mirror of https://gitee.com/openkylin/linux.git
532a6086e3
Both v and vb->num_pages are u32 and unsigned int respectively. If v is less than vb->num_pages (and it is, when deflating the balloon), the result is a very large 32-bit number. Since we're returning a s64, instead of getting the same negative number we desire, we get a very large positive number. This handles the case where v < vb->num_pages and ensures we get a small, negative, s64 as the result. Rusty: please push this for 2.6.27-rc4. It's probably appropriate for the stable tree too as it will cause an unexpected OOM when ballooning. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (simplified) |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| config.c | ||
| virtio.c | ||
| virtio_balloon.c | ||
| virtio_pci.c | ||
| virtio_ring.c | ||