> On Oct 6, 2026, at 10:56 PM, Cunlong Li <[email protected]> wrote: > > 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.
Thank you!!! Joel > > Thanks, > Cunlong > >> >> Thanks, >> >> Joel Fernandes >> >>
