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author | Laszlo Ersek <lersek@redhat.com> | 2013-07-16 20:19:41 +0200 |
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committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-07-18 11:22:57 -0500 |
commit | 293d2a0014a0e849477413f55aaa05f2743b2e04 (patch) | |
tree | fe9d005b60aa177949eeb1e2756fe2bd5d1fab2c /tests/fw_cfg-test.c | |
parent | ac8c26f633b01bb32cdf347f9dbd5a80c6712925 (diff) |
monitor: maintain at most one G_IO_OUT watch
When monitor_flush() is invoked repeatedly outside the monitor_unblocked()
callback, for example from tlb_info() -> ... -> print_pte(), several
watches may be added for the same event.
This is no problem per se because the extra monitor_unblocked() callbacks
are harmless if mon->outbuf is empty, the watches will be removed
gradually. However a big number of watches can grow "gpollfds" without
limit in glib_pollfds_fill(), triggering a -1/EINVAL condition in
g_poll().
Keep at most one such watch, by following the pattern observable in eg.
commits c874ea97 and c3d6b96e. The change has no effect when
monitor_unblocked() calls monitor_flush() (when the watch can either be
removed or renewed 1-for-1), but non-callback contexts won't create an
additional watch when the monitor already has one.
Related RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=970047
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1373998781-29561-3-git-send-email-lersek@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'tests/fw_cfg-test.c')
0 files changed, 0 insertions, 0 deletions