Index: base/threading/platform_thread_linux.cc |
diff --git a/base/threading/platform_thread_linux.cc b/base/threading/platform_thread_linux.cc |
index 636e13331c4e245a733ef313fc2b749282aad39d..ec4c8916eb531682f0f5df1db97aaec8204f832c 100644 |
--- a/base/threading/platform_thread_linux.cc |
+++ b/base/threading/platform_thread_linux.cc |
@@ -82,13 +82,13 @@ void PlatformThread::SetThreadPriority(PlatformThreadHandle handle, |
} |
} |
- // setpriority(2) will set a thread's priority if it is passed a tid as |
- // the 'process identifier', not affecting the rest of the threads in the |
- // process. Setting this priority will only succeed if the user has been |
- // granted permission to adjust nice values on the system. |
+ // setpriority(2) should change the whole thread group's (i.e. process) |
+ // priority. However, on Linux it will only change the current thread. See |
+ // the BUGs section in |
+ // http://man7.org/linux/man-pages/man2/getpriority.2.html. |
DCHECK_NE(handle.id_, kInvalidThreadId); |
const int kNiceSetting = ThreadNiceValue(priority); |
- if (setpriority(PRIO_PROCESS, handle.id_, kNiceSetting)) { |
+ if (setpriority(PRIO_PROCESS, 0, kNiceSetting)) { |
DVPLOG(1) << "Failed to set nice value of thread (" |
<< handle.id_ << ") to " << kNiceSetting; |
} |