From: Stanislaw Gruszka
> Sent: 30 July 2019 10:36
...
> > + len = pkt_stat.pkt_len + pkt_offset;
> > + skb = dev_alloc_skb(len);
> > + if (WARN_ONCE(!skb, "rx routine starvation\n"))
> > goto next_rp;
> >
> > /* put the DMA data
On Thu, Jul 25, 2019 at 04:09:26PM +0800, Jian-Hong Pan wrote:
> Each skb as the element in RX ring was expected with sized buffer 8216
> (RTK_PCI_RX_BUF_SIZE) bytes. However, the skb buffer's true size is
> 16640 bytes for alignment after allocated, x86_64 for example. And, the
rtw88 advertise
> > > > While allocating all 512 buffers in one block (just over 4MB)
> > > > is probably not a good idea, you may need to allocated (and dma map)
> > > > then in groups.
> > >
> > > Thanks for reviewing. But got questions here to double confirm the
> idea.
> > > According to original code, it
David Laight 於 2019年7月26日 週五 下午5:23寫道：
>
> From: Jian-Hong Pan
> > Sent: 26 July 2019 07:18
> ...
> > > While allocating all 512 buffers in one block (just over 4MB)
> > > is probably not a good idea, you may need to allocated (and dma map)
> > > then in groups.
> >
> > Thanks for reviewing. But
From: Jian-Hong Pan
> Sent: 26 July 2019 07:18
...
> > While allocating all 512 buffers in one block (just over 4MB)
> > is probably not a good idea, you may need to allocated (and dma map)
> > then in groups.
>
> Thanks for reviewing. But got questions here to double confirm the idea.
>
David Laight 於 2019年7月25日 週四 下午5:21寫道：
>
> From: Jian-Hong Pan
> > Sent: 25 July 2019 09:09
> > Each skb as the element in RX ring was expected with sized buffer 8216
> > (RTK_PCI_RX_BUF_SIZE) bytes. However, the skb buffer's true size is
> > 16640 bytes for alignment after allocated, x86_64 for
From: Jian-Hong Pan
> Sent: 25 July 2019 09:09
> Each skb as the element in RX ring was expected with sized buffer 8216
> (RTK_PCI_RX_BUF_SIZE) bytes. However, the skb buffer's true size is
> 16640 bytes for alignment after allocated, x86_64 for example. And, the
> difference will be enlarged 512
Each skb as the element in RX ring was expected with sized buffer 8216
(RTK_PCI_RX_BUF_SIZE) bytes. However, the skb buffer's true size is
16640 bytes for alignment after allocated, x86_64 for example. And, the
difference will be enlarged 512 times (RTK_MAX_RX_DESC_NUM).
To prevent that much
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