kernel-packages team mailing list archive

[Ricardo Salveti <rsalveti@xxxxxxxxxxxx>]

>From camera-app:
Max nice priority         0                    0                    
Max realtime priority     0                    0                    

We're not setting the nice value as done by android since we flipped the
container, and afaik we still don't have a policy that describes the
nice priority for specific processes (system, phablet, etc).

The binder message itself is harmless, and we're ignoring it at syslog
already, just annoying the kernel log buffer ring.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-maguro in Ubuntu.
https://bugs.launchpad.net/bugs/1202887

Title:
  'binder: RLIMIT_NICE not set' when using binder from the ubuntu side

Status in Touch Preview Images:
  New
Status in “linux-grouper” package in Ubuntu:
  New
Status in “linux-maguro” package in Ubuntu:
  New
Status in “linux-mako” package in Ubuntu:
  New
Status in “linux-manta” package in Ubuntu:
  New

Bug description:
  http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-
  saucy.git;a=blob;f=drivers/staging/android/binder.c;hb=refs/heads/mako#l516

  """
  static void binder_set_nice(long nice)
  {
  	long min_nice;
  	if (can_nice(current, nice)) {
  		set_user_nice(current, nice);
  		return;
  	}
  	min_nice = 20 - current->signal->rlim[RLIMIT_NICE].rlim_cur;
  	binder_debug(BINDER_DEBUG_PRIORITY_CAP,
  		     "binder: %d: nice value %ld not allowed use "
  		     "%ld instead\n", current->pid, nice, min_nice);
  	set_user_nice(current, min_nice);
  	if (min_nice < 20)
  		return;
  	binder_user_error("binder: %d RLIMIT_NICE not set\n", current->pid);
  }
  """

  That happens because binder expects it to be able to change the nice
  value for the specific process, and fails when the process is started
  by Ubuntu, which has a default nice value of 0 (rlimit nice is set to
  40 40 by default in android, via android's init).

To manage notifications about this bug go to:
https://bugs.launchpad.net/touch-preview-images/+bug/1202887/+subscriptions