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qemu / qemu / 0e7106d8b5f7ef4f9df10baf1dfb3db482bcd046
commit0e7106d8b5f7ef4f9df10baf1dfb3db482bcd046[log] [tgz]
authorLiu Yuan <tailai.ly@taobao.com>Thu Jan 10 16:03:47 2013 +0800
committerKevin Wolf <kwolf@redhat.com>Mon Jan 14 10:06:56 2013 +0100
tree1f5f6b306b7a207492df5b36caeba1657bf96677
parent8e895599a1beb250ebca00e83b5fae6a828d2171 [diff]
sheepdog: implement direct write semantics

Sheepdog supports both writeback/writethrough write but has not yet supported
DIRECTIO semantics which bypass the cache completely even if Sheepdog daemon is
set up with cache enabled.

Suppose cache is enabled on Sheepdog daemon size, the new cache control is

cache=writeback # enable the writeback semantics for write
cache=writethrough # enable the emulated writethrough semantics for write
cache=directsync # disable cache competely

Guest WCE toggling on the run time to toggle writeback/writethrough is also
supported.

Cc: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Liu Yuan <tailai.ly@taobao.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
1 file changed
tree: 1f5f6b306b7a207492df5b36caeba1657bf96677
  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