search for: get_unsued_pages

...u can efficiently fill the bitmaps at a given order for all zones, then move to a new bitmap. But, it would be interesting to document this. > + pos = 0; > + ret = get_unused_pages(vb->resp_data, > + vb->resp_buf_size / sizeof(unsigned long), > + order, &pos); FWIW, get_unsued_pages() is a pretty bad name. "get" usually implies bumping reference counts or consuming something. You're just "recording" or "marking" them. > + if (ret == -ENOSPC) { > + void *new_resp_data; > + > + new_resp_data = kmalloc(2 * vb->resp_buf_size...

...u can efficiently fill the bitmaps at a given order for all zones, then move to a new bitmap. But, it would be interesting to document this. > + pos = 0; > + ret = get_unused_pages(vb->resp_data, > + vb->resp_buf_size / sizeof(unsigned long), > + order, &pos); FWIW, get_unsued_pages() is a pretty bad name. "get" usually implies bumping reference counts or consuming something. You're just "recording" or "marking" them. > + if (ret == -ENOSPC) { > + void *new_resp_data; > + > + new_resp_data = kmalloc(2 * vb->resp_buf_size...

...the order is somewhat strange, but it's helpful to keep the API simple. Do you think it's acceptable? > > + pos = 0; > > + ret = get_unused_pages(vb->resp_data, > > + vb->resp_buf_size / sizeof(unsigned long), > > + order, &pos); > > FWIW, get_unsued_pages() is a pretty bad name. "get" usually implies > bumping reference counts or consuming something. You're just "recording" > or "marking" them. > Will change to mark_unused_pages(). > > + if (ret == -ENOSPC) { > > + void *new_resp_data; &...

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.