hello:
I found os_mem_prealloc prealloc memory by multiple threads ,and max
threads number is 16,I want do know the reason,why do not use smp_cpus?
(in fact,I also found smp_cpus can not reduce more start time,I just want
to know the reasion)
thanks!
hello ,when I read virtio source code ,I was confused about when back-end
notify front-end。
In function virtio_should_notify，if vq->signalled_used_valid == false
or vring_need_event(vring_get_used_event(vq), new, old) is true，notiry will
occur。but I can not understand when vq->signalled_used_valid
. David Alan Gilbert :
> * jack.chen (zhun...@gmail.com) wrote:
>> thanks,but I really can not understand how the fd works,can someone
>> explain it or give me some reference material??
>
> Probably the man page for the mmap system call, or an introduction to
> linux/unix
thanks,but I really can not understand how the fd works,can someone
explain it or give me some reference material??
2018-02-01 1:31 GMT+08:00 Dr. David Alan Gilbert :
> * jack.chen (zhun...@gmail.com) wrote:
>> hello,I am confused when I read vhost-user source code in qemu.I know
>
hello,I am confused when I read vhost-user source code in qemu.I know
vhost-user app shared memory with qemu by mmap,but why it can use fd which
is belong to qemu?
relative code:
qemu code in function vhost_user_set_mem_table
fd = memory_region_get_fd(mr);
if (fd > 0) {
msg.pay
Hello ,in kvm_set_phys_mem,I am confused about the following codes:
delta = TARGET_PAGE_ALIGN(size) - size;
if (delta > size) {
return;
}
start_addr += delta;
size -= delta;
size &= TARGET_PAGE_MASK;
why start_addr need to add delta,and why size sub delta,in my own
opin
-18 10:25 GMT+08:00 jack.chen :
> Thanks very much!!
>
> 2017-04-17 19:19 GMT+08:00 李强 :
>>
>>
>>> -Original Message-
>>> From: Qemu-devel
>>> [mailto:qemu-devel-bounces+liqiang6-s=360...@nongnu.org] On Behalf Of
>>> jack.chen
>>
Thanks very much!!
2017-04-17 19:19 GMT+08:00 李强 :
>
>
>> -Original Message-
>> From: Qemu-devel
>> [mailto:qemu-devel-bounces+liqiang6-s=360...@nongnu.org] On Behalf Of
>> jack.chen
>> Sent: Monday, April 17, 2017 6:56 PM
>> To: Peter Xu
>
for
each address_space,so the listener->region_add was executed then.I do
not know what mistake I have made,can you explain it to me ?? thank
you very much!
2017-04-17 18:26 GMT+08:00 Peter Xu :
> On Mon, Apr 17, 2017 at 06:09:11PM +0800, jack.chen wrote:
>> hello,I have some questions
hello,I have some questions about memory allocation in qemu for
virtual machine.I found when configure_accelerator function was called
,memory slots were registered to KVM,but at that time address_space
have not been initialized and ram have not been allocated,it is really
confused me,Thanks a lot
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