20373283300

Committed 19 Dec 2025 02:40PM UTC coverage: 79.822% (+51.2%) from 28.618%

Build # 20373283300

Build Type

Pull #84

github

Committed by

web-flow

Commit Message

Merge 3ab21c41c into 5b8b670d9

Pull Request Pull Request #84: NVRC complete code coverage

Run Details

67 of 85 new or added lines in 11 files covered. (78.82%)

4 existing lines in 4 files now uncovered.

269 of 337 relevant lines covered (79.82%)

1.53 hits per line

Source File
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66.67

/src/modprobe.rs

use crate::execute::foreground;
use anyhow::Result;

const MODPROBE: &str = "/sbin/modprobe";

/// Load a kernel module via modprobe.
/// Used to load GPU drivers (nvidia, nvidia-uvm) during init.
pub fn load(module: &str) -> Result<()> {
    foreground(MODPROBE, &[module])
}

/// Reload NVIDIA modules to pick up configuration changes.
/// Used after nvidia-smi adjusts GPU settings (clocks, power limits)
/// that require a module reload to take effect.
pub fn reload_nvidia_modules() -> Result<()> {
    foreground(MODPROBE, &["-r", "nvidia-uvm", "nvidia"])?;
    load("nvidia")?;
    load("nvidia-uvm")
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::test_utils::require_root;
    use serial_test::serial;

    // Kernel module loading must be serialized - parallel modprobe
    // calls can race and cause spurious failures.

    #[test]
    #[serial]
    fn test_load_loop() {
        require_root();
        // 'loop' module is almost always available (loop devices)
        assert!(load("loop").is_ok());
    }

    #[test]
    #[serial]
    fn test_load_nonexistent() {
        require_root();
        // Should fail for a module that doesn't exist
        assert!(load("nonexistent_module_xyz123").is_err());
    }

    #[test]
    #[serial]
    fn test_reload_fails_without_hardware() {
        require_root();
        // Will fail: no nvidia modules on systems without NVIDIA
        let _ = reload_nvidia_modules();
    }
}

1	use crate::execute::foreground;
2	use anyhow::Result;
3
4	const MODPROBE: &str = "/sbin/modprobe";
5
6	/// Load a kernel module via modprobe.
7	/// Used to load GPU drivers (nvidia, nvidia-uvm) during init.
8	pub fn load(module: &str) -> Result<()> {	1✔
9	foreground(MODPROBE, &[module])	1✔
10	}
11
12	/// Reload NVIDIA modules to pick up configuration changes.
13	/// Used after nvidia-smi adjusts GPU settings (clocks, power limits)
14	/// that require a module reload to take effect.
15	pub fn reload_nvidia_modules() -> Result<()> {	1✔
16	foreground(MODPROBE, &["-r", "nvidia-uvm", "nvidia"])?;	1✔
NEW 17	load("nvidia")?;	×
NEW 18	load("nvidia-uvm")	×
19	}
20
21	#[cfg(test)]
22	mod tests {
23	use super::*;
24	use crate::test_utils::require_root;
25	use serial_test::serial;
26
27	// Kernel module loading must be serialized - parallel modprobe
28	// calls can race and cause spurious failures.
29
30	#[test]
31	#[serial]
32	fn test_load_loop() {
33	require_root();
34	// 'loop' module is almost always available (loop devices)
35	assert!(load("loop").is_ok());
36	}
37
38	#[test]
39	#[serial]
40	fn test_load_nonexistent() {
41	require_root();
42	// Should fail for a module that doesn't exist
43	assert!(load("nonexistent_module_xyz123").is_err());
44	}
45
46	#[test]
47	#[serial]
48	fn test_reload_fails_without_hardware() {
49	require_root();
50	// Will fail: no nvidia modules on systems without NVIDIA
51	let _ = reload_nvidia_modules();
52	}
53	}

NVIDIA / nvrc / 20373283300

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