https://bugs.dpdk.org/show_bug.cgi?id=413
Bug ID: 413
Summary: rte_ring: capacity was set uncorrectly
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: core
Assignee: dev@dpdk.org
Reporter: 781345...@qq.com
Target Milestone: ---
In function `rte_ring_init()` in `lib/librte_ring/rte_ring.c`, `capacity` was
set to `mask` when count was power of 2, while `mask` was set to `count - 1`.
But when specified with flag `RING_F_EXACT_SZ`, `capacity` was set to `count`.
I think `capacity` should be set to `count` anyway. It's illogical when you
create a ring of count 4096 but you can only use 4095 of it. And when you
create a ring of count 4095, you can use 4095 of it. Their logic should be
identical.
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