:00
2011-03-23 13:10:15 +00:00
2011-05-13 19:35:01 +00:00
2011-01-17 22:58:28 +00:00
2011-06-02 00:43:16 +00:00
2010-10-15 14:52:11 +00:00
2011-05-14 20:31:04 +00:00
2011-05-15 13:17:08 +00:00
2010-01-28 08:41:30 +00:00
2011-05-30 06:23:51 +00:00
2011-02-25 17:30:25 +00:00
2011-04-22 09:59:16 +00:00
2011-05-31 01:30:58 +00:00
2011-05-25 13:55:49 +00:00
2011-04-22 00:44:27 +00:00
2011-04-07 13:49:44 +00:00
2010-05-03 07:32:50 +00:00
2011-05-31 18:45:15 +00:00
2011-05-03 19:51:29 +00:00
2011-05-13 19:35:01 +00:00
2011-05-03 19:51:29 +00:00
2011-04-03 11:55:48 +00:00
2011-02-21 09:01:34 +00:00
2010-11-11 13:42:46 +00:00
2011-01-19 00:57:58 +00:00
2011-06-06 16:27:38 +00:00
2011-01-12 19:53:56 +00:00
2011-06-10 13:24:56 +00:00
2011-05-03 19:51:29 +00:00
2010-05-03 07:32:50 +00:00
2010-09-05 20:04:02 +00:00
2010-09-10 11:19:03 +00:00
2011-02-19 17:38:51 +00:00
2011-01-04 10:59:38 +00:00
2011-06-06 15:33:15 +00:00
2010-07-11 21:08:29 +00:00
2011-04-09 14:45:50 +00:00
2011-02-21 09:01:34 +00:00
2011-03-23 13:10:15 +00:00
2011-06-12 23:33:08 +00:00
2010-05-03 07:32:50 +00:00
2011-05-15 13:27:38 +00:00
2011-05-30 06:23:51 +00:00
2010-07-11 21:08:29 +00:00
2011-05-03 19:51:29 +00:00
2011-05-03 19:51:29 +00:00
2011-03-23 13:10:15 +00:00
2011-05-25 13:55:49 +00:00
2011-02-08 00:16:36 +00:00
2011-05-03 19:51:29 +00:00
2011-03-11 22:21:12 +00:00
2010-10-15 15:00:30 +00:00
2010-05-03 07:32:50 +00:00
2010-05-03 07:32:50 +00:00
2011-06-13 20:34:12 +00:00
2010-09-10 11:19:03 +00:00
2011-05-03 19:51:29 +00:00
2011-03-11 22:23:46 +00:00
2011-04-01 13:28:34 +00:00
2011-04-22 12:46:39 +00:00
2011-05-09 18:46:49 +00:00
2010-11-15 05:25:51 +00:00
2011-03-11 22:32:17 +00:00
2010-10-24 12:51:02 +00:00
2010-08-12 00:16:18 +00:00
2010-01-28 08:41:30 +00:00
2011-01-28 23:40:13 +00:00
2010-09-04 16:27:14 +00:00
2011-05-03 19:51:29 +00:00
2011-03-23 13:10:15 +00:00
2011-05-26 17:02:56 +00:00
2010-03-29 17:26:24 +00:00
2011-06-06 22:03:09 +00:00
2011-05-20 18:27:13 +00:00
2011-05-03 19:51:29 +00:00
2011-05-03 19:51:29 +00:00
2011-02-21 09:01:34 +00:00
2011-05-03 15:58:24 +00:00
2011-04-27 16:43:03 +00:00
2011-05-03 19:51:29 +00:00
2011-01-19 17:04:07 +00:00
2010-05-03 07:32:50 +00:00
2011-05-31 19:08:25 +00:00
2010-05-03 07:32:50 +00:00
2011-06-13 20:36:29 +00:00
2011-05-07 04:40:44 +00:00
8a8a3387fd