fix(ext/node): fix os.freemem (#21347)

1 files changed, 12 insertions, 0 deletions

diff --git a/runtime/ops/os/sys_info.rs b/runtime/ops/os/sys_info.rs
index d8175f31b..b3d2cd743 100644
--- a/runtime/ops/os/sys_info.rs
+++ b/runtime/ops/os/sys_info.rs
@@ -211,8 +211,20 @@ pub fn mem_info() -> Option<MemInfo> {
       mem_info.swap_free = info.freeswap * mem_unit;
       mem_info.total = info.totalram * mem_unit;
       mem_info.free = info.freeram * mem_unit;
+      mem_info.available = mem_info.free;
       mem_info.buffers = info.bufferram * mem_unit;
     }
+
+    // Gets the available memory from /proc/meminfo in linux for compatibility
+    #[allow(clippy::disallowed_methods)]
+    if let Ok(meminfo) = std::fs::read_to_string("/proc/meminfo") {
+      let line = meminfo.lines().find(|l| l.starts_with("MemAvailable:"));
+      if let Some(line) = line {
+        let mem = line.split_whitespace().nth(1);
+        let mem = mem.and_then(|v| v.parse::<u64>().ok());
+        mem_info.available = mem.unwrap_or(0);
+      }
+    }
   }
   #[cfg(target_vendor = "apple")]
   {