feat: expand procfs with real data and per-PID entries#167
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…-PID status Replace hardcoded /proc/meminfo with real frame allocator data by adding memory_stats() to frame_allocator.rs. Add four new procfs entries: - /proc/stat: kernel activity counters (syscalls, interrupts, context switches, forks, execs, CoW faults) from the tracing framework - /proc/cowinfo: copy-on-write statistics (faults, pages copied, sole-owner optimizations) - /proc/mounts: mounted filesystem listing from VFS - /proc/[pid]/status: per-process info (name, state, parent, children, fd count, memory usage) with dynamic PID path resolution The per-PID support uses on-demand synthesis rather than static registration, with careful lock ordering (PROCFS lock released before acquiring process manager lock) to prevent deadlocks. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
/proc/meminfoto report real memory from frame allocator instead of hardcoded 1GB/512MB/proc/statwith live kernel activity counters (syscalls, interrupts, context switches, forks, execs, CoW faults)/proc/cowinfowith copy-on-write statistics/proc/mountswith mounted filesystem listing/proc/[pid]/statuswith per-process info (name, state, parent, children, fd count, memory usage)FdTable::open_fd_count()helper for per-process fd reportingframe_allocator::memory_stats()for real memory statisticsTest plan
cat /proc/meminfoshows real memory valuescat /proc/statshows kernel counterscat /proc/cowinfoshows CoW statisticscat /proc/mountsshows mounted filesystemscat /proc/1/statusshows init process info🤖 Generated with Claude Code