Re: [libvirt] [PATCH] util:qemu: fix IOThreadinfo always get failed when get running vm status

When we use iothreadinfo to get iothread information, we will get error like this: # virsh iothreadinfo rhel7.0 --live error: Unable to get domain IOThreads information error: Unable to encode message payload This is because virProcessGetAffinity() return a bitmap which map_len is too big to send via rpc: (gdb) p *map $7 = {max_bit = 262144, map_len = 4096, map = 0x7f9b6c2c0a20} To fix this issue add a new parameter &maxcpu to virProcessGetAffinity() to let callers specify the maxcpu (also in most machine, no need loop 262144 times to check if cpu is set), if set &maxcpu to zero, virProcessGetAffinity() will use default value (262144 or 1024) to create bitmap. This issue was introduced in commit 825df8c. Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 4 ++-- src/util/virprocess.c | 7 ++++--- src/util/virprocess.h | 2 +- 3 files changed, 7 insertions(+), 6 deletions(-)