Load kernel modules in parallel
First, we load independent module in parallel, then we singly load
modules which have soft-dependencies. then remove them from dependency
list of other modules. Repeat these steps until all modules are loaded.
Bug: 180676019
Test: boot successfully, and save more than 400 ms on Pixel 6 Pro.
Signed-off-by: chungkai <chungkai@google.com>
Change-Id: Ib844cfee72d4049bd951528692c818b4fa6c8e8f
diff --git a/libmodprobe/libmodprobe_ext.cpp b/libmodprobe/libmodprobe_ext.cpp
index fb1f5e7..94a1dc4 100644
--- a/libmodprobe/libmodprobe_ext.cpp
+++ b/libmodprobe/libmodprobe_ext.cpp
@@ -54,6 +54,8 @@
if (ret != 0) {
if (errno == EEXIST) {
// Module already loaded
+ std::lock_guard guard(module_loaded_lock_);
+ module_loaded_paths_.emplace(path_name);
module_loaded_.emplace(canonical_name);
return true;
}
@@ -62,6 +64,8 @@
}
LOG(INFO) << "Loaded kernel module " << path_name;
+ std::lock_guard guard(module_loaded_lock_);
+ module_loaded_paths_.emplace(path_name);
module_loaded_.emplace(canonical_name);
module_count_++;
return true;
@@ -74,6 +78,7 @@
PLOG(ERROR) << "Failed to remove module '" << module_name << "'";
return false;
}
+ std::lock_guard guard(module_loaded_lock_);
module_loaded_.erase(canonical_name);
return true;
}