warning: this argument is a mutable reference, but not used mutably
--> virtio-devices/src/transport/pci_common_config.rs💯17
|
100 | queues: &mut [Queue],
| ^^^^^^^^^^^^ help: consider changing to: `&[Queue]`
|
= warning: changing this function will impact semver compatibility
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_pass_by_ref_mut
= note: `#[warn(clippy::needless_pass_by_ref_mut)]` on by default
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Similar to balloon inflation, memory allocation is also constrained to
align with the page size. Therefore, memory is allocated in units of the
host page size, one page at a time, until all host pages that the memory
range requested by the guest are managed. If the requested size is
smaller than the page size, the entire page will still be allocated
because smaller allocations are not possible due to the page size
limitation.
Fixes: cloud-hypervisor#5369
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Currently, virtio-balloon can't work well with page size other than 4k.
The virtio-balloon always works in units of 4kiB (BALLOON_PAGE_SIZE), but
we can only actually discard memory in units of the host page size.
We get some idea from [1] to solve this issue.
What has been done in this commit:
For balloon inflation:
A bitmap is employed to track the memory range to be released in 4k
granularity. Once it accumulates to one host page size, the corresponding
page is released, and the bitmap is cleared to handle the next record.
This process continues until all the memory range is managed. Memory will
only be released when a consecutive set of balloon request entries from
the same host page reaches the full host page size. If a balloon request
entry from a different host page is encountered, the bitmap and the base
host page address will be reset. Consequently, memory is released in
units of the page size, ensuring efficient memory management. That's say
if memory range length to be released smaller than page size or if the
guest scatters requests each of whose size is smaller than page size
across different host pages no memory will be released.
[1] https://patchwork.kernel.org/project/qemu-devel/patch/20190214043916.22128-6-david@gibson.dropbear.id.au/
Fixes: cloud-hypervisor#5369
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
This commit merges crates `qcow`, `vhdx` and `block_util` into the
crate `block`, which can allow `qcow` to use functions from `block_util`
without introducing a circular crate dependency.
This commit is based on crosvm implementation:
f2eecc4152
Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
warning: usage of `Arc<T>` where `T` is not `Send` or `Sync`
--> virtio-devices/src/vsock/device.rs:376:22
|
376 | backend: Arc::new(RwLock::new(backend)),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: consider using `Rc<T>` instead or wrapping `T` in a std::sync type like `Mutex<T>`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#arc_with_non_send_sync
= note: `#[warn(clippy::arc_with_non_send_sync)]` on by default
The vsock backend may be shared between threads, so the type `B` in
`Vsock` should be `VsockBackend` and `Sync`.
Considering that `api_receiver` and `gdb_receiver` are only used in vmm
threads, the `Arc` can be replaced by `Rc`.
Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
warning: useless use of `vec!`
--> test_infra/src/lib.rs:111:30
|
111 | let mut events = vec![epoll::Event::new(epoll::Events::empty(), 0); 1];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[epoll::Event::new(epoll::Events::empty(), 0); 1]`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
= note: `#[warn(clippy::useless_vec)]` on by default
Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
warning: casting raw pointers to the same type and constness is unnecessary (`*const protocol::MemoryRange` -> `*const protocol::MemoryRange`)
--> vm-migration/src/protocol.rs:280:17
|
280 | self.data.as_ptr() as *const MemoryRange as *const u8,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `self.data.as_ptr()`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
= note: `#[warn(clippy::unnecessary_cast)]` on by default
Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
This gives users the chance to reduce the number of dependencies
included, which is generally good practice and also reduces code size.
Furthermore, `io_uring` specifically is a strong contender for something
one may wish to disable due to the syscall API's many security issues[1]
[1]: https://security.googleblog.com/2023/06/learnings-from-kctf-vrps-42-linux.html
Signed-off-by: Manish Goregaokar <manishsmail@gmail.com>
Remove "enum_variant_names" clippy. Enumeration variant names should
specify their variant, not repeat the enumeration name.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@intel.com>
SerialBuffer uses VecDeque::extend, which calls realloc, which a
maximum buffer size of 1 MiB. Starting at allocation sizes of
128 KiB, musl's mallocng allocator will use mremap for the allocation.
Since this was not permitted by the seccomp rules, heavy write load
could crash cloud-hypervisor with a seccomp failure. (Encountered
using virtio-console, but I don't see any reason it wouldn't happen
for the legacy serial device too.)
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Bump to the latest rust-vmm crates, including vm-memory, vfio,
vfio-bindings, vfio-user, virtio-bindings, virtio-queue, linux-loader,
vhost, and vhost-user-backend,
Signed-off-by: Bo Chen <chen.bo@intel.com>
Don't import via glob to avoid (unused) objects colliding in the
namespace. This fixes a beta clippy issue.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Cloud Hypervisor's vhost-user implementation will reconnect if it gets
disconnected from the backend. That means connections happen inside
the vhost-user seccomp sandbox, so all syscalls used in reconnecting
have to be allowed in that sandbox.
clock_nanosleep is used by Glibc, and nanosleep is used by musl.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Doc comments are Markdown, and can include HTML tags. Anything in
angle brackets will therefore be inserted as an HTML tag into
rustdoc's output. If that's not intentional, the left angle bracket
needs to be escaped.
I haven't fixed the doc comments in src/main.rs, because argh doesn't
understand the escaping, so the backslashes would show up in the
--help output. I've opened https://github.com/google/argh/issues/159
about that.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
These need to be //! comments, because they apply to the module as a
whole, not to whatever directly follows the comment. Using ///
comments here resulted in documentation being attached to the wrong
thing, or not rendered at all.
I've also checked the Markdown formatting of these comments as
rendered by rustdoc, and fixed it where appropriate.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
This change is important to do a proper resource cleanup. We decided
to do this repetitive approach as VirtioCommon can't implement Drop
without major changes to the corresponding code. Also, devices such as
Net can't easily use the epoll_threads-abstraction from VirtioCommon as
it has multiple threads with different semantics.
Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
Add new configuration for offloading features, including
Checksum/TSO/UFO, and set these offloading features as
enabled by default.
Fixes: #4792.
Signed-off-by: Yong He <alexyonghe@tencent.com>
Add new latency counters for virtio-block device, including
minimal latency, maximal latency, and average latency for block
read and write.
The average latency is calculated based on cumulative average.
Signed-off-by: Yong He <alexyonghe@tencent.com>
Rather than aggregate the completion list into an intermediate vector
instead adjust the API to provide one completion item at a time.
With DHAT this shows the number of heap allocations has decreased.
Before:
dhat: Total: 623,852 bytes in 8,157 blocks
After:
dhat: Total: 380,444 bytes in 3,469 blocks
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
During analysis of the asynchrous block I/O handling it was observed
that the majority of the time the completion events occur in the same
order as submissions. Further the maximum number of inflight requests
during the boot time is much lower than the size of the queue.
Through the use of a double ended queue (VecDequeue) with a reasonable
pre-allocation capacity we can have O(1) allocation free addition of
items to the list of inflight requests and mostly O(1) matching of
completed requests to submissions.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
