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SubjectRe: Re: Re: Re: Re: Re: [PATCH] rdma/siw: avoid smp_store_mb() on a u64
-----"Jason Gunthorpe" <> wrote: -----

>To: "Bernard Metzler" <>
>From: "Jason Gunthorpe" <>
>Date: 07/12/2019 07:45PM
>Cc: "Arnd Bergmann" <>, "Doug Ledford"
><>, "Peter Zijlstra" <>,
>Subject: [EXTERNAL] Re: Re: Re: Re: Re: [PATCH] rdma/siw: avoid
>smp_store_mb() on a u64
>On Fri, Jul 12, 2019 at 05:40:43PM +0000, Bernard Metzler wrote:
>> It is because there are two levels a CQ can be armed:
>> #include <infiniband/verbs.h>
>> int ibv_req_notify_cq(struct ibv_cq *cq, int
>> If we kick the CQ handler, we have to clear the whole
>> thing. The user later again decides how he wants to get it
>> re-armed...SOLICITED completions only, or ALL signaled.
>Arrange it so only one of the two bits is ever set and do two
>test-and-set bits when a SOLICITED CQE comes in?
right, but that's too easy ;)
I'll probably do it along those lines.

Many thanks,

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