linux-kernel - Re: [GIT PULL] Please pull RDMA subsystem changes

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Message-ID: <CAHk-=wj4ay=jy6wuN4d9p9v+O32i0aH9SMfu39VKP-Ai7hKp=g@mail.gmail.com>
Date:   Sun, 28 Apr 2019 09:59:56 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Jason Gunthorpe <jgg@...lanox.com>
Cc:     Doug Ledford <dledford@...hat.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] Please pull RDMA subsystem changes

On Sun, Apr 28, 2019 at 4:52 AM Jason Gunthorpe <jgg@...lanox.com> wrote:
>
> Nothing particularly special here. There is a small merge conflict
> with Adrea's mm_still_valid patches which is resolved as below:

I still don't understand *why* you play the crazy VM games to begin with.

What's wrong with just returning SIGBUS? Why does that
rdma_umap_fault() not just look like this one-liner:

        return VM_FAULT_SIGBUS;

without the crazy parts? Nobody ever explained why you'd want to have
that silly "let's turn it into a bogus anonymous mapping".

I've pulled this, but why do the rdma and SCSI people always do these
strange and pointless