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chromium / chromium / src / 414e26da505fb901b73fd35f29340dc15433fec3
commit414e26da505fb901b73fd35f29340dc15433fec3[log] [tgz]
authorAlex Attar <aattar@google.com>Thu Jun 19 15:57:55 2025
committerChromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Jun 19 15:57:55 2025
treee442903ac17776820f27a68bebd8bd6ae7a5389d
parentd772f8ed51992ebb4a322436b4616c0485772e12 [diff]
[Memory Pressure] Add critical pressure signal for low disk space on Mac

When a system is critically low on disk space, browser performance can
degrade significantly as the OS may be unable to swap memory to disk
effectively.

This CL introduces a mechanism in SystemMemoryPressureEvaluator on macOS
to monitor for low disk space. It periodically checks the free space on
the volume containing the user's home directory, which serves as a
reliable proxy for the volume storing browser data.

If the available space falls below a configurable threshold (default
250MB), a MEMORY_PRESSURE_LEVEL_CRITICAL signal is dispatched. This
allows the browser to proactively reduce its memory footprint before
disk-related performance issues occur.

The feature is controlled by the MacCriticalDiskSpacePressure feature
flag, which is disabled by default.

Bug: 393346737

Change-Id: I2111c224fcd0734a0ad9084c2855fc945e4e8721
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6639007
Commit-Queue: Alex Attar <aattar@google.com>
Reviewed-by: Francois Pierre Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1476185}
3 files changed
tree: e442903ac17776820f27a68bebd8bd6ae7a5389d
  1. .github/
  2. android_webview/
  3. apps/
  4. ash/
  5. base/
  6. build/
  7. build_overrides/
  8. buildtools/
  9. cc/
  10. chrome/
  11. chromecast/
  12. chromeos/
  13. codelabs/
  14. components/
  15. content/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. gpu/
  25. headless/
  26. infra/
  27. ios/
  28. ipc/
  29. media/
  30. mojo/
  31. native_client_sdk/
  32. net/
  33. pdf/
  34. ppapi/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. clank
  51. internal
  52. ios_internal
  53. native_client
  54. signing_keys
  55. v8
  56. .clang-format
  57. .clang-tidy
  58. .clangd
  59. .cursorignore
  60. .git-blame-ignore-revs
  61. .gitallowed
  62. .gitattributes
  63. .gitignore
  64. .gitmodules
  65. .gn
  66. .mailmap
  67. .rustfmt.toml
  68. .vpython3
  69. .yapfignore
  70. ATL_OWNERS
  71. AUTHORS
  72. BUILD.gn
  73. CODE_OF_CONDUCT.md
  74. codereview.settings
  75. CPPLINT.cfg
  76. CRYPTO_OWNERS
  77. DEPS
  78. DIR_METADATA
  79. LICENSE
  80. LICENSE.chromium_os
  81. OWNERS
  82. PRESUBMIT.py
  83. PRESUBMIT_test.py
  84. PRESUBMIT_test_mocks.py
  85. README.md
  86. SECURITY_OWNERS
  87. WATCHLISTS
README.md

Logo Chromium

Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all users to experience the web.

The project's web site is https://www.chromium.org.

To check out the source code locally, don't use git clone! Instead, follow the instructions on how to get the code.

Documentation in the source is rooted in docs/README.md.

Learn how to Get Around the Chromium Source Code Directory Structure.

For historical reasons, there are some small top level directories. Now the guidance is that new top level directories are for product (e.g. Chrome, Android WebView, Ash). Even if these products have multiple executables, the code should be in subdirectories of the product.

If you found a bug, please file it at https://crbug.com/new.