Re: [PATCH net-next v7] ipv6: Fix soft lockups in fib6_select_path under high next hop churn

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Tue,  5 Nov 2024 17:02:36 -0800 you wrote:
> Soft lockups have been observed on a cluster of Linux-based edge routers
> located in a highly dynamic environment. Using the `bird` service, these
> routers continuously update BGP-advertised routes due to frequently
> changing nexthop destinations, while also managing significant IPv6
> traffic. The lockups occur during the traversal of the multipath
> circular linked-list in the `fib6_select_path` function, particularly
> while iterating through the siblings in the list. The issue typically
> arises when the nodes of the linked list are unexpectedly deleted
> concurrently on a different core—indicated by their 'next' and
> 'previous' elements pointing back to the node itself and their reference
> count dropping to zero. This results in an infinite loop, leading to a
> soft lockup that triggers a system panic via the watchdog timer.
> 
> [...]

Here is the summary with links:
  - [net-next,v7] ipv6: Fix soft lockups in fib6_select_path under high next hop churn
    https://git.kernel.org/netdev/net-next/c/d9ccb18f83ea

You are awesome, thank you!
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