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Keyboard lights, TLB shootdowns, battery in sysfs, /proc/pid/maps

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Caps, Num and Scroll Lock now light their LEDs on PS/2 and USB keyboards,
share one state between keyboards, and stop toggling on key repeat. X sets
them through evdev writes while it holds the keyboard.

Unmapping memory in a process with threads on other CPUs now flushes their
TLBs with an IPI. Without it a freed page stayed reachable through stale
translations, which corrupted Epiphany's heap on SMP.

ACPI batteries and AC adapters appear under /sys/class/power_supply.
/proc/<pid>/maps lists file mappings, and a process killed by a fault
names the file and offset it died in. r8169 gets a 256-entry RX ring.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-25 13:43:27 +01:00
commit 438e7af141
18 changed files with 945 additions and 9 deletions
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6
kernel/sys/sys_mem.c
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@ -282,6 +282,10 @@ mmap_locked(void)
vm_unmap_range(myproc()->pgdir, va, length);
int fixed_file = f && f->type == FD_INODE && f->ip->type != T_DEV &&
!(flags & MAP_ANONYMOUS);
if (fixed_file)
mapname_add(myproc()->mm, va, length, offset, f->path);
else
mapname_unmap(myproc()->mm, va, length);
// Reserved, not backed. PROT_NONE is recorded too: mprotect() does not
// change pages here, so a range reserved PROT_NONE and opened up later
// has to be memory that can appear when it is touched.
@ -440,6 +444,7 @@ mmap_locked(void)
vm_unmap_range(myproc()->pgdir, va, length);
return -ENOMEM;
}
mapname_add(myproc()->mm, va, length, offset, f->path);
return va;
}
@ -531,6 +536,7 @@ munmap_locked(void)
if (bad_user_range(addr, length) || (addr % PGSIZE))
return -EINVAL;
uint64 end = addr + length;
mapname_unmap(p->mm, addr, length);
// A segment or device mapping goes only as a whole, by its own address.
// Part of one is refused: unmapping it the anonymous way below would kfree