diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2013-06-04 14:52:35 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2013-07-03 10:38:20 +0200 |
| commit | 40509f7f52672fe41c2cce895e187352fc09f53a (patch) | |
| tree | e031437f9c3136e81c1656f613162aecc66e9c2d /nbd.c | |
| parent | 0fbc20740342713f282b118b4a446c4c43df3f4a (diff) | |
kvm: skip system call when msi route is unchanged
Some guests do a large number of mask/unmask
calls which currently trigger expensive route update
system calls.
Detect that route in unchanged and skip the system call.
Reported-by: "Zhanghaoyu (A)" <haoyu.zhang@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'nbd.c')
0 files changed, 0 insertions, 0 deletions