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qemu / qemu / 13057e064a3edae7abf9ca2c207cdf48b82c5aad
commit13057e064a3edae7abf9ca2c207cdf48b82c5aad[log] [tgz]
authorDaniil Tatianin <d-tatianin@yandex-team.ru>Wed Feb 12 17:39:20 2025 +0300
committerPeter Xu <peterx@redhat.com>Wed Feb 12 11:36:13 2025 -0500
tree1e7c4af97ad7f9e543c651aea8601a71d2f2d99d
parentcd2e472e54a49c13b0a728cdda7c10c50421e23d [diff]
overcommit: introduce mem-lock=on-fault

Locking the memory without MCL_ONFAULT instantly prefaults any mmaped
anonymous memory with a write-fault, which introduces a lot of extra
overhead in terms of memory usage when all you want to do is to prevent
kcompactd from migrating and compacting QEMU pages. Add an option to
only lock pages lazily as they're faulted by the process by using
MCL_ONFAULT if asked.

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Link: https://lore.kernel.org/r/20250212143920.1269754-5-d-tatianin@yandex-team.ru
Signed-off-by: Peter Xu <peterx@redhat.com>
5 files changed
tree: 1e7c4af97ad7f9e543c651aea8601a71d2f2d99d
  1. .github/
  2. .gitlab/
  3. .gitlab-ci.d/
  4. accel/
  5. audio/
  6. authz/
  7. backends/
  8. block/
  9. bsd-user/
  10. chardev/
  11. common-user/
  12. configs/
  13. contrib/
  14. crypto/
  15. disas/
  16. docs/
  17. dump/
  18. ebpf/
  19. fpu/
  20. fsdev/
  21. gdb-xml/
  22. gdbstub/
  23. host/
  24. hw/
  25. include/
  26. io/
  27. libdecnumber/
  28. linux-headers/
  29. linux-user/
  30. migration/
  31. monitor/
  32. nbd/
  33. net/
  34. pc-bios/
  35. plugins/
  36. po/
  37. python/
  38. qapi/
  39. qga/
  40. qobject/
  41. qom/
  42. replay/
  43. roms/
  44. rust/
  45. scripts/
  46. scsi/
  47. semihosting/
  48. stats/
  49. storage-daemon/
  50. stubs/
  51. subprojects/
  52. system/
  53. target/
  54. tcg/
  55. tests/
  56. tools/
  57. trace/
  58. ui/
  59. util/
  60. .b4-config
  61. .dir-locals.el
  62. .editorconfig
  63. .exrc
  64. .gdbinit
  65. .git-blame-ignore-revs
  66. .gitattributes
  67. .gitignore
  68. .gitlab-ci.yml
  69. .gitmodules
  70. .gitpublish
  71. .mailmap
  72. .patchew.yml
  73. .readthedocs.yml
  74. .travis.yml
  75. block.c
  76. blockdev-nbd.c
  77. blockdev.c
  78. blockjob.c
  79. configure
  80. COPYING
  81. COPYING.LIB
  82. cpu-common.c
  83. cpu-target.c
  84. event-loop-base.c
  85. gitdm.config
  86. hmp-commands-info.hx
  87. hmp-commands.hx
  88. iothread.c
  89. job-qmp.c
  90. job.c
  91. Kconfig
  92. Kconfig.host
  93. LICENSE
  94. MAINTAINERS
  95. Makefile
  96. meson.build
  97. meson_options.txt
  98. module-common.c
  99. os-posix.c
  100. os-win32.c
  101. page-target.c
  102. page-vary-common.c
  103. page-vary-target.c
  104. pythondeps.toml
  105. qemu-bridge-helper.c
  106. qemu-edid.c
  107. qemu-img-cmds.hx
  108. qemu-img.c
  109. qemu-io-cmds.c
  110. qemu-io.c
  111. qemu-keymap.c
  112. qemu-nbd.c
  113. qemu-options.hx
  114. qemu.nsi
  115. qemu.sasl
  116. README.rst
  117. replication.c
  118. trace-events
  119. VERSION
  120. version.rc