scx_loader: add scx_flash as supported scheduler

rust/scx_loader/configuration.md

@@ -36,12 +36,18 @@ auto_mode = []
 gaming_mode = ["--performance"]
 lowlatency_mode = ["--performance"]
 powersave_mode = ["--powersave"]
+
+[scheds.scx_flash]
+auto_mode = []
+gaming_mode = []
+lowlatency_mode = []
+powersave_mode = []
 ```
 
 **`default_sched`:**
 
 * This field specifies the scheduler that will be started automatically when `scx_loader` starts (e.g., on boot).
-* It should be set to the name of a supported scheduler (e.g., `"scx_bpfland"`, `"scx_rusty"`, `"scx_lavd"`).
+* It should be set to the name of a supported scheduler (e.g., `"scx_bpfland"`, `"scx_rusty"`, `"scx_lavd"`, `"scx_flash"`).
 * If this field is not present or is set to an empty string, no scheduler will be started automatically.
 
 **`default_mode`:**
@@ -52,7 +58,7 @@ powersave_mode = ["--powersave"]
 
 **`[scheds.scx_name]`:**
 
-* This section defines the custom flags for a specific scheduler. Replace `scx_name` with the actual name of the scheduler (e.g., `scx_bpfland`, `scx_rusty`, `scx_lavd`).
+* This section defines the custom flags for a specific scheduler. Replace `scx_name` with the actual name of the scheduler (e.g., `scx_bpfland`, `scx_rusty`, `scx_lavd`, `scx_flash`).
 
 **`auto_mode`, `gaming_mode`, `lowlatency_mode`, `powersave_mode`:**
 
@@ -74,6 +80,8 @@ The example configuration above shows how to set custom flags for different sche
     * Gaming mode: `--performance`
     * Low Latency mode: `--performance`
     * Power Save mode: `--powersave`
+* For `scx_flash`:
+    * No custom flags are defined, so the default flags for each mode will be used.
 
 ## Fallback Behavior
 

rust/scx_loader/src/config.rs

@@ -88,6 +88,10 @@ pub fn get_default_config() -> Config {
                 "scx_lavd".to_string(),
                 get_default_sched_for_config(&SupportedSched::Lavd),
             ),
+            (
+                "scx_flash".to_string(),
+                get_default_sched_for_config(&SupportedSched::Flash),
+            ),
         ]),
     }
 }
@@ -176,6 +180,8 @@ fn get_default_scx_flags_for_mode(scx_sched: &SupportedSched, sched_mode: SchedM
         },
         // scx_rusty doesn't support any of these modes
         SupportedSched::Rusty => vec![],
+        // scx_flash doesn't support any of these modes
+        SupportedSched::Flash => vec![],
     }
 }
 
@@ -205,6 +211,12 @@ auto_mode = []
 gaming_mode = ["--performance"]
 lowlatency_mode = ["--performance"]
 powersave_mode = ["--powersave"]
+
+[scheds.scx_flash]
+auto_mode = []
+gaming_mode = []
+lowlatency_mode = []
+powersave_mode = []
 "#;
 
         let parsed_config = parse_config_content(config_str).expect("Failed to parse config");

rust/scx_loader/src/main.rs

@@ -39,6 +39,8 @@ enum SupportedSched {
     Rusty,
     #[serde(rename = "scx_lavd")]
     Lavd,
+    #[serde(rename = "scx_flash")]
+    Flash,
 }
 
 #[derive(Debug, PartialEq)]
@@ -114,7 +116,7 @@ impl ScxLoader {
     /// Get list of supported schedulers
     #[zbus(property)]
     async fn supported_schedulers(&self) -> Vec<&str> {
-        vec!["scx_bpfland", "scx_rusty", "scx_lavd"]
+        vec!["scx_bpfland", "scx_rusty", "scx_lavd", "scx_flash"]
     }
 
     async fn start_scheduler(
@@ -546,6 +548,7 @@ fn get_scx_from_str(scx_name: &str) -> zbus::fdo::Result<SupportedSched> {
         "scx_bpfland" => Ok(SupportedSched::Bpfland),
         "scx_rusty" => Ok(SupportedSched::Rusty),
         "scx_lavd" => Ok(SupportedSched::Lavd),
+        "scx_flash" => Ok(SupportedSched::Flash),
         _ => Err(zbus::fdo::Error::Failed(format!(
             "{scx_name} is not supported"
         ))),
@@ -558,5 +561,6 @@ fn get_name_from_scx(supported_sched: &SupportedSched) -> &'static str {
         SupportedSched::Bpfland => "scx_bpfland",
         SupportedSched::Rusty => "scx_rusty",
         SupportedSched::Lavd => "scx_lavd",
+        SupportedSched::Flash => "scx_flash",
     }
 }