[dpdk-dev] [PATCH 2/4] mem: add API to obstain memory-backed file info

Pavel Fedin p.fedin at samsung.com
Tue Jan 12 14:57:19 CET 2016


> I might be missing something obvious here but, aside from having memory
> SHARED which most DPDK apps using hugepages will have anyway, what is
> the backward compatibility issues that you see here?

 Heh, sorry once again for confusing. Indeed, with hugepages we always get MAP_SHARED. I missed that. So, we indeed need
--shared-mem only in addition to --no-huge.

 Backwards compatibility issue is stated in the description of PATCH 1/4:
--- cut ---
b. possible ABI break, originally, --no-huge uses anonymous memory
instead of file-backed way to create memory.
--- cut ---
 The patch unconditionally changes that to SHARED. That's all.

Kind regards,
Pavel Fedin
Senior Engineer
Samsung Electronics Research center Russia

More information about the dev mailing list