On 2022/6/30 04:09, Wenjia Zhang wrote: > > Since Karsten's suggestion, we didn't hear from you any more. We just want to know: > > - What do you think about the commit (86434744)? Could it be the trigger of the problem you met? > > - Have you ever tried to just remove the following lines from smc_connection(), and check if your scenario could run correctly? > > if (smc->use_fallback) > goto out; > > In our opinion, we don't see the necessity of the patch, if partly reverting the commit (86434744) could solve the problem. I'm so sorry I missed the last emails for this discussion. Yes, commit (86434744) is the trigger of the problem described in https://lore.kernel.org/linux-s390/45a19f8b-1b64-3459-c28c-aebab4fd8f1e@xxxxxxxxxxxxxxxxx/#t . And I have tested just remove the following lines from smc_connection() can solve the above problem. if (smc->use_fallback) goto out; I aggree that partly reverting the commit (86434744) is a better solution. Thanks, Guangguan Wang