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bug pass: whole console lines, a quiet SCI, an honest reserve warning

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- schinit, schinitd and vgpud build every message from pieces, one
  write() each, so a job starting on another CPU landed mid-line:
  "schinitd: starting vgpud: os.schos.resolvconfno virtio-gpu on this
  machine". They now collect a line and write it at the newline;
  resolvconf's verbose line is one write with its prefix.
- The ACPI SCI registers IRQ_QUIET. A desktop's SCI never fires, and the
  poller took two seconds of silence for a misrouted line ("irq 9:
  nothing has arrived on it") and called the handler every tick. A line
  is only exempt while every handler on it is quiet.
- The loader claims each segment from where the last one's claim ended,
  so two segments sharing a page no longer ask for it twice. When a
  claim is still refused, it names the memory-map entries in the way.
- Stale divesymlink() declaration gone; the kernel.md struct table
  re-measured (inode, buf and file pools grow from slabs now).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-23 16:03:33 +02:00
commit e659c6b187
10 changed files with 184 additions and 25 deletions
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16
docs/architecture/kernel.md
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@ -184,15 +184,17 @@ partly true:
| | size | table | |
|---|---|---|---|
| `struct proc` | 10656 | `NPROC` 128 | larger than a page |
| `struct socket` | 4928 | `NSOCK` 32 | larger than a page |
| `struct buf` | 4272 | `NBUF` 256 | larger than a page |
| `struct inode` | 280 | `NINODE` 200 | a cache, bounded on purpose |
| `struct device` | 120 | `NDEVICE` 32 | 3.8 KB, never hit |
| `struct file` | 48 | `NFILE` 512 | 24 KB, never hit |
| `struct proc` | 11744 | `NPROC` 128 | larger than a page; 1 KB of it is FPU state |
| `struct socket` | 4936 | `NSOCK` 128 | larger than a page |
| `struct device` | 120 | `NDEVICE` 128 | 15 KB, never hit |
| `struct buf` | 200 | `NBUF` 256 to start | grows from a slab, data from `kalloc`, up to RAM/32 |
| `struct inode` | 296 | none | grows from a slab; `NINODE` 200 is only how many are made up front |
| `struct file` | 64 | none | grows from a slab; `NFILE` 512 is only the static pool |
The three largest cannot go in a page-backed slab at all. Freeing them needs a
The two largest cannot go in a page-backed slab at all. Freeing them needs a
contiguous multi-page allocator, which is a separate thing and is not written.
The buffer header shrank to 200 bytes when its 4 KB of data moved out to a page
of its own, which is what let the cache grow at all.
## Processes