Hi Olivier, On Sunday 01 October 2017 02:59 PM, Santosh Shukla wrote: > Some mempool hw like octeontx/fpa block, demands block size > (/total_elem_sz) aligned object start address. > > Introducing an MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS flag. > If this flag is set: > - Align object start address(vaddr) to a multiple of total_elt_sz. > - Allocate one additional object. Additional object is needed to make > sure that requested 'n' object gets correctly populated. > > Example: > - Let's say that we get 'x' size of memory chunk from memzone. > - And application has requested 'n' object from mempool. > - Ideally, we start using objects at start address 0 to...(x-block_sz) > for n obj. > - Not necessarily first object address i.e. 0 is aligned to block_sz. > - So we derive 'offset' value for block_sz alignment purpose i.e..'off'. > - That 'off' makes sure that start address of object is blk_sz aligned. > - Calculating 'off' may end up sacrificing first block_sz area of > memzone area x. So total number of the object which can fit in the > pool area is n-1, Which is incorrect behavior. > > Therefore we request one additional object (/block_sz area) from memzone > when MEMPOOL_F_CAPA_BLK_ALIGNED_OBJECTS flag is set. > > Signed-off-by: Santosh Shukla <santosh.shu...@caviumnetworks.com> > Signed-off-by: Jerin Jacob <jerin.ja...@caviumnetworks.com> > Tested-by: Hemant Agrawal <hemant.agra...@nxp.com> > ---
early ping, since we needed this -rc1! Thanks.
