From: Jason Gunthorpe <jgg@ziepe.ca>
To: 杨帆 <yangfan.fan@bytedance.com>
Cc: Zhu Yanjun <zyjzyj2000@gmail.com>,
Zhu Yanjun <yanjunz@mellanox.com>,
linux-rdma@vger.kernel.org
Subject: Re: [External] [PATCH] RDMA/rxe: fix retry forever when rnr_retry >= 7
Date: Fri, 24 Jul 2020 11:18:44 -0300 [thread overview]
Message-ID: <20200724141844.GO25301@ziepe.ca> (raw)
In-Reply-To: <827596D2-8EB2-4660-9118-70289FCD09AA@bytedance.com>
On Fri, Jul 24, 2020 at 10:04:01PM +0800, 杨帆 wrote:
> >
> > Please read the following from IB specification
> >
>
> Oh I see, I missed that part. Thanks for your explanation.
>
>
> > An exception to
> > the following is if the RNR NAK retry counter is set to 7. This value indicates
> > infinite retry and the counter is not decremented.
>
> I wonder what if the user set RNR retry larger than 7? Say the user set the RNR
> retry attribute to 10, is he expecting a 10-time retry or an infinite retry? In
> the current implementation, any larger-than-7 retry count causes infinite retry.
> Is this an expected behavior?
Out of range values should be rejected at modify_qp time
Jason
next prev parent reply other threads:[~2020-07-24 14:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-23 13:25 [PATCH] RDMA/rxe: fix retry forever when rnr_retry >= 7 Fan Yang
2020-07-23 15:42 ` Zhu Yanjun
2020-07-24 14:04 ` [External] " 杨帆
2020-07-24 14:18 ` Jason Gunthorpe [this message]
2020-07-24 14:20 ` Fan Yang
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