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34268365a9
When a process is deregistered from the binder context, the all_procs vector may have significant unused capacity. Add logic to shrink the vector using a conservative strategy that prevents shrink-then-regrow oscillation. The shrinking strategy triggers when length drops below 1/4 of capacity, and shrinks to twice the current length rather than to the exact length. This provides hysteresis to avoid repeated reallocations when the process count fluctuates. The shrink operation uses GFP_KERNEL and is allowed to fail gracefully since it is purely an optimization. The vector remains valid and functional even if shrinking fails. Suggested-by: Alice Ryhl <aliceryhl@google.com> Reviewed-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Shivam Kalra <shivamkalra98@zohomail.in> Acked-by: Danilo Krummrich <dakr@kernel.org> Link: https://patch.msgid.link/20260216-binder-shrink-vec-v3-v6-3-ece8e8593e53@zohomail.in Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
175 lines
5.4 KiB
175 lines
5.4 KiB