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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-11-14 12:36:57 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-11-27 15:06:14 +0100 |
| commit | a8efa60633575a2ee4dbf807a71cb44d44b0e0f8 (patch) | |
| tree | aa3206f7576f8a2ffd25431bdbf92ee70b65b788 /hw | |
| parent | d98f26073bebddcd3da0ba1b86c3a34e840c0fb8 (diff) | |
| download | qemu-a8efa60633575a2ee4dbf807a71cb44d44b0e0f8.zip qemu-a8efa60633575a2ee4dbf807a71cb44d44b0e0f8.tar.gz qemu-a8efa60633575a2ee4dbf807a71cb44d44b0e0f8.tar.bz2 | |
cpus: run work items for all vCPUs if single-threaded
This avoids the following I/O thread deadlock:
1) the I/O thread calls run_on_cpu for CPU 3 from a timer. single_tcg_halt_cond
is signaled
2) CPU 1 is running and exits. It finds no work item and enters CPU 2
3) because the I/O thread is stuck in run_on_cpu, the round-robin kick
timer never triggers, and CPU 3 never runs the work item
4) run_on_cpu never completes
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw')
0 files changed, 0 insertions, 0 deletions