Thread (2 messages) 2 messages, 2 authors, 2022-08-31

Re: [PATCH bpf] xsk: fix backpressure mechanism on Tx

From: patchwork-bot+netdevbpf@kernel.org
Date: 2022-08-31 19:00:38
Also in: bpf

Hello:

This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann [off-list ref]:

On Tue, 30 Aug 2022 14:17:05 +0200 you wrote:
Commit d678cbd2f867 ("xsk: Fix handling of invalid descriptors in XSK TX
batching API") fixed batch API usage against set of descriptors with
invalid ones but introduced a problem when AF_XDP SW rings are smaller
than HW ones. Mismatch of reported Tx'ed frames between HW generator and
user space app was observed. It turned out that backpressure mechanism
became a bottleneck when the amount of produced descriptors to CQ is
lower than what we grabbed from XSK Tx ring.

[...]
Here is the summary with links:
  - [bpf] xsk: fix backpressure mechanism on Tx
    https://git.kernel.org/bpf/bpf/c/c00c4461689e

You are awesome, thank you!
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