firefox-6.0_1 spinning on a cpu

[Andriy Gapon]

I observe the following problem - sometimes a firefox processes starts consuming a
lot of CPU for no apparent reason.
ktrace shows that it does the following:
  9332 179912 firefox-bin 0.000007 CALL  poll(0x7fffff5fabc0,0x3,0x3e7fc18)
  9332 179912 firefox-bin 0.000008 RET   poll 2
  9332 179912 firefox-bin 0.000007 CALL  gettimeofday(0x7fffff5fadf0,0)
  9332 179912 firefox-bin 0.000007 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000009 CALL  gettimeofday(0x7fffff5fadf0,0)
  9332 179912 firefox-bin 0.000018 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000009 CALL
getpeername(0x42,0x7fffff5faa90,0x7fffff5faa4c)
  9332 179912 firefox-bin 0.000008 RET   getpeername -1 errno 57 Socket is not
connected
  9332 179912 firefox-bin 0.000008 CALL
getpeername(0x43,0x7fffff5faa90,0x7fffff5faa4c)
  9332 179912 firefox-bin 0.000008 RET   getpeername -1 errno 57 Socket is not
connected
  9332 179912 firefox-bin 0.000007 CALL  gettimeofday(0x7fffff5fab60,0)
  9332 179912 firefox-bin 0.000008 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000018 CALL  poll(0x7fffff5fabc0,0x3,0x3e7fc18)
  9332 179912 firefox-bin 0.000009 RET   poll 2
  9332 179912 firefox-bin 0.000007 CALL  gettimeofday(0x7fffff5fadf0,0)
  9332 179912 firefox-bin 0.000008 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000009 CALL  gettimeofday(0x7fffff5fadf0,0)
  9332 179912 firefox-bin 0.000007 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000008 CALL
getpeername(0x42,0x7fffff5faa90,0x7fffff5faa4c)
  9332 179912 firefox-bin 0.000014 RET   getpeername -1 errno 57 Socket is not
connected
  9332 179912 firefox-bin 0.000008 CALL
getpeername(0x43,0x7fffff5faa90,0x7fffff5faa4c)
  9332 179912 firefox-bin 0.000007 RET   getpeername -1 errno 57 Socket is not
connected
  9332 179912 firefox-bin 0.000008 CALL  gettimeofday(0x7fffff5fab60,0)
  9332 179912 firefox-bin 0.000007 RET   gettimeofday 0
  9332 179912 firefox-bin 0.000007 CALL  poll(0x7fffff5fabc0,0x3,0x3e7fc18)

and so on.
The two sockets in question (66 and 67) appear as follows in sockstat output:
avg      firefox-bi 9332  66 tcp4   92.249.64.71:44862    63.245.217.114:443
avg      firefox-bi 9332  67 tcp4   92.249.64.71:34232    63.245.217.114:443
Where:
$ host 63.245.217.114
114.217.245.63.in-addr.arpa domain name pointer
addons-versioncheck.zlb.phx.mozilla.net.

So apparently this has something to do with automatic version check for addons.

I am not sure if this is a general "cross-platform" bug or if it is specific to
FreeBSD in some way.  E.g. maybe the error code is unexpected or what poll(2)
returns is different from e.g. Linux.

Maybe this is already fixed in 6.0.1?

Anyone gets the same?  Anybody has an idea how to fix?
Thank you!
-- 
Andriy Gapon