kernel-packages team mailing list archive

[Steve Langasek <steve.langasek@xxxxxxxxxxxxx>]

On Tue, Oct 15, 2013 at 08:19:53AM -0000, James Hunt wrote:
> Once again, the biggest offender by a huge margin is dbus:

> ==15329== 1,153,679,208 bytes in 12,025 blocks are still reachable in loss record 208 of 208
> ==15329==    at 0x402BB88: realloc (in /usr/lib/valgrind/vgpreload_memcheck-x86-linux.so)
> ==15329==    by 0x408E778: dbus_realloc (dbus-memory.c:678)
> ==15329==    by 0x408F08C: reallocate_for_length (dbus-string.c:349)
> ==15329==    by 0x408F12B: set_length (dbus-string.c:390)
> ==15329==    by 0x408F1A9: open_gap (dbus-string.c:411)
> ==15329==    by 0x408FA67: copy (dbus-string.c:1198)
> ==15329==    by 0x408FCCE: _dbus_string_copy_len (dbus-string.c:1368)
> ==15329==    by 0x408DCF8: marshal_len_followed_by_bytes (dbus-marshal-basic.c:726)
> ==15329==    by 0x408DD95: marshal_string (dbus-marshal-basic.c:758)
> ==15329==    by 0x408DF60: _dbus_marshal_write_basic (dbus-marshal-basic.c:840)
> ==15329==    by 0x4075CD7: _dbus_type_writer_write_basic_no_typecode (dbus-marshal-recursive.c:1601)
> ==15329==    by 0x40768BB: _dbus_type_writer_write_basic (dbus-marshal-recursive.c:2323)

Yet this backtrace is still deep in the dbus internals and shows us nothing
about who the actual caller is that's causing the leak.  Can you please run
this with --num-callers=20 so we can see why these strings are actually
being allocated?

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https://bugs.launchpad.net/bugs/1235649

Title:
  uevent spam causes libdbus client code in session upstart to consume
  massive amounts of memory on Ubuntu Touch

Status in Upstart:
  New
Status in “linux” package in Ubuntu:
  Invalid
Status in “systemd” package in Ubuntu:
  Invalid
Status in “unity” package in Ubuntu:
  New
Status in “upstart” package in Ubuntu:
  Fix Released
Status in “linux” source package in Saucy:
  Invalid
Status in “systemd” source package in Saucy:
  Invalid
Status in “unity” source package in Saucy:
  New
Status in “upstart” source package in Saucy:
  Fix Released

Bug description:
  using ubuntu touch image 82 i see the session init consume about 10MB per minute as long as the screen is on  with Mir.
  running the same session with surfaceflinger only consumes 1MB per minute.

  in both cases the system starts to swap heavily at some point, making
  the UI unresponsive.

  http://paste.ubuntu.com/6196223/ has the top output of a Mir session
  after 30min, the UI just got completely unresponsive when this
  snapshot was taken.

  http://paste.ubuntu.com/6196332/ is the top output of a surfaceflinger
  session where the screen was off for about 10min

  apparently the leak only occurs while the screen is on, it seems to be
  permanently there but in the case of surfaceflinger it hits less hard.

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