firecracker

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Use `writev` for writing guest outgoing packets to the tap device

2

# Avoid extra memory copy when writing to tap device in virtio-net TX path Currently, when performing TX, a network frame might be exist in various scattered in various memory...

bchalios

Investigate snapshot restore performance on host kernel >= 5.4

12

The snapshot restore operation is slower on AMD than on Intel. We should investigate why and either fix the root cause or change the `test_snapshot_resume_latency` test in order to check...

serban300

[Bug] The behaviour of MMDS(v1) has changed between v0.25.2 and v1.1.0

2

# Describe the bug We rely heavily on the MMDS in Firecracker for cloud-init with the **nocloud** data source (i.e. `ds=nocloud-net;s=http://169.254.169.254/latest/`). With Firecracker v0.25.2 this works but upgrading our solution...

richardcase

[Bug] Concurrency Issues with Mounting via devtool build_rootfs

1

# Describe the bug Using `tools/devtool build_rootfs` multiple times concurrently results in the rootfs failing to mount. ## To Reproduce 1. Create a loop that runs many times concurrently (I...

sondavidb

# Feature Request It would be nice to support the PVH direct boot API. Guest operating systems which have support for Xen/PVH will find this much easier than trying to...

cperciva

Jailer Configuration - documentation clarification

2

Not a bug, but not a feature request. It's related to documentation. On [this page](https://github.com/firecracker-microvm/firecracker/blob/main/docs/prod-host-setup.md) in the [Jailer Configuration](https://github.com/firecracker-microvm/firecracker/blob/main/docs/prod-host-setup.md#jailer-configuration) section it states: > For assuring secure isolation in production deployments,...

mtcolman

Signed-off-by: Marco Cali # Reason for This PR Modify the documentation to include explicitly the max number of vCPU supported and other minor grammatical changes. Fixes #3059 ## Description of...

xmarcalx

# Feature Request Improve the documentation and give better clarity of how many vCPU are supported into Firecracker. ## Describe the desired solution Documentation should state the max number of...

xmarcalx

Add bash linter integration test

3

Install `shellcheck` (or a similar checker) inside devctr and add a python integration test that runs it on the shell scripts we have in Firecracker, like `tools/devtool` and other `.sh`...

alindima

Memory map excludes 640th kB

1

# Describe the bug The memory map provided by Firecracker is ``` [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003fffffff] usable ``` In other words, the first...

cperciva