linux-kernel - Re: [PATCH for-next v3 1/7] RDMA/rxe: Convert triple tasklets to use workqueue

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Message-ID: <Y607lVbzs9PTd0m+@unreal>
Date:   Thu, 29 Dec 2022 09:02:45 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Bob Pearson <rpearsonhpe@...il.com>
Cc:     Daisuke Matsuda <matsuda-daisuke@...itsu.com>,
        linux-rdma@...r.kernel.org, jgg@...dia.com, zyjzyj2000@...il.com,
        nvdimm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        yangx.jy@...itsu.com, lizhijian@...itsu.com, y-goto@...itsu.com
Subject: Re: [PATCH for-next v3 1/7] RDMA/rxe: Convert triple tasklets to use
 workqueue

On Wed, Dec 28, 2022 at 10:56:11AM -0600, Bob Pearson wrote:
> On 12/23/22 00:51, Daisuke Matsuda wrote:
> > In order to implement On-Demand Paging on the rxe driver, triple tasklets
> > (requester, responder, and completer) must be allowed to sleep so that they
> > can trigger page fault when pages being accessed are not present.
> > 
> > This patch replaces the tasklets with a workqueue, but still allows direct-
> > call of works from softirq context if it is obvious that MRs are not going
> > to be accessed and there is no work being processed in the workqueue.
> 
> There are already at least two patch sets that do this waiting to get upstream

I don't see any unhandled RXE series, except of this one patch [1],
which is one out larger series.

[1] https://patchwork.kernel.org/project/linux-rdma/patch/20221029031331.64518-1-rpearsonhpe@gmail.com/

> Bob