I'm running oneiric - ubuntu 11.10. dbus-monitor is slient. I'm pretty
sure for me it's something to do with thunderbird since it started
happening on cue if open/close/delete an email. Running strace -p on
thunderbird, I see

stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=3543, ...}) = 0

about 45000 times and then an increasing number of sendmsg calls that
all look similar to

sendmsg(38, {msg_name(0)=NULL,
msg_iov(2)=[{"l\4\1\1\24\1\0\0002\304\23\0x\0\0\0\1\1o\0\25\0\0\0/org/a11"...,
136}, {"\5\0\0\0:1.48\0\0\0!\0\0\0/org/a11y/atspi/"..., 276}],
msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 412

That goes on until line 356014 and then some polls, reads, a ton of

madvise(0x7fa56ccbc000, 4096, MADV_DONTNEED) = 0

and I had killed strace at that point while thunderbird and dbus were
still going nuts.  Perhaps this should be filed with thunderbird.

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https://bugs.launchpad.net/bugs/680444

Title:
  dbus-daemon eats 100% cpu and is not responsive

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