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Changes

Set AWS_LC_SYS_NO_JITTER_ENTROPY=1 in the build environment to disable jitter entropy and unpin aws-lc-rs version.

Reason

Unpin AWS LC dependency.

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  • I have run tools/devtool checkbuild --all to verify that the PR passes
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  • This functionality cannot be added in rust-vmm.

Set AWS_LC_SYS_NO_JITTER_ENTROPY=1 in the build environment to disable
jitter entropy and unpin aws-lc-rs version.

Signed-off-by: Riccardo Mancini <[email protected]>
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Performance A/B run to verify the fix: https://buildkite.com/firecracker/performance-a-b-tests/builds/730/steps/canvas

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codecov bot commented Oct 16, 2025

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.74%. Comparing base (837c2e7) to head (90553bc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff           @@
##             main    #5483   +/-   ##
=======================================
  Coverage   82.74%   82.74%           
=======================================
  Files         269      269           
  Lines       27798    27798           
=======================================
  Hits        23001    23001           
  Misses       4797     4797           
Flag Coverage Δ
5.10-m5n.metal 82.90% <ø> (ø)
5.10-m6a.metal 82.16% <ø> (+<0.01%) ⬆️
5.10-m6g.metal 79.56% <ø> (-0.01%) ⬇️
5.10-m6i.metal 82.89% <ø> (-0.01%) ⬇️
5.10-m7a.metal-48xl 82.15% <ø> (-0.01%) ⬇️
5.10-m7g.metal 79.56% <ø> (ø)
5.10-m7i.metal-24xl 82.86% <ø> (-0.02%) ⬇️
5.10-m7i.metal-48xl 82.86% <ø> (-0.01%) ⬇️
5.10-m8g.metal-24xl 79.56% <ø> (ø)
5.10-m8g.metal-48xl 79.56% <ø> (-0.01%) ⬇️
6.1-m5n.metal 82.92% <ø> (-0.01%) ⬇️
6.1-m6a.metal 82.19% <ø> (ø)
6.1-m6g.metal 79.56% <ø> (ø)
6.1-m6i.metal 82.92% <ø> (-0.01%) ⬇️
6.1-m7a.metal-48xl 82.18% <ø> (ø)
6.1-m7g.metal 79.56% <ø> (-0.01%) ⬇️
6.1-m7i.metal-24xl 82.93% <ø> (-0.01%) ⬇️
6.1-m7i.metal-48xl 82.93% <ø> (ø)
6.1-m8g.metal-24xl 79.55% <ø> (-0.01%) ⬇️
6.1-m8g.metal-48xl 79.56% <ø> (-0.01%) ⬇️

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@Manciukic Manciukic marked this pull request as ready for review October 16, 2025 16:59
@Manciukic Manciukic added the Status: Awaiting review Indicates that a pull request is ready to be reviewed label Oct 16, 2025
@JackThomson2 JackThomson2 merged commit 62abb81 into firecracker-microvm:main Oct 17, 2025
8 of 9 checks passed
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3 participants