DragonFly BSD
DragonFly bugs List (threaded) for 2005-03
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Re: Firefox hangs in state 'kqread'

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 16 Mar 2005 10:17:52 -0800 (PST)

:The problem is very easy to reproduce by loading a big number of different 
:sites in different tabs at the same time. I loaded every result returned 
:by Google about "dragonfly bsd", and the browser froze just a few seconds 
:after that.
     It looks like a DNS issue.  Do it again and see if just before the kq
     hang it also tries to send a DNS lookup request for e.g.

     Doubleclick has always been problematic for me.  It got so bad that I
     create a dummy master zone record for it in my named setup.

     That said, there *IS* a network issue somewhere in the networking stack
     which I can reproduce, and it could have something to do with the 
     problem too.  I intend to find and fix it today.

					Matthew Dillon 

:Here is the trace of the process before and after the hang:
:     958 opera    CALL  socket(0x2,0x2,0)
:     958 opera    RET   socket 100/0x64
:     958 opera    CALL  fcntl(0x64,0x3,0)
:     958 opera    RET   fcntl 2
:     958 opera    CALL  fcntl(0x64,0x4,0x6)
:     958 opera    RET   fcntl 0
:     958 opera    CALL  connect(0x64,0x28e8d8f0,0x10)
:     958 opera    RET   connect 0
:     958 opera    CALL  sendto(0x64,0x988c000,0x24,0,0,0)
:     958 opera    GIO   fd 100 wrote 36 bytes
:         "\M^Y8\^A\0\0\^A\0\0\0\0\0\0\^Bad\vdoubleclick\^Cnet\0\0\^\\0\^A"
:     958 opera    RET   sendto 36/0x24
:     958 opera    CALL  gettimeofday(0xbfadc688,0)
:     958 opera    RET   gettimeofday 0
:     958 opera    CALL  kevent(0x63,0xbfadc6ac,0x1,0xbfadc6ac,0x1,0xbfadc690)
:Laurent Sartran

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