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virtio-devices: Use SmallVec for descriptor chains

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Rather than instantiating a vector for parsing the descriptor chain in
advance instead use a SmallVec bounded by the expected length of the
descriptor chain. This removes vector allocations from those paths.

As smallvec was already a block dependency move it to a workspace
dependency and use it from there.

Fixes: #5079

Signed-off-by: Rob Bradford <rbradford@meta.com>
This commit is contained in:
Rob Bradford
2026-07-07 09:14:23 +01:00
committed by Wei Liu
parent ba3cfd7d9d
commit ad3dbcd130
7 changed files with 12 additions and 6 deletions
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Cargo.toml
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@@ -105,6 +105,7 @@ rustls = { version = "0.23.40", default-features = false, features = [
sha2 = "0.11.0"
signal-hook = "0.4.4"
signal-hook-registry = "1.4.8"
smallvec = "1.15.1"
thiserror = "2.0.18"
uuid = { version = "1.23.2" }
wait-timeout = "0.2.1"