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init: Add warning in init first stage mount

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init need find required devices and it some times takes a long time due
to rogue drivers. Add a warning if the timing is longer than 50ms.

Bug: 80494921
Test: Reboot
Change-Id: I8f937d7ca7127dc89ed76bb6e5f1781459d5c94a
This commit is contained in:
Wei Wang 2018-06-08 00:34:44 -07:00
parent 7222199281
commit fdafb3d0ec
1 changed files with 14 additions and 0 deletions
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14
init/uevent_listener.cpp
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@ -23,7 +23,11 @@
#include <memory>
#include <android-base/chrono_utils.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/scopeguard.h>
#include <android-base/stringprintf.h>
#include <cutils/uevent.h>
namespace android {
@ -130,9 +134,19 @@ ListenerAction UeventListener::RegenerateUeventsForDir(DIR* d,
int fd = openat(dfd, "uevent", O_WRONLY);
if (fd >= 0) {
android::base::Timer t;
write(fd, "add\n", 4);
const std::string fd_path = android::base::StringPrintf("/proc/self/fd/%d", fd);
std::string uevent_file_path;
android::base::Readlink(fd_path, &uevent_file_path);
close(fd);
auto guard = android::base::make_scope_guard([&t, &uevent_file_path]() {
if (t.duration() > 50ms) {
LOG(WARNING) << "ReadUevent took " << t << " on '" << uevent_file_path << "'";
}
});
Uevent uevent;
while (ReadUevent(&uevent)) {
if (callback(uevent) == ListenerAction::kStop) return ListenerAction::kStop;