From: sagi@grimberg.me (Sagi Grimberg)
Subject: [PATCH 0/2] Get rid of transport layer retry count config parameter
Date: Wed, 20 Jul 2016 11:42:04 +0300 [thread overview]
Message-ID: <578F395C.3000006@grimberg.me> (raw)
In-Reply-To: <12b64608-1d42-ffe6-c11a-58139cbabd3a@sandisk.com>
> The IB spec defines an end-to-end credit mechanism for RC connections.
> So if the transport layer is reliable (InfiniBand, RoCE with DCB
> enabled) setting the retry count high enough is only needed to avoid
> connection shutdown due to brief cable disconnect/reconnect events.
Right, this is why I think the driver can use whatever it sees fit (we
have a keep-alive mechanism for fast-fail functionality).
WARNING: multiple messages have this Message-ID (diff)
From: Sagi Grimberg <sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org>
To: Bart Van Assche
<bart.vanassche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: linux-nvme-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 0/2] Get rid of transport layer retry count config parameter
Date: Wed, 20 Jul 2016 11:42:04 +0300 [thread overview]
Message-ID: <578F395C.3000006@grimberg.me> (raw)
In-Reply-To: <12b64608-1d42-ffe6-c11a-58139cbabd3a-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>
> The IB spec defines an end-to-end credit mechanism for RC connections.
> So if the transport layer is reliable (InfiniBand, RoCE with DCB
> enabled) setting the retry count high enough is only needed to avoid
> connection shutdown due to brief cable disconnect/reconnect events.
Right, this is why I think the driver can use whatever it sees fit (we
have a keep-alive mechanism for fast-fail functionality).
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next prev parent reply other threads:[~2016-07-20 8:42 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-22 12:05 [PATCH 0/2] Get rid of transport layer retry count config parameter Sagi Grimberg
2016-06-22 12:06 ` [PATCH 1/2] nvme-rdma: Don't use tl_retry_count Sagi Grimberg
2016-06-22 12:06 ` [PATCH 2/2] nvme-fabrics: Remove tl_retry_count Sagi Grimberg
2016-06-22 16:15 ` [PATCH 0/2] Get rid of transport layer retry count config parameter Christoph Hellwig
2016-06-22 16:15 ` Christoph Hellwig
2016-06-22 16:31 ` Sagi Grimberg
2016-06-22 16:31 ` Sagi Grimberg
2016-06-22 20:31 ` Jason Gunthorpe
2016-06-22 20:31 ` Jason Gunthorpe
2016-06-23 7:09 ` Sagi Grimberg
2016-06-23 7:09 ` Sagi Grimberg
2016-06-24 7:13 ` Christoph Hellwig
2016-06-24 7:13 ` Christoph Hellwig
2016-06-26 15:48 ` Sagi Grimberg
2016-06-26 15:48 ` Sagi Grimberg
2016-07-17 11:52 ` Sagi Grimberg
2016-07-17 11:52 ` Sagi Grimberg
2016-07-18 4:09 ` Christoph Hellwig
2016-07-18 4:09 ` Christoph Hellwig
2016-07-18 4:09 ` Christoph Hellwig
2016-07-18 4:09 ` Christoph Hellwig
2016-07-18 8:01 ` Sagi Grimberg
2016-07-18 8:01 ` Sagi Grimberg
2016-07-18 15:20 ` Bart Van Assche
2016-07-18 15:20 ` Bart Van Assche
2016-07-20 8:42 ` Sagi Grimberg [this message]
2016-07-20 8:42 ` Sagi Grimberg
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