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SubjectRe: [PATCH net-next v1 02/13] net: wwan: tmi: Add buffer management
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On 22.11.2022 15:11, Yanchao Yang wrote:
> From: MediaTek Corporation <linuxwwan@mediatek.com>
>
> To malloc I/O memory as soon as possible, buffer management comes into being.
> It creates buffer pools that reserve some buffers through deferred works when
> the driver isn't busy.
>
> The buffer management provides unified memory allocation/de-allocation
> interfaces for other modules. It supports two buffer types of SKB and page.
> Two reload work queues with different priority values are provided to meet
> various requirements of the control plane and the data plane.
>
> When the reserved buffer count of the pool is less than a threshold (default
> is 2/3 of the pool size), the reload work will restart to allocate buffers
> from the OS until the buffer pool becomes full. When the buffer pool fills,
> the OS will recycle the buffer freed by the user.
>
> Signed-off-by: Mingliang Xu <mingliang.xu@mediatek.com>
> Signed-off-by: MediaTek Corporation <linuxwwan@mediatek.com>
> ---
> drivers/net/wwan/mediatek/Makefile | 3 +-
> drivers/net/wwan/mediatek/mtk_bm.c | 369 ++++++++++++++++++++++++++++
> drivers/net/wwan/mediatek/mtk_bm.h | 79 ++++++
> drivers/net/wwan/mediatek/mtk_dev.c | 11 +-
> drivers/net/wwan/mediatek/mtk_dev.h | 1 +
> 5 files changed, 461 insertions(+), 2 deletions(-)
> create mode 100644 drivers/net/wwan/mediatek/mtk_bm.c
> create mode 100644 drivers/net/wwan/mediatek/mtk_bm.h

Yanchao, can you share some numbers, how this custom pool is outperform
the regular kernel allocator?

--
Sergey

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