> -----Original Message-----
> From: Jiawei Wang <[email protected]>
> Sent: Wednesday, October 28, 2020 15:14
> To: Slava Ovsiienko <[email protected]>; Matan Azrad
> <[email protected]>; Shahaf Shuler <[email protected]>; Ori Kam
> <[email protected]>
> Cc: [email protected]; Raslan Darawsheh <[email protected]>; [email protected]
> Subject: [PATCH] common/mlx5: free MR resource while device DMA unmap
>
> mlx5 PMD created the MR (Memory Region) resource on the mlx5_dma_map
> call to make the memory available for DMA operations. On the
> mlx5_dma_unmap call the MR resource was not freed but inserted to MR Free
> list for further garbage collection.
> Actual MR resource destroying happened on device stop call. That caused the
> runtime out of memory in case of application performed multiple DMA
> map/unmap calls.
>
> The fix immediately frees the MR resource on mlx5_dma_unmap call not
> engaging the list. The export for mlx5_mr_free function from common PMD
> part is added as well.
>
> Redmine: 2330226
> Fixes: 989e999d9305 ("net/mlx5: support PCI device DMA map and unmap")
> Cc: [email protected]
>
> Signed-off-by: Jiawei Wang <[email protected]>
Acked-by: Viacheslav Ovsiienko <[email protected]>
