rust_binder: update Process::node_refs to use SpinLock

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Unfortunately the current use of a mutex for this lock leads to priority
inversion. Traces have been observed where a process is trying to obtain
this mutex for 22ms, but it's unable to do so because the thread holding
the lock is scheduled out. Since this occurred on a UI thread, that is
an extremely long delay.

Code paths that might sleep under this lock have already been updated in
patches leading up to this one.

Reviewed-by: Matthew Maurer <mmaurer@google.com>
Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Link: https://patch.msgid.link/20260615-binder-noderefs-spin-v3-6-3235f5a3e0a0@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Alice Ryhl 2026-06-15 12:36:46 +00:00 • committed by Greg Kroah-Hartman

parent 63b4af40e2

commit f8d269390c

1 changed files with 3 additions and 3 deletions

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drivers/android/binder/process.rs

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