linux-kernel - Re: [PATCH rdma-next v2 0/7] Enable asynchronous event FD per object

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Date:   Thu, 21 May 2020 20:50:46 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Leon Romanovsky <leon@...nel.org>
Cc:     Doug Ledford <dledford@...hat.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
        Yishai Hadas <yishaih@...lanox.com>
Subject: Re: [PATCH rdma-next v2 0/7] Enable asynchronous event FD per object

On Tue, May 19, 2020 at 10:27:04AM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...lanox.com>
> 
> Changelog:
> v2:
>  * Added READ_ONCE to all default_async_file calls
>  * Rebased on latest rdma/wip/jgg-for-next
>  * Removed uninitalized_var?()
>  * Simplified uverbs_free_srq()
>  * Put uverbs_finalize_uobj_create() after object is finalized
> v1: https://lore.kernel.org/lkml/20200506082444.14502-1-leon@kernel.org
>  * Forgot to add patch "IB/uverbs: Move QP, SRQ, WQ type and flags to UAPI"
> v0: https://lore.kernel.org/lkml/20200506074049.8347-1-leon@kernel.org
> 
> >From Yishai:
> 
> This series enables applicable events objects (i.e. QP, SRQ, CQ, WQ) to
> be created with their own asynchronous event FD.
> 
> Before this series any affiliated event on an object was reported on the
> first asynchronous event FD that was created on the context without the
> ability to create and use a dedicated FD for it.
> 
> With this series we enable granularity and control for the usage per
> object, according to the application's usage.
> 
> For example, a secondary process that uses the same command FD as of the
> master one, can create its own objects with its dedicated event FD to be
> able to get the events for them once occurred, this couldn't be done
> before this series.
> 
> To achieve the above, any 'create' method for the applicable objects was
> extended to get from rdma-core its optional event FD, if wasn't
> supplied, the default one from the context will be used.
> 
> As we prefer to not extend the 'write' mode KABIs anymore and fully
> move to the 'ioct' mode, as part of this extension QP, SRQ and WQ
> create/destroy commands were introduced over 'ioctl', the CQ KABI was
> extended over its existing 'ioctl' create command.
> 
> As part of moving to 'ioctl' for the above objects the frame work was
> improved to abort a fully created uobject upon some later error, some
> flows were consolidated with the 'write' mode and few bugs were found
> and fixed.
> 
> Yishai
> 
> Jason Gunthorpe (1):
>   RDMA/core: Allow the ioctl layer to abort a fully created uobject
> 
> Yishai Hadas (6):
>   IB/uverbs: Refactor related objects to use their own asynchronous
>     event FD
>   IB/uverbs: Extend CQ to get its own asynchronous event FD
>   IB/uverbs: Move QP, SRQ, WQ type and flags to UAPI
>   IB/uverbs: Introduce create/destroy SRQ commands over ioctl
>   IB/uverbs: Introduce create/destroy WQ commands over ioctl
>   IB/uverbs: Introduce create/destroy QP commands over ioctl

Applied to for-next

Thanks,
Jason