Hello:
This patch was applied to netdev/net-next.git (main)
by Paolo Abeni <pab...@redhat.com>:
On Thu, 21 Aug 2025 06:02:15 -0700 you wrote:
> POWER8 support a maximum of 16 subcrq indirect descriptor entries per
> H_SEND_SUB_CRQ_INDIRECT call, while POWER9 and newer hypervisors
> support up to 128 entries. Increasing the max number of indirect
> descriptor entries improves batching efficiency and reduces
> hcall overhead, which enhances throughput under large workload on POWER9+.
>
> Currently, ibmvnic driver always uses a fixed number of max indirect
> descriptor entries (16). send_subcrq_indirect() treats all hypervisor
> errors the same:
> - Cleanup and Drop the entire batch of descriptors.
> - Return an error to the caller.
> - Rely on TCP/IP retransmissions to recover.
> - If the hypervisor returns H_PARAMETER (e.g., because 128
> entries are not supported on POWER8), the driver will continue
> to drop batches, resulting in unnecessary packet loss.
>
> [...]
Here is the summary with links:
- [net-next,RESEND,v4] ibmvnic: Increase max subcrq indirect entries with
fallback
https://git.kernel.org/netdev/net-next/c/3c14917953a5
You are awesome, thank you!
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