diff mbox

[dpdk-dev] memzone: document reserving zero-length memzones

Message ID c60cdb01eedd3f02922c776d22a9d28be28a6b9c.1525364731.git.anatoly.burakov@intel.com (mailing list archive)
State Accepted, archived
Delegated to: Thomas Monjalon
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Anatoly Burakov May 3, 2018, 4:25 p.m. UTC 
  Currently, reserving a memzone with length set to 0 will not trigger
any memory allocations, and memzone will instead be looking through
already allocated memory only. Document this limitation.

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 lib/librte_eal/common/include/rte_memzone.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Thomas Monjalon May 14, 2018, 12:01 a.m. UTC | #1 
03/05/2018 18:25, Anatoly Burakov:
> Currently, reserving a memzone with length set to 0 will not trigger
> any memory allocations, and memzone will instead be looking through
> already allocated memory only. Document this limitation.
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>

Applied, thanks
diff mbox

Patch

diff --git a/lib/librte_eal/common/include/rte_memzone.h b/lib/librte_eal/common/include/rte_memzone.h
index 0eeb94f..a4c9bd6 100644
--- a/lib/librte_eal/common/include/rte_memzone.h
+++ b/lib/librte_eal/common/include/rte_memzone.h
@@ -77,6 +77,10 @@  struct rte_memzone {
  * correctly filled memzone descriptor. If the allocation cannot be
  * done, return NULL.
  *
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ *   memzones from memory that is already available. It will not trigger any
+ *   new allocations.
+ *
  * @param name
  *   The name of the memzone. If it already exists, the function will
  *   fail and return NULL.
@@ -130,6 +134,10 @@  const struct rte_memzone *rte_memzone_reserve(const char *name,
  * descriptor. If the allocation cannot be done or if the alignment
  * is not a power of 2, returns NULL.
  *
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ *   memzones from memory that is already available. It will not trigger any
+ *   new allocations.
+ *
  * @param name
  *   The name of the memzone. If it already exists, the function will
  *   fail and return NULL.
@@ -188,6 +196,10 @@  const struct rte_memzone *rte_memzone_reserve_aligned(const char *name,
  * boundary. That implies that requested length should be less or equal
  * then boundary.
  *
+ * @note Reserving memzones with len set to 0 will only attempt to allocate
+ *   memzones from memory that is already available. It will not trigger any
+ *   new allocations.
+ *
  * @param name
  *   The name of the memzone. If it already exists, the function will
  *   fail and return NULL.