Kernel config tweaks for Bluetooth and OverlayFS#2067
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agners merged 2 commits intohome-assistant:devfrom Aug 16, 2022
Merged
Kernel config tweaks for Bluetooth and OverlayFS#2067agners merged 2 commits intohome-assistant:devfrom
agners merged 2 commits intohome-assistant:devfrom
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Enable a couple of potential useful Bluetooth protocol drivers. Also enable Bluetooth Network Encapsulation Protocol since the BlueZ plug-in seems to be enabled.
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Currently `CONFIG_OVERLAY_FS_METACOPY` and `CONFIG_OVERLAY_FS_REDIRECT_DIR` kernel options are enabled but not preferred by Docker. The metadata copy feature is disabled by default, and also not actively used by the overlayfs2 driver (see moby/moby@2c3d1f7). So the metadata copy config is not really problematic per se. However, it enables the redirect_dir feature. And a kernel which has the redirect_dir feature compiled in also enables it by default. This actually makes the overlayfs2 driver to fallback to naive diff, which is, from what I understand, slower than the overlayfs native diff (see also moby/moby@49c3a7c). The Docker daemon is also reporting this on startup: ``` Not using native diff for overlay2, this may cause degraded performance for building images: kernel has CONFIG_OVERLAY_FS_REDIRECT_DIR enabled ``` Currently `CONFIG_OVERLAY_FS_METACOPY` is enabled, and it also enables `CONFIG_OVERLAY_FS_REDIRECT_DIR`. There was already a previous attempt to disable the latter (see home-assistant#2067). Disable both configs explicitly until Docker is able to use them.
agners
added a commit
to agners/operating-system
that referenced
this pull request
Sep 26, 2023
Currently `CONFIG_OVERLAY_FS_METACOPY` and `CONFIG_OVERLAY_FS_REDIRECT_DIR` kernel options are enabled but not preferred by Docker. The metadata copy feature is disabled by default, and also not actively used by the overlayfs2 driver (see moby/moby@2c3d1f7). So the metadata copy config is not really problematic per se. However, it enables the redirect_dir feature. And a kernel which has the redirect_dir feature compiled in also enables it by default. This actually makes the overlayfs2 driver to fallback to naive diff, which is, from what I understand, slower than the overlayfs native diff (see also moby/moby@49c3a7c). The Docker daemon is also reporting this on startup: Not using native diff for overlay2, this may cause degraded performance for building images: kernel has CONFIG_OVERLAY_FS_REDIRECT_DIR enabled Currently `CONFIG_OVERLAY_FS_METACOPY` is enabled, and it also enables `CONFIG_OVERLAY_FS_REDIRECT_DIR`. There was already a previous attempt to disable the latter (see home-assistant#2067). Disable both configs explicitly until Docker is able to use them.
agners
added a commit
that referenced
this pull request
Sep 26, 2023
Currently `CONFIG_OVERLAY_FS_METACOPY` and `CONFIG_OVERLAY_FS_REDIRECT_DIR` kernel options are enabled but not preferred by Docker. The metadata copy feature is disabled by default, and also not actively used by the overlayfs2 driver (see moby/moby@2c3d1f7). So the metadata copy config is not really problematic per se. However, it enables the redirect_dir feature. And a kernel which has the redirect_dir feature compiled in also enables it by default. This actually makes the overlayfs2 driver to fallback to naive diff, which is, from what I understand, slower than the overlayfs native diff (see also moby/moby@49c3a7c). The Docker daemon is also reporting this on startup: Not using native diff for overlay2, this may cause degraded performance for building images: kernel has CONFIG_OVERLAY_FS_REDIRECT_DIR enabled Currently `CONFIG_OVERLAY_FS_METACOPY` is enabled, and it also enables `CONFIG_OVERLAY_FS_REDIRECT_DIR`. There was already a previous attempt to disable the latter (see #2067). Disable both configs explicitly until Docker is able to use them.
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Enable a couple of potential useful Bluetooth protocol drivers.
Also enable Bluetooth Network Encapsulation Protocol since the BlueZ
plug-in seems to be enabled.
Drop OverlayFS configuration not liked by Docker (
CONFIG_OVERLAY_FS_REDIRECT_DIR).