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| author | Paolo Bonzini | 2018-09-12 19:10:38 +0200 |
|---|---|---|
| committer | Fam Zheng | 2018-09-26 04:46:21 +0200 |
| commit | d7be5dd19c0df7f76e1b42f0c2cbbabefa1974cb (patch) | |
| tree | be99efc03f1c05806d4e180b2f4feb1166dfa975 /include/exec/exec-all.h | |
| parent | Merge remote-tracking branch 'remotes/xanclic/tags/pull-block-2018-09-25' int... (diff) | |
| download | qemu-d7be5dd19c0df7f76e1b42f0c2cbbabefa1974cb.tar.gz qemu-d7be5dd19c0df7f76e1b42f0c2cbbabefa1974cb.tar.xz qemu-d7be5dd19c0df7f76e1b42f0c2cbbabefa1974cb.zip | |
aio-posix: fix concurrent access to poll_disable_cnt
It is valid for an aio_set_fd_handler to happen concurrently with
aio_poll. In that case, poll_disable_cnt can change under the heels
of aio_poll, and the assertion on poll_disable_cnt can fail in
run_poll_handlers.
Therefore, this patch simply checks the counter on every polling
iteration. There are no particular needs for ordering, since the
polling loop is terminated anyway by aio_notify at the end of
aio_set_fd_handler.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20180912171040.1732-2-pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'include/exec/exec-all.h')
0 files changed, 0 insertions, 0 deletions