netdev - Re: [PATCH net-next] net/rds: Use DMA memory pool allocation for rds

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Message-ID: <bb76878a-caae-a06f-c044-0aef22aebc1d@oracle.com>
Date:   Mon, 30 Sep 2019 11:34:49 -0700
From:   santosh.shilimkar@...cle.com
To:     Ka-Cheong Poon <ka-cheong.poon@...cle.com>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, rds-devel@....oracle.com
Subject: Re: [PATCH net-next] net/rds: Use DMA memory pool allocation for
 rds_header

On 9/30/19 2:08 AM, Ka-Cheong Poon wrote:
> Currently, RDS calls ib_dma_alloc_coherent() to allocate a large piece
> of contiguous DMA coherent memory to store struct rds_header for
> sending/receiving packets.  The memory allocated is then partitioned
> into struct rds_header.  This is not necessary and can be costly at
> times when memory is fragmented.  Instead, RDS should use the DMA
> memory pool interface to handle this.
> 
> Suggested-by: Håkon Bugge <haakon.bugge@...cle.com>
> Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@...cle.com>
> ---
Thanks for getting this out on the list Ka-Cheong.

Acked-by: Santosh Shilimkar <santosh.shilimkar@...cle.com>