721130 - Busywait talking to SSL server

Status: RESOLVED DUPLICATE of bug 710176

(Core :: Security: PSM, defect)

Description

[Steve Fink [:sfink] [:s:]]

Attachment: stack trace of recvfrom busywait

I have a thread that is spinning on recvfrom:

% strace -p 25284
recvfrom(60, 0x7f404ec343d8, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
recvfrom(66, 0x7f404a4f53d8, 5, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
...(repeated endlessly; strace -c says 2500 calls/second)...

Those file descriptors are both talking to pz-in-f84.1e100.net:443:

% lsof -p 25280 | egrep '6[06]u'
firefox 25280 sfink   60u  IPv4            1177022      0t0      TCP 10.0.0.14:41776->pz-in-f84.1e100.net:https (ESTABLISHED)
firefox 25280 sfink   66u  IPv4            1177200      0t0      TCP 10.0.0.14:41781->pz-in-f84.1e100.net:https (ESTABLISHED)

I've attached a stack from gstack -p 25284.

This thread is burning 100% of a CPU.