diff options
| author | Sheng Yang <sheng@linux.intel.com> | 2009-04-29 22:58:42 -0400 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-09-10 01:32:43 -0400 |
| commit | 968a6347936f9421b5bc5358b579e811c52726bc (patch) | |
| tree | 0067fd4925db6763c701d9534e54b4b61be1712d /ipc/compat_mq.c | |
| parent | 017cb99e875f2d8ff375cbb576c794b081cd0bd5 (diff) | |
KVM: No disable_irq for MSI/MSI-X interrupt on device assignment
Disable interrupt at interrupt handler and enable it when guest ack is for
the level triggered interrupt, to prevent reinjected interrupt. MSI/MSI-X don't
need it.
One possible problem is multiply same vector interrupt injected between irq
handler and scheduled work handler would be merged as one for MSI/MSI-X.
But AFAIK, the drivers handle it well.
The patch fixed the oplin card performance issue(MSI-X performance is half of
MSI/INTx).
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'ipc/compat_mq.c')
0 files changed, 0 insertions, 0 deletions