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qemu / qemu / e72f66a0a20f38d0c7576f6c0aec0ca644976e35
commite72f66a0a20f38d0c7576f6c0aec0ca644976e35[log] [tgz]
authorStefan Hajnoczi <stefanha@redhat.com>Wed Nov 14 15:39:30 2012 +0100
committerStefan Hajnoczi <stefanha@redhat.com>Wed Jan 02 16:08:47 2013 +0100
tree9d11eacdfee7ea73f47543d3617cb07e8a3a2cca
parent8a873ba78069ef81c4ef073a0bd703172c8b3312 [diff]
dataplane: add virtio-blk data plane code

virtio-blk-data-plane is a subset implementation of virtio-blk.  It only
handles read, write, and flush requests.  It does this using a dedicated
thread that executes an epoll(2)-based event loop and processes I/O
using Linux AIO.

This approach performs very well but can be used for raw image files
only.  The number of IOPS achieved has been reported to be several times
higher than the existing virtio-blk implementation.

Eventually it should be possible to unify virtio-blk-data-plane with the
main body of QEMU code once the block layer and hardware emulation is
able to run outside the global mutex.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
5 files changed
tree: 9d11eacdfee7ea73f47543d3617cb07e8a3a2cca
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. default-configs/
  6. disas/
  7. docs/
  8. fpu/
  9. fsdev/
  10. gdb-xml/
  11. hw/
  12. include/
  13. ldscripts/
  14. libcacard/
  15. linux-headers/
  16. linux-user/
  17. net/
  18. pc-bios/
  19. qapi/
  20. qga/
  21. QMP/
  22. qom/
  23. roms/
  24. scripts/
  25. slirp/
  26. stubs/
  27. sysconfigs/
  28. target-alpha/
  29. target-arm/
  30. target-cris/
  31. target-i386/
  32. target-lm32/
  33. target-m68k/
  34. target-microblaze/
  35. target-mips/
  36. target-openrisc/
  37. target-ppc/
  38. target-s390x/
  39. target-sh4/
  40. target-sparc/
  41. target-unicore32/
  42. target-xtensa/
  43. tcg/
  44. tests/
  45. trace/
  46. ui/
  47. pixman
  48. .exrc
  49. .gitignore
  50. .gitmodules
  51. .mailmap
  52. acl.c
  53. aes.c
  54. aio-posix.c
  55. aio-win32.c
  56. arch_init.c
  57. async.c
  58. balloon.c
  59. bitmap.c
  60. bitops.c
  61. block-migration.c
  62. block.c
  63. blockdev-nbd.c
  64. blockdev.c
  65. blockjob.c
  66. bt-host.c
  67. bt-vhci.c
  68. cache-utils.c
  69. Changelog
  70. cmd.c
  71. cmd.h
  72. CODING_STYLE
  73. compatfd.c
  74. configure
  75. COPYING
  76. COPYING.LIB
  77. coroutine-gthread.c
  78. coroutine-sigaltstack.c
  79. coroutine-ucontext.c
  80. coroutine-win32.c
  81. cpu-exec.c
  82. cpus.c
  83. cputlb.c
  84. cutils.c
  85. device_tree.c
  86. disas.c
  87. dma-helpers.c
  88. dump-stub.c
  89. dump.c
  90. envlist.c
  91. error.c
  92. event_notifier-posix.c
  93. event_notifier-win32.c
  94. exec.c
  95. gdbstub.c
  96. HACKING
  97. hmp-commands.hx
  98. hmp.c
  99. hmp.h
  100. host-utils.c
  101. iohandler.c
  102. ioport.c
  103. iov.c
  104. json-lexer.c
  105. json-parser.c
  106. json-streamer.c
  107. kvm-all.c
  108. kvm-stub.c
  109. LICENSE
  110. main-loop.c
  111. MAINTAINERS
  112. Makefile
  113. Makefile.objs
  114. Makefile.target
  115. memory.c
  116. memory_mapping-stub.c
  117. memory_mapping.c
  118. migration-exec.c
  119. migration-fd.c
  120. migration-tcp.c
  121. migration-unix.c
  122. migration.c
  123. module.c
  124. monitor.c
  125. nbd.c
  126. notify.c
  127. os-posix.c
  128. os-win32.c
  129. osdep.c
  130. oslib-posix.c
  131. oslib-win32.c
  132. page_cache.c
  133. path.c
  134. pci-ids.txt
  135. qapi-schema-test.json
  136. qapi-schema.json
  137. qbool.c
  138. qdict-test-data.txt
  139. qdict.c
  140. qemu-bridge-helper.c
  141. qemu-char.c
  142. qemu-config.c
  143. qemu-coroutine-io.c
  144. qemu-coroutine-lock.c
  145. qemu-coroutine-sleep.c
  146. qemu-coroutine.c
  147. qemu-doc.texi
  148. qemu-error.c
  149. qemu-img-cmds.hx
  150. qemu-img.c
  151. qemu-img.texi
  152. qemu-io.c
  153. qemu-log.c
  154. qemu-nbd.c
  155. qemu-nbd.texi
  156. qemu-option.c
  157. qemu-options-wrapper.h
  158. qemu-options.h
  159. qemu-options.hx
  160. qemu-progress.c
  161. qemu-seccomp.c
  162. qemu-sockets.c
  163. qemu-tech.texi
  164. qemu-thread-posix.c
  165. qemu-thread-win32.c
  166. qemu-timer-common.c
  167. qemu-timer.c
  168. qemu-tool.c
  169. qemu-user.c
  170. qemu.sasl
  171. qerror.c
  172. qfloat.c
  173. qint.c
  174. qjson.c
  175. qlist.c
  176. qmp-commands.hx
  177. qmp.c
  178. qstring.c
  179. qtest.c
  180. readline.c
  181. README
  182. rules.mak
  183. savevm.c
  184. spice-qemu-char.c
  185. tcg-runtime.c
  186. tci.c
  187. thread-pool.c
  188. thunk.c
  189. TODO
  190. trace-events
  191. trace.h
  192. translate-all.c
  193. translate-all.h
  194. uri.c
  195. user-exec.c
  196. VERSION
  197. version.rc
  198. vl.c
  199. xen-all.c
  200. xen-mapcache.c
  201. xen-stub.c