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review.shift-gmbh.com / SHIFTPHONES / android_system_vold / a485006ab147695fa28ec20c11ffef4f018253a3
commita485006ab147695fa28ec20c11ffef4f018253a3[log] [tgz]
authorMartijn Coenen <maco@google.com>Mon Jun 29 11:53:34 2020 +0200
committerMartijn Coenen <maco@google.com>Tue Jun 30 10:16:55 2020 +0200
treeb05e7cc5d0621f9b848e6dff1093c8d985d69f81
parentf71707916fdf11715bde10a7b76e92426ea1f32f [diff]
Configure backing device max_ratio for FUSE filesystems.

By default FUSE filesystems have a max_ratio of 1%, meaning only 1% of
dirty pages on the system can belong to a FUSE filesystem before we
start writing back pages (and throttling, if writeback can't keep up).
This limit is useful for untrusted filesystems, but in our case, we
trust the FUSE filesystem. Since FUSE writes result in writes to the
lower filesystem, FUSE should take at most 50%. Let's start with
changing max_ratio to 40%, to avoid needless throttling.

Bug: 159254170
Bug: 159770752
Test: inspect /sys/class/bdi manually after boot
Change-Id: I467e3770fc4afba0a08fa480c0b86aa054c8b875
4 files changed
tree: b05e7cc5d0621f9b848e6dff1093c8d985d69f81
  1. bench/
  2. binder/
  3. fs/
  4. model/
  5. tests/
  6. .clang-format ⇨ ../../build/soong/scripts/system-clang-format
  7. Android.bp
  8. AppFuseUtil.cpp
  9. AppFuseUtil.h
  10. Benchmark.cpp
  11. Benchmark.h
  12. BenchmarkGen.h
  13. CheckEncryption.cpp
  14. CheckEncryption.h
  15. Checkpoint.cpp
  16. Checkpoint.h
  17. CleanSpec.mk
  18. cryptfs.cpp
  19. cryptfs.h
  20. CryptoType.cpp
  21. CryptoType.h
  22. Devmapper.cpp
  23. Devmapper.h
  24. EncryptInplace.cpp
  25. EncryptInplace.h
  26. FileDeviceUtils.cpp
  27. FileDeviceUtils.h
  28. FsCrypt.cpp
  29. FsCrypt.h
  30. fscrypt_uapi.h
  31. IdleMaint.cpp
  32. IdleMaint.h
  33. KeyBuffer.cpp
  34. KeyBuffer.h
  35. Keymaster.cpp
  36. Keymaster.h
  37. KeyStorage.cpp
  38. KeyStorage.h
  39. KeyUtil.cpp
  40. KeyUtil.h
  41. Loop.cpp
  42. Loop.h
  43. main.cpp
  44. MetadataCrypt.cpp
  45. MetadataCrypt.h
  46. MoveStorage.cpp
  47. MoveStorage.h
  48. NetlinkHandler.cpp
  49. NetlinkHandler.h
  50. NetlinkManager.cpp
  51. NetlinkManager.h
  52. OWNERS
  53. PREUPLOAD.cfg
  54. Process.cpp
  55. Process.h
  56. ScryptParameters.cpp
  57. ScryptParameters.h
  58. secdiscard.cpp
  59. sehandle.h
  60. TEST_MAPPING
  61. Utils.cpp
  62. Utils.h
  63. vdc.cpp
  64. vdc.rc
  65. vold.rc
  66. vold_prepare_subdirs.cpp
  67. VoldNativeService.cpp
  68. VoldNativeService.h
  69. VoldNativeServiceValidation.cpp
  70. VoldNativeServiceValidation.h
  71. VoldUtil.cpp
  72. VoldUtil.h
  73. VolumeManager.cpp
  74. VolumeManager.h
  75. wait_for_keymaster.cpp
  76. wait_for_keymaster.rc