Re: [PATCH net] net: count last skb of each sk_backlog pass in __release_sock()

[Ray Zhang]

On Sun, Nov 1, 2026 at 9:15 AM Kuniyuki Iwashima <kuniyu@xxxxxxxxxx> wrote:
>
> On Sun, 01 Nov 2026 00:51:45 -0700, Ray Zhang wrote:
> > Running 500 concurrent TCPv6 streams (neper "tcp_stream -6 -T 1 -F 500")
> > on a 2-core Cortex-A53 (CONFIG_PREEMPT_NONE=y, HZ=1000, LATENCY_WARN)
>
> I guess you tested it on 6.18, but note that CONFIG_PREEMPT_NONE
> is no longer selectable on arm64 since 7dadeaa6e851.

Right, we hit and tested this on 6.18 -- thanks for pointing out
7dadeaa6e851 and for the review!

On mainline, cond_resched() in __release_sock() still applies to
!ARCH_HAS_PREEMPT_LAZY configs (e.g. CONFIG_PREEMPT_VOLUNTARY on
32-bit arm/mips/sparc, or CONFIG_PREEMPT_NONE with ARCH_NO_PREEMPT),
and landing it in net lets 6.18.y stable backport it cleanly.