From: Neil Horman <nhor...@tuxdriver.com> Date: Wed, 3 Jan 2018 05:42:04 -0500
> On Tue, Jan 02, 2018 at 09:48:27PM -0500, David Miller wrote: >> And for the RX cases, it allows the RX ring to deplete to empty which >> tends to hang most chips. You need to make the DMA failure detection >> early and recycle the RX buffer back to the chip instead of passing >> it up to the stack. >> > Strictly speaking, I think we're ok here, because the dirty_rx counter > creates a > contiguous area to refill, and we will just pick up where we left off on the > next napi poll. If you continually fail the mappings, even NAPI poll, eventually the RX ring will empty. I don't think we're ok here.
