Try fixing the u00001 instability by retrying polls which fail with EINTR.
Try fixing the u00001 instability by retrying polls which fail
with EINTR.

I suspect the underlying issue is that SIGCHLD is being sent
to a random thread and that happens to be the s1 thread on some
platforms.

feld/Varnish-Cache,mrhmouse/Varnish-Cache,varnish/Varnish-Cache,ajasty-cavium/Varnish-Cache,varnish/Varnish-Cache,varnish/Varnish-Cache,feld/Varnish-Cache,franciscovg/Varnish-Cache,chrismoulton/Varnish-Cache,franciscovg/Varnish-Cache,ajasty-cavium/Varnish-Cache,mrhmouse/Varnish-Cache,mrhmouse/Varnish-Cache,varnish/Varnish-Cache,chrismoulton/Varnish-Cache,ajasty-cavium/Varnish-Cache,varnish/Varnish-Cache,franciscovg/Varnish-Cache,chrismoulton/Varnish-Cache,mrhmouse/Varnish-Cache,franciscovg/Varnish-Cache,chrismoulton/Varnish-Cache,chrismoulton/Varnish-Cache,feld/Varnish-Cache,zhoualbeart/Varnish-Cache,zhoualbeart/Varnish-Cache,zhoualbeart/Varnish-Cache,mrhmouse/Varnish-Cache,gquintard/Varnish-Cache,feld/Varnish-Cache,feld/Varnish-Cache,gquintard/Varnish-Cache,ajasty-cavium/Varnish-Cache,ajasty-cavium/Varnish-Cache,franciscovg/Varnish-Cache,zhoualbeart/Varnish-Cache,gquintard/Varnish-Cache,zhoualbeart/Varnish-Cache,gquintard/Varnish-Cache