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qemu / qemu / c2dfc5ba3fb3a1b7278c99bfd3bf350202169434
commitc2dfc5ba3fb3a1b7278c99bfd3bf350202169434[log] [tgz]
authorMichael S. Tsirkin <mst@redhat.com>Thu Sep 10 16:36:51 2015 +0300
committerMichael S. Tsirkin <mst@redhat.com>Thu Oct 01 16:16:52 2015 +0300
tree2f8db5fe1a3ed277d719eb8f354cbfb46a4586e2
parent0cf33fb6b49a19de32859e2cdc6021334f448fb3 [diff]
oslib: rework anonimous RAM allocation

At the moment we first allocate RAM, sometimes more than necessary for
alignment reasons.  We then free the extra RAM.

Rework this to avoid the temporary allocation: reserve the
range by mapping it with PROT_NONE, then use just the
necessary range with MAP_FIXED.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed
tree: 2f8db5fe1a3ed277d719eb8f354cbfb46a4586e2
  1. audio/
  2. backends/
  3. block/
  4. bsd-user/
  5. crypto/
  6. default-configs/
  7. disas/
  8. docs/
  9. fpu/
  10. fsdev/
  11. gdb-xml/
  12. hw/
  13. include/
  14. libdecnumber/
  15. linux-headers/
  16. linux-user/
  17. migration/
  18. net/
  19. pc-bios/
  20. po/
  21. qapi/
  22. qga/
  23. qobject/
  24. qom/
  25. roms/
  26. scripts/
  27. slirp/
  28. stubs/
  29. target-alpha/
  30. target-arm/
  31. target-cris/
  32. target-i386/
  33. target-lm32/
  34. target-m68k/
  35. target-microblaze/
  36. target-mips/
  37. target-moxie/
  38. target-openrisc/
  39. target-ppc/
  40. target-s390x/
  41. target-sh4/
  42. target-sparc/
  43. target-tilegx/
  44. target-tricore/
  45. target-unicore32/
  46. target-xtensa/
  47. tcg/
  48. tests/
  49. trace/
  50. ui/
  51. util/
  52. dtc
  53. pixman
  54. .exrc
  55. .gitignore
  56. .gitmodules
  57. .mailmap
  58. .travis.yml
  59. accel.c
  60. aio-posix.c
  61. aio-win32.c
  62. arch_init.c
  63. async.c
  64. balloon.c
  65. block.c
  66. blockdev-nbd.c
  67. blockdev.c
  68. blockjob.c
  69. bootdevice.c
  70. bt-host.c
  71. bt-vhci.c
  72. Changelog
  73. CODING_STYLE
  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-common.c
  82. cpu-exec.c
  83. cpus.c
  84. cputlb.c
  85. device-hotplug.c
  86. device_tree.c
  87. disas.c
  88. dma-helpers.c
  89. dump.c
  90. exec.c
  91. gdbstub.c
  92. HACKING
  93. hmp-commands-info.hx
  94. hmp-commands.hx
  95. hmp.c
  96. hmp.h
  97. iohandler.c
  98. ioport.c
  99. iothread.c
  100. kvm-all.c
  101. kvm-stub.c
  102. LICENSE
  103. main-loop.c
  104. MAINTAINERS
  105. Makefile
  106. Makefile.objs
  107. Makefile.target
  108. memory.c
  109. memory_mapping.c
  110. module-common.c
  111. monitor.c
  112. nbd.c
  113. numa.c
  114. os-posix.c
  115. os-win32.c
  116. page_cache.c
  117. qapi-schema.json
  118. qdev-monitor.c
  119. qdict-test-data.txt
  120. qemu-bridge-helper.c
  121. qemu-char.c
  122. qemu-coroutine-io.c
  123. qemu-coroutine-lock.c
  124. qemu-coroutine-sleep.c
  125. qemu-coroutine.c
  126. qemu-doc.texi
  127. qemu-ga.texi
  128. qemu-img-cmds.hx
  129. qemu-img.c
  130. qemu-img.texi
  131. qemu-io-cmds.c
  132. qemu-io.c
  133. qemu-log.c
  134. qemu-nbd.c
  135. qemu-nbd.texi
  136. qemu-options-wrapper.h
  137. qemu-options.h
  138. qemu-options.hx
  139. qemu-seccomp.c
  140. qemu-tech.texi
  141. qemu-timer.c
  142. qemu.nsi
  143. qemu.sasl
  144. qjson.c
  145. qmp-commands.hx
  146. qmp.c
  147. qtest.c
  148. README
  149. rules.mak
  150. softmmu_template.h
  151. spice-qemu-char.c
  152. tcg-runtime.c
  153. tci.c
  154. thread-pool.c
  155. thunk.c
  156. tpm.c
  157. trace-events
  158. translate-all.c
  159. translate-all.h
  160. translate-common.c
  161. user-exec.c
  162. VERSION
  163. version.rc
  164. vl.c
  165. xen-common-stub.c
  166. xen-common.c
  167. xen-hvm-stub.c
  168. xen-hvm.c
  169. xen-mapcache.c