feat: P0-P6 kernel scheduler + relibc threading comprehensive implementation

P0-P2: Barrier SMP, sigmask/pthread_kill races, robust mutexes, RT scheduling, POSIX sched API P3: PerCpuSched struct, per-CPU wiring, work stealing, load balancing, initial placement P4: 64-shard futex table, REQUEUE, PI futexes (LOCK_PI/UNLOCK_PI/TRYLOCK_PI), robust futexes, vruntime tracking, min-vruntime SCHED_OTHER selection P5: setpriority/getpriority, pthread_setaffinity_np, pthread_setname_np, pthread_setschedparam (Redox) P6: Cache-affine scheduling (last_cpu + vruntime bonus), NUMA topology kernel hints + numad userspace daemon Stability fixes: make_consistent stores 0 (dead TID fix), cond.rs error propagation, SPIN_COUNT adaptive spinning, Sys::open &str fix, PI futex CAS race, proc.rs lock ordering, barrier destroy Patches: 33 kernel + 58 relibc patches, all tracked in recipes Docs: KERNEL-SCHEDULER-MULTITHREAD-IMPROVEMENT-PLAN.md updated, SCHEDULER-REVIEW-FINAL.md created Architecture: NUMA topology parsing stays userspace (numad daemon), kernel stores lightweight NumaTopology hints
2026-04-30 18:21:48 +01:00
parent 55d00c3a24
commit 34360e1e4f
70 changed files with 15268 additions and 10 deletions
@@ -0,0 +1,61 @@
+diff --git a/drivers/pcid/src/scheme.rs b/drivers/pcid/src/scheme.rs
+index ce55b33f..c06bdec4 100644
+--- a/drivers/pcid/src/scheme.rs
+++ b/drivers/pcid/src/scheme.rs
+@@ -21,6 +21,10 @@ enum Handle {
+     Access,
+     Device,
+     Channel { addr: PciAddress, st: ChannelState },
+    // Uevent surface for hotplug consumers. Opening uevent returns an object
+    // from which device add/remove events can be read. Since pcid currently
+    // only scans at startup, this surface is ready for hotplug polling consumers.
+    Uevent,
+     SchemeRoot,
+     /// Represents an open handle to a device's bind endpoint
+     Bind { addr: PciAddress },
+@@ -34,7 +38,7 @@ struct HandleWrapper {
+     }
+     fn is_file(&self) -> bool {
+-        matches!(self, Self::Access | Self::Channel { .. } | Self::Bind { .. })
+        matches!(self, Self::Access | Self::Channel { .. } | Self::Bind { .. } | Self::Uevent)
+     }
+     fn is_dir(&self) -> bool {
+         !self.is_file()
+@@ -96,6 +100,8 @@ impl SchemeSync for PciScheme {
+             }
+         } else if path == "access" {
+             Handle::Access
+        } else if path == "uevent" {
+            Handle::Uevent
+         } else {
+             let idx = path.find('/').unwrap_or(path.len());
+             let (addr_str, after) = path.split_at(idx);
+@@ -140,6 +146,7 @@ impl SchemeSync for PciScheme {
+             Handle::Device => (DEVICE_CONTENTS.len(), MODE_DIR | 0o755),
+             Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } => (0, MODE_CHR | 0o600),
+            Handle::Uevent => (0, MODE_CHR | 0o644),
+             Handle::SchemeRoot => return Err(Error::new(EBADF)),
+         };
+         stat.st_size = len as u64;
+@@ -164,6 +171,12 @@ impl SchemeSync for PciScheme {
+             Handle::Channel {
+                 addr: _,
+                 ref mut st,
+             } => Self::read_channel(st, buf),
+            Handle::Uevent => {
+                // Uevent surface is ready for hotplug polling consumers.
+                // pcid currently only scans at startup, so return empty (EAGAIN would indicate no data available).
+                // Consumers can poll and re-read to check for new events.
+                Ok(0)
+            }
+             Handle::SchemeRoot | Handle::Bind { .. } => Err(Error::new(EBADF)),
+             _ => Err(Error::new(EBADF)),
+         }
+@@ -199,7 +212,7 @@ impl SchemeSync for PciScheme {
+             }
+             Handle::Device => DEVICE_CONTENTS,
+-            Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } => return Err(Error::new(ENOTDIR)),
+            Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } | Handle::Uevent => return Err(Error::new(ENOTDIR)),
+             Handle::SchemeRoot => return Err(Error::new(EBADF)),
+         };
+         for (i, dent_name) in entries.iter().enumerate().skip(offset) {