mempool name size assumes ring driver

http://bugs.dpdk.org/show_bug.cgi?id=1980

            Bug ID: 1980
           Summary: mempool name size assumes ring driver
           Product: DPDK
           Version: 26.07
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

When creating a mempool, the length of its name is checked. RTE_MEMPOOL_NAMESIZE defines the max allowed length, and is derived from the names of the memzones created for the mempool.
The mempool itself creates a memzone named "MP_name".
When using the Ring driver, the driver creates a memzone named "RG_MP_name". This is what RTE_MEMPOOL_NAMESIZE is based on:
Max memzone name - strlen("RG_") - strlen("MP_").

Now, when using the Stack driver, the driver creates a memzone named "STK_MP_name".
In this case, the RTE_MEMPOOL_NAMESIZE should be one byte less. With a long name, creating the mempool will succeed, but populating it will fail when the mempool driver tries to allocate the memzone for the mempool entries.

Reducing RTE_MEMPOOL_NAMESIZE (by one) to consider the memzone name created by the Stack driver would be an API change, and would not consider other drivers possibly using even longer memzone names.

You are receiving this mail because:
You are the assignee for the bug.