Re: [PATCH net] net/rds: use wq_has_sleeper() in rds_cong_map_updated()

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Fri, 21 Aug 2026 22:26:47 -0700 you wrote:
> rds_cong_map_updated() runs after a peer's congestion map has been
> rewritten (by rds_tcp_cong_recv() and rds_ib_cong_recv(), or the
> clear-all in the loopback and IB send-completion paths).  It bumps
> rds_cong_generation and then checks waitqueue_active() on
> map->m_waitq and on rds_poll_waitq to decide whether anyone needs
> waking.  atomic_inc() carries no ordering and waitqueue_active() is a
> plain load, so nothing orders the map and generation stores before
> the wait queue reads.  The waiters do the mirror image: rds_cong_wait()
> adds itself to m_waitq and then tests the port bit, and rds_poll()
> registers on rds_poll_waitq and then reads the generation.  That is
> the store-buffering pattern described above waitqueue_active() in
> include/linux/wait.h - the updater can observe an empty wait queue
> while the waiter still observes the port as congested, and no wake-up
> is issued.
> 
> [...]

Here is the summary with links:
  - [net] net/rds: use wq_has_sleeper() in rds_cong_map_updated()
    https://git.kernel.org/netdev/net/c/d4f484661961

You are awesome, thank you!
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