Comment 5 for bug 1085342

Since commit c5a0802a682dba23f92d47f0f99775aebfbe2539 (Handle EAGAIN from FUTEX_WAIT_REQUEUE_PI), pulseaudio apps often hang.

Example backtrace from gnome-shell and libcanberra:

Thread 1 (Thread 0x7f975cfe8900 (LWP 2367)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:144
#1 0x00007f97558a4aa0 in pa_threaded_mainloop_wait (m=0x21bdf00) at pulse/thread-mainloop.c:206
#2 0x00007f97460aaa0b in pulse_driver_play (c=0x21b5280, id=<optimized
out>, proplist=0x704c9c0, cb=<optimized out>, userdata=<optimized
out>) at pulse.c:1085
#3 0x00007f975955624e in ca_context_play_full (c=c@entry=0x21b5280,
id=id@entry=1, p=0x704c9c0, cb=cb@entry=0x0,
userdata=userdata@entry=0x0) at common.c:522
#4 0x00007f97595565cf in ca_context_play (c=0x21b5280, id=1) at common.c:462
...