Disable VFS cache for writable handles

1 files changed, 6 insertions, 2 deletions

diff --git a/src/src/vfs/mo2filesystem.cpp b/src/src/vfs/mo2filesystem.cpp
index 5176614..d23c2e6 100644
--- a/src/src/vfs/mo2filesystem.cpp
+++ b/src/src/vfs/mo2filesystem.cpp
@@ -1930,7 +1930,11 @@ void mo2_open(fuse_req_t req, fuse_ino_t ino, struct fuse_file_info* fi)
   }
 
   fi->fh = fh;
-  fi->keep_cache = 1;
+  // Read-only mod/game files are immutable during a session, so keeping the
+  // page cache is safe and fast. Writable handles can remap the same VFS inode
+  // from a mod file to a staged copy, and repeated INI API calls need to read
+  // the just-written staged content rather than stale cached pages.
+  fi->keep_cache = writable ? 0 : 1;
 
   fuse_reply_open(req, fi);
 }
@@ -2215,7 +2219,7 @@ void mo2_create(fuse_req_t req, fuse_ino_t parent, const char* name, mode_t mode
   }
 
   fi->fh         = fh;
-  fi->keep_cache = 1;
+  fi->keep_cache = 0;
 
   struct fuse_entry_param e;
   std::memset(&e, 0, sizeof(e));