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memzone: clarify support for zero-length memzones

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Currently, memzone allocation with length set to 0 that are also
IOVA-contiguous is not supported. Document this limitation.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
This commit is contained in:
Anatoly Burakov 2018-05-25 14:39:45 +01:00 committed by Thomas Monjalon
parent 0d0ad70175
commit cc789005fc
1 changed files with 9 additions and 0 deletions
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9
lib/librte_eal/common/include/rte_memzone.h
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@ -81,6 +81,9 @@ struct rte_memzone {
* memzones from memory that is already available. It will not trigger any
* new allocations.
*
* @note Reserving IOVA-contiguous memzones with len set to 0 is not currently
* supported.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
@ -138,6 +141,9 @@ const struct rte_memzone *rte_memzone_reserve(const char *name,
* memzones from memory that is already available. It will not trigger any
* new allocations.
*
* @note Reserving IOVA-contiguous memzones with len set to 0 is not currently
* supported.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.
@ -200,6 +206,9 @@ const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
* memzones from memory that is already available. It will not trigger any
* new allocations.
*
* @note Reserving IOVA-contiguous memzones with len set to 0 is not currently
* supported.
*
* @param name
* The name of the memzone. If it already exists, the function will
* fail and return NULL.