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Merge "Add some README.md text for init triggers." am: 04d0f7d303

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Original change: https://android-review.googlesource.com/c/platform/system/core/+/1724076

Change-Id: I2d32af4b7fe3d249c0d53f87dbb7efac7a610447
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Treehugger Robot 2021-06-15 19:57:18 +00:00 committed by Automerger Merge Worker
commit 283798235e
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init/README.md
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@ -406,6 +406,33 @@ at three times:
3. Any time that property c transitions to value d, while property a already equals b.
Trigger Sequence
----------------
Init uses the following sequence of triggers during early boot. These are the
built-in triggers defined in init.cpp.
1. `early-init` - The first in the sequence, triggered after cgroups has been configured
but before ueventd's coldboot is complete.
2. `init` - Triggered after coldboot is complete.
3. `charger` - Triggered if `ro.bootmode == "charger"`.
4. `late-init` - Triggered if `ro.bootmode != "charger"`, or via healthd triggering a boot
from charging mode.
Remaining triggers are configured in `init.rc` and are not built-in. The default sequence for
these is specified under the "on late-init" event in `init.rc`. Actions internal to `init.rc`
have been omitted.
1. `early-fs` - Start vold.
2. `fs` - Vold is up. Mount partitions not marked as first-stage or latemounted.
3. `post-fs` - Configure anything dependent on early mounts.
4. `late-fs` - Mount partitions marked as latemounted.
5. `post-fs-data` - Mount and configure `/data`; set up encryption. `/metadata` is
reformatted here if it couldn't mount in first-stage init.
6. `zygote-start` - Start the zygote.
7. `early-boot` - After zygote has started.
8. `boot` - After `early-boot` actions have completed.
Commands
--------