Remove io_uring support

patches/server/0051-LinearPaper-Remove-all-locks-on-region-files.patch

@@ -0,0 +1,96 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: MrHua269 <novau233@163.com>
+Date: Wed, 7 Feb 2024 06:30:38 +0000
+Subject: [PATCH] LinearPaper Remove all locks on region files
+
+
+diff --git a/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java
+index b46acbc078f3d3bfb0f3ede3f1cc172f4b48c5df..812d8504c6abd16b34ee4abd976563f345f00d18 100644
+--- a/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java
++++ b/src/main/java/io/papermc/paper/chunk/system/io/RegionFileIOThread.java
+@@ -835,7 +835,8 @@ public final class RegionFileIOThread extends PrioritisedQueueExecutorThread {
+                     return Boolean.TRUE;
+                 }
+ 
+-                return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE;
++                //return file.hasChunk(chunkPos) ? Boolean.TRUE : Boolean.FALSE;
++                return Boolean.TRUE;
+             });
+         }
+     }
+@@ -1146,7 +1147,7 @@ public final class RegionFileIOThread extends PrioritisedQueueExecutorThread {
+                 return function.apply(regionFile);
+             } finally {
+                 if (regionFile != null) {
+-                    regionFile.getFileLock().unlock(); // Kaiiju
++//                    regionFile.getFileLock().unlock(); // Kaiiju
+                 }
+             }
+         }
+@@ -1158,7 +1159,7 @@ public final class RegionFileIOThread extends PrioritisedQueueExecutorThread {
+             synchronized (cache) {
+                 regionFile = cache.getRegionFileIfLoaded(new ChunkPos(chunkX, chunkZ));
+                 if (regionFile != null) {
+-                    regionFile.getFileLock().lock(); // Kaiiju
++//                    regionFile.getFileLock().lock(); // Kaiiju
+                 }
+             }
+ 
+@@ -1166,7 +1167,7 @@ public final class RegionFileIOThread extends PrioritisedQueueExecutorThread {
+                 return function.apply(regionFile);
+             } finally {
+                 if (regionFile != null) {
+-                    regionFile.getFileLock().unlock(); // Kaiiju
++//                    regionFile.getFileLock().unlock(); // Kaiiju
+                 }
+             }
+         }
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+index db9e4386ca95bdaba0a4a4e13e3a90d2bcfbae91..73fc6d393cb338fee7d866b99a4e25684d47e79b 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
+@@ -120,7 +120,7 @@ public class RegionFileStorage implements AutoCloseable {
+             // Paper start
+             if (lock) {
+                 // must be in this synchronized block
+-                regionfile.getFileLock().lock(); // Kaiiju
++//                regionfile.getFileLock().lock(); // Kaiiju
+             }
+             // Paper end
+             return regionfile;
+@@ -169,7 +169,7 @@ public class RegionFileStorage implements AutoCloseable {
+             // Paper start
+             if (lock) {
+                 // must be in this synchronized block
+-                regionfile1.getFileLock().lock(); // Kaiiju
++//                regionfile1.getFileLock().lock(); // Kaiiju
+             }
+             // Paper end
+             return regionfile1;
+@@ -249,7 +249,7 @@ public class RegionFileStorage implements AutoCloseable {
+                         if (!chunkPos.equals(pos)) {
+                             net.minecraft.server.MinecraftServer.LOGGER.error("Attempting to read chunk data at " + pos + " but got chunk data for " + chunkPos + " instead! Attempting regionfile recalculation for regionfile " + regionfile.getRegionFile().toAbsolutePath()); // Kaiiju
+                             if (regionfile.recalculateHeader()) {
+-                                regionfile.getFileLock().lock(); // otherwise we will unlock twice and only lock once. // Kaiiju
++//                                regionfile.getFileLock().lock(); // otherwise we will unlock twice and only lock once. // Kaiiju
+                                 return this.read(pos, regionfile);
+                             }
+                             net.minecraft.server.MinecraftServer.LOGGER.error("Can't recalculate regionfile header, regenerating chunk " + pos + " for " + regionfile.getRegionFile().toAbsolutePath()); // Kaiiju
+@@ -286,7 +286,7 @@ public class RegionFileStorage implements AutoCloseable {
+ 
+         return nbttagcompound;
+         } finally { // Paper start
+-            regionfile.getFileLock().unlock(); // Kaiiju
++//            regionfile.getFileLock().unlock(); // Kaiiju
+         } // Paper end
+     }
+ 
+@@ -378,7 +378,7 @@ public class RegionFileStorage implements AutoCloseable {
+         // Paper end - Chunk save reattempt
+         // Paper start - rewrite chunk system
+         } finally {
+-            regionfile.getFileLock().unlock(); // Kaiiju
++            //regionfile.getFileLock().unlock(); // Kaiiju
+         }
+         // Paper end - rewrite chunk system
+     }