On Mon, Jun 4, 2012 at 11:48 PM, Cyrill Gorcunov <gorcunov@xxxxxxxxxx> wrote:
> On Mon, Jun 04, 2012 at 11:40:53PM +0800, Asias He wrote:
>>
>> +static void *virtio_blk_thread(void *dev)
>> +{
>> + struct blk_dev *bdev = dev;
>> + u64 data;
>> +
>> + while (1) {
>> + read(bdev->io_efd, &data, sizeof(u64));
>> + virtio_blk_do_io(bdev->kvm, &bdev->vqs[0], bdev);
>> + }
>> +
>> + pthread_exit(NULL);
>> + return NULL;
>> +}
>
> I must admit I don't understand this code ;) The data get read into
> stack variable forever?
The data we read itself is not interesting at all. virtio_blk_thread()
sleeps on the eventfd bdev->io_efd until notify_vq() writes something
to wake it up.
--
Asias He
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