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qemu-android / qemu-android / 4899d10d142e97eea8f64141a3507b2ee1a64f52
commit4899d10d142e97eea8f64141a3507b2ee1a64f52[log] [tgz]
authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>Mon Apr 19 13:34:11 2010 +0100
committerKevin Wolf <kwolf@redhat.com>Mon May 03 10:07:31 2010 +0200
tree33961747d5ae2927bd04120140f1956f0a022c66
parent508e0893686794be55cfaa336fea584b16a471d9 [diff]
raw-posix: Use pread/pwrite instead of lseek+read/write

This patch combines the lseek+read/write calls to use pread/pwrite
instead.  This will result in fewer system calls and is already used by
AIO.

Thanks to Jan Kiszka <jan.kiszka@siemens.com> for identifying excessive
lseek and Christoph Hellwig <hch@lst.de> for confirming that this
approach should work.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
1 file changed
tree: 33961747d5ae2927bd04120140f1956f0a022c66
  1. audio/
  2. block/
  3. bsd-user/
  4. darwin-user/
  5. default-configs/
  6. docs/
  7. fpu/
  8. gdb-xml/
  9. hw/
  10. linux-user/
  11. net/
  12. pc-bios/
  13. QMP/
  14. roms/
  15. slirp/
  16. sysconfigs/
  17. target-alpha/
  18. target-arm/
  19. target-cris/
  20. target-i386/
  21. target-m68k/
  22. target-microblaze/
  23. target-mips/
  24. target-ppc/
  25. target-s390x/
  26. target-sh4/
  27. target-sparc/
  28. tcg/
  29. tests/
  30. .gitignore
  31. .gitmodules
  32. a.out.h
  33. acl.c
  34. acl.h
  35. aes.c
  36. aes.h
  37. aio.c
  38. alpha-dis.c
  39. alpha.ld
  40. arch_init.c
  41. arch_init.h
  42. arm-dis.c
  43. arm-semi.c
  44. arm.ld
  45. async.c
  46. balloon.c
  47. balloon.h
  48. block-migration.c
  49. block-migration.h
  50. block.c
  51. block.h
  52. block_int.h
  53. bswap.h
  54. bt-host.c
  55. bt-host.h
  56. bt-vhci.c
  57. buffered_file.c
  58. buffered_file.h
  59. cache-utils.c
  60. cache-utils.h
  61. Changelog
  62. check-qdict.c
  63. check-qfloat.c
  64. check-qint.c
  65. check-qjson.c
  66. check-qlist.c
  67. check-qstring.c
  68. cmd.c
  69. cmd.h
  70. cocoa.m
  71. CODING_STYLE
  72. config.h
  73. configure
  74. console.c
  75. console.h
  76. COPYING
  77. COPYING.LIB
  78. cpu-all.h
  79. cpu-common.h
  80. cpu-defs.h
  81. cpu-exec.c
  82. cpus.c
  83. cpus.h
  84. create_config
  85. cris-dis.c
  86. curses.c
  87. curses_keys.h
  88. cutils.c
  89. d3des.c
  90. d3des.h
  91. def-helper.h
  92. device_tree.c
  93. device_tree.h
  94. dis-asm.h
  95. disas.c
  96. disas.h
  97. dma-helpers.c
  98. dma.h
  99. dyngen-exec.h
  100. elf.h
  101. envlist.c
  102. envlist.h
  103. exec-all.h
  104. exec.c
  105. feature_to_c.sh
  106. gdbstub.c
  107. gdbstub.h
  108. gen-icount.h
  109. host-utils.c
  110. host-utils.h
  111. hpet.h
  112. hppa-dis.c
  113. hppa.ld
  114. hxtool
  115. i386-dis.c
  116. i386.ld
  117. ia64-dis.c
  118. ia64.ld
  119. input.c
  120. ioport-user.c
  121. ioport.c
  122. ioport.h
