Re: [PATCH net v2] ipv6: fix a BUG in rt6_get_pcpu_route() under PREEMPT_RT

[Jiayuan Chen]

December 23, 2025 at 01:26, "Steven Rostedt" <rostedt@xxxxxxxxxxx mailto:rostedt@xxxxxxxxxxx?to=%22Steven%20Rostedt%22%20%3Crostedt%40goodmis.org%3E > wrote:


> 
> On Mon, 22 Dec 2025 12:16:39 -0500
> Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> 
> > 
> > On Mon, 22 Dec 2025 09:50:58 +0100
> >  Eric Dumazet <edumazet@xxxxxxxxxx> wrote:
> >  
> >  > Link: https://syzkaller.appspot.com/bug?extid=9b35e9bc0951140d13e6
> >  > Fixes: 951f788a80ff ("ipv6: fix a BUG in rt6_get_pcpu_route()") 
> >  
> >  I would rather find when PREEMPT_RT was added/enabled, there is no
> >  point blaming such an old commit
> >  which was correct at the time, and forcing pointless backports to old
> >  linux kernels. 
> >  
> >  Ack!
> > 
> Fixes: d2d6422f8bd1 ("x86: Allow to enable PREEMPT_RT.")
> 
> That was the first commit to enable PREEMPT_RT on any architecture (just
> happened to be x86).
> 
> -- Steve
>

Thanks Steve, it helped a lot !