refactor(fs/mem): use imported locks

[mkroening]

Extracted and extended from #2078.

[mkroening]

Thanks for this, @fogti! :)

[github-actions]

Benchmark Results

Benchmark	Current: b4d1303	Previous: f250a72	Performance Ratio
startup_benchmark Build Time	119.01 s	114.41 s	1.04
startup_benchmark File Size	0.91 MB	0.91 MB	1.00
Startup Time - 1 core	0.99 s (±0.02 s)	0.98 s (±0.03 s)	1.01
Startup Time - 2 cores	0.98 s (±0.03 s)	0.97 s (±0.03 s)	1.01
Startup Time - 4 cores	1.00 s (±0.03 s)	0.98 s (±0.02 s)	1.02
multithreaded_benchmark Build Time	116.79 s	113.19 s	1.03
multithreaded_benchmark File Size	1.02 MB	1.02 MB	1.00
Multithreaded Pi Efficiency - 2 Threads	91.35 % (±9.15 %)	87.29 % (±8.93 %)	1.05
Multithreaded Pi Efficiency - 4 Threads	45.56 % (±2.66 %)	44.54 % (±3.35 %)	1.02
Multithreaded Pi Efficiency - 8 Threads	25.84 % (±2.00 %)	25.47 % (±2.04 %)	1.01
micro_benchmarks Build Time	329.94 s	309.36 s	1.07
micro_benchmarks File Size	1.02 MB	1.02 MB	1.00
Scheduling time - 1 thread	191.13 ticks (±27.44 ticks)	187.65 ticks (±29.91 ticks)	1.02
Scheduling time - 2 threads	107.79 ticks (±19.41 ticks)	104.76 ticks (±17.67 ticks)	1.03
Micro - Time for syscall (getpid)	12.49 ticks (±5.91 ticks)	10.70 ticks (±5.34 ticks)	1.17
Memcpy speed - (built_in) block size 4096	58053.24 MByte/s (±41893.10 MByte/s)	54842.67 MByte/s (±40303.19 MByte/s)	1.06
Memcpy speed - (built_in) block size 1048576	13826.88 MByte/s (±11444.51 MByte/s)	13435.52 MByte/s (±11081.00 MByte/s)	1.03
Memcpy speed - (built_in) block size 16777216	9409.27 MByte/s (±7566.86 MByte/s)	8827.85 MByte/s (±7024.29 MByte/s)	1.07
Memset speed - (built_in) block size 4096	58294.87 MByte/s (±42036.79 MByte/s)	55412.19 MByte/s (±40719.84 MByte/s)	1.05
Memset speed - (built_in) block size 1048576	14238.03 MByte/s (±11700.59 MByte/s)	13825.19 MByte/s (±11354.50 MByte/s)	1.03
Memset speed - (built_in) block size 16777216	9565.95 MByte/s (±7639.30 MByte/s)	9064.78 MByte/s (±7183.52 MByte/s)	1.06
Memcpy speed - (rust) block size 4096	51462.66 MByte/s (±38777.97 MByte/s)	46733.78 MByte/s (±35123.32 MByte/s)	1.10
Memcpy speed - (rust) block size 1048576	13680.94 MByte/s (±11208.64 MByte/s)	13310.91 MByte/s (±11037.27 MByte/s)	1.03
Memcpy speed - (rust) block size 16777216	9205.19 MByte/s (±7390.92 MByte/s)	8766.51 MByte/s (±6990.65 MByte/s)	1.05
Memset speed - (rust) block size 4096	51713.28 MByte/s (±38936.04 MByte/s)	47375.28 MByte/s (±35607.36 MByte/s)	1.09
Memset speed - (rust) block size 1048576	13906.16 MByte/s (±11316.46 MByte/s)	13688.04 MByte/s (±11281.91 MByte/s)	1.02
Memset speed - (rust) block size 16777216	9375.53 MByte/s (±7475.66 MByte/s)	8977.13 MByte/s (±7121.99 MByte/s)	1.04
alloc_benchmarks Build Time	309.46 s	306.61 s	1.01
alloc_benchmarks File Size	0.98 MB	0.98 MB	1.00
Allocations - Allocation success	100.00 %	100.00 %	1
Allocations - Deallocation success	100.00 %	100.00 %	1
Allocations - Pre-fail Allocations	100.00 %	100.00 %	1
Allocations - Average Allocation time	27169.57 Ticks (±1557.69 Ticks)	29955.30 Ticks (±1520.78 Ticks)	0.91
Allocations - Average Allocation time (no fail)	27169.57 Ticks (±1557.69 Ticks)	29955.30 Ticks (±1520.78 Ticks)	0.91
Allocations - Average Deallocation time	2997.40 Ticks (±1069.88 Ticks)	3417.72 Ticks (±1315.22 Ticks)	0.88
mutex_benchmark Build Time	304.43 s	309.20 s	0.98
mutex_benchmark File Size	1.02 MB	1.02 MB	1.00
Mutex Stress Test Average Time per Iteration - 1 Threads	39.20 ns (±4.76 ns)	38.04 ns (±4.45 ns)	1.03
Mutex Stress Test Average Time per Iteration - 2 Threads	32.20 ns (±3.10 ns)	31.30 ns (±2.92 ns)	1.03

This comment was automatically generated by workflow using github-action-benchmark.

[fogti]

2025-11-28T11:46:49.6715278Z $ sudo /home/runner/.cargo/bin/uhyve --cpu-count=1 /home/runner/work/kernel/kernel/target/x86_64-unknown-hermit/release/rusty_demo
2025-11-28T11:46:49.6798573Z [ERROR uhyvelib::vm] CPU 0 crashed with IOError(Custom { kind: Other, error: "VcpuExitFailEntry { hardware_entry_failure_reason: 0, cpu: 0 }" })
2025-11-28T11:46:49.6853214Z 
2025-11-28T11:46:49.6853587Z thread 'main' (22522) panicked at src/vm.rs:376:18:
2025-11-28T11:46:49.6853941Z No return code from any CPU? Maybe all have been kick
2025-11-28T11:46:49.6854206Z d?

ffs

[fogti]

@mkroening You'll have to re-schedule it.