  123. json-lexer.c
  124. json-lexer.h
  125. json-parser.c
  126. json-parser.h
  127. json-streamer.c
  128. json-streamer.h
  129. keymaps.c
  130. keymaps.h
  131. kvm-all.c
  132. kvm-stub.c
  133. kvm.h
  134. libfdt_env.h
  135. LICENSE
  136. linux-aio.c
  137. m68k-dis.c
  138. m68k-semi.c
  139. m68k.ld
  140. MAINTAINERS
  141. Makefile
  142. Makefile.dis
  143. Makefile.hw
  144. Makefile.objs
  145. Makefile.target
  146. Makefile.user
  147. microblaze-dis.c
  148. migration-exec.c
  149. migration-fd.c
  150. migration-tcp.c
  151. migration-unix.c
  152. migration.c
  153. migration.h
  154. mips-dis.c
  155. mips.ld
  156. module.c
  157. module.h
  158. monitor.c
  159. monitor.h
  160. nbd.c
  161. nbd.h
  162. net-checksum.c
  163. net.c
  164. net.h
  165. notify.c
  166. notify.h
  167. osdep.c
  168. osdep.h
  169. path.c
  170. pci-ids.txt
  171. poison.h
  172. posix-aio-compat.c
  173. ppc-dis.c
  174. ppc.ld
  175. ppc64.ld
  176. qbool.c
  177. qbool.h
  178. qdict-test-data.txt
  179. qdict.c
  180. qdict.h
  181. qemu-aio.h
  182. qemu-barrier.h
  183. qemu-binfmt-conf.sh
  184. qemu-char.c
  185. qemu-char.h
  186. qemu-common.h
  187. qemu-config.c
  188. qemu-config.h
  189. qemu-doc.texi
  190. qemu-error.c
  191. qemu-error.h
  192. qemu-img-cmds.hx
  193. qemu-img.c
  194. qemu-img.texi
  195. qemu-io.c
  196. qemu-lock.h
  197. qemu-log.h
  198. qemu-malloc.c
  199. qemu-monitor.hx
  200. qemu-nbd.c
  201. qemu-nbd.texi
  202. qemu-objects.h
  203. qemu-option.c
  204. qemu-option.h
  205. qemu-options.hx
  206. qemu-queue.h
  207. qemu-sockets.c
  208. qemu-tech.texi
  209. qemu-thread.c
  210. qemu-thread.h
  211. qemu-timer.c
  212. qemu-timer.h
  213. qemu-tool.c
  214. qemu-x509.h
  215. qemu.sasl
  216. qemu_socket.h
  217. qerror.c
  218. qerror.h
  219. qfloat.c
  220. qfloat.h
  221. qint.c
  222. qint.h
  223. qjson.c
  224. qjson.h
  225. qlist.c
  226. qlist.h
  227. qobject.h
  228. qstring.c
  229. qstring.h
  230. readline.c
  231. readline.h
  232. README
  233. rules.mak
  234. rwhandler.c
  235. rwhandler.h
  236. s390-dis.c
  237. s390.ld
  238. savevm.c
  239. sdl.c
  240. sdl_keysym.h
  241. sdl_zoom.c
  242. sdl_zoom.h
  243. sdl_zoom_template.h
  244. sh4-dis.c
  245. softmmu-semi.h
  246. softmmu_defs.h
  247. softmmu_exec.h
  248. softmmu_header.h
  249. softmmu_template.h
  250. sparc-dis.c
  251. sparc.ld
  252. sparc64.ld
  253. sysemu.h
  254. targphys.h
  255. tcg-runtime.c
  256. texi2pod.pl
  257. thunk.c
  258. thunk.h
  259. TODO
  260. translate-all.c
  261. uboot_image.h
  262. usb-bsd.c
  263. usb-linux.c
  264. usb-stub.c
  265. VERSION
  266. vgafont.h
  267. vl.c
  268. vnc-auth-sasl.c
  269. vnc-auth-sasl.h
  270. vnc-auth-vencrypt.c
  271. vnc-auth-vencrypt.h
  272. vnc-tls.c
  273. vnc-tls.h
  274. vnc.c
  275. vnc.h
  276. vnc_keysym.h
  277. vnchextile.h
  278. x86_64.ld
  279. x_keymap.c
  280. x_keymap.h