On 18-Jun-18 8:53 PM, Dariusz Stojaczyk wrote:
Since secondary process' address space is highly dictated by the primary process' mappings, it doesn't make much sense to use base-virtaddr for secondary processes.This patch is intended to fix PCI resource mapping in secondary processes using the same base-virtaddr as their primary processes. PCI uses the end of the hugepage memory area to map all resources. [pci_find_max_end_va()] It works for primary processes, but can't be mapped 1:1 by secondary ones, as the same addresses are currently always occupied by shadow memseg lists, which were created with eal_get_virtual_area(NULL, ...). ``` PRIMARY PROCESS 0x6e00e00000 388K rw-s- fbarray_memseg-2048k-1-3 0x6e01000000 16777216K r---- [ anon ] 0x7201000000 16K rw-s- resource0 SECONDARY PROCESS 0x6e00e00000 388K rw-s- fbarray_memseg-2048k-1-3 0x6e01000000 16777216K r---- [ anon ] 0x7201000000 4K rw-s- fbarray_memseg-1048576k-0-0_203213 ``` Fixes: 524e43c2ad9a ("mem: prepare memseg lists for multiprocess sync") Cc: [email protected] Cc: [email protected] Signed-off-by: Dariusz Stojaczyk <[email protected]> ---
Acked-by: Anatoly Burakov <[email protected]> -- Thanks, Anatoly
