Thank you Ferruh for taking care of igb_uio. 2016-07-01 12:35, Ferruh Yigit: > With kernels enabled CONFIG_IO_STRICT_DEVMEM option mmap the iomem area > to userspace fails:
Maybe some words are missing. Please check punctuation of the whole commit message to make it easier to understand. > EAL: pci_map_resource(): > cannot mmap(39, 0x7f1c51800000, 0x100000, 0x0): > Invalid argument (0xffffffffffffffff) > > As a workaround igb_uio can stop reserving PCI memory resources, from > kernel point of view io-memory region looks like idle and mmap works > again. > > With this update device io-memory range is not protected against any > other kernel driver claim ownership on those resources, which shouldn't > be a problem for dpdk usage module. Why it should not be a problem? Please could you give an example of what could happen? This patch fixes a problem with recent kernels (not mentioned above) which offer the uio_pci_generic alternative. That's why I think we should fix it only if there is absolutely no regression for older kernels.
