On Tue, Oct 06, 2026 at 05:27:51PM -0400, Joel Fernandes wrote: > > > On 10/6/2026 9:17 AM, Cunlong Li wrote: > >> It sounds like you do know that it is likely transient - but based on this > >> description and the below, it sounds like you have not yet found a use of > >> this patch. > >> > >> > > To be precise, we worry that some of the stalls were transient, so a > > panic reboot would affect the users. But we have no hard evidence > > either way: every incident ended in a forced reset, and the dmesg was > > lost. Going forward, we plan to enable the NMI and kdump to keep > > investigating the cause of the RCU stalls. We will also monitor dmesg > > to confirm whether transient RCU stalls actually occur. > > > Right, I just worry that if you're not seeing recoverable/transient stalls and > you start using this patch, then you might be causing side-effects that don't > really help your problem and might be masking the real issue. It would be good > to debug this further, and fix the right way IMO. > > If you show that this patch indeed helps your problem, we can consider it for > 7.5, but there's little bit of time. :-)
Hi Joel, Understood, thanks. We will keep monitoring dmesg for the root cause. Once we observe self-recovering RCU stalls, we will resubmit the patch with the evidence. Thanks, Cunlong > > Thanks, > > Joel Fernandes > >
