56259f7fc0
Currently, if we map a memory area A, then map a separate memory area B that by coincidence happens to be adjacent to A, current implementation will merge these two segments into one, and if partial unmapping is not supported, these segments will then be only allowed to be unmapped in one go. In other words, given segments A and B that are adjacent, it is currently not possible to map A, then map B, then unmap A. Fix this by adding a notion of "chunk size", which will allow subdividing segments into equally sized segments whenever we are dealing with an IOMMU that does not support partial unmapping. With this change, we will still be able to merge adjacent segments, but only if they are of the same size. If we keep with our above example, adjacent segments A and B will be stored as separate segments if they are of different sizes. Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com> Signed-off-by: Xuan Ding <xuan.ding@intel.com> Tested-by: Yvonne Yang <yvonnex.yang@intel.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD-3-Clause license for the core libraries and drivers. The kernel components are GPL-2.0 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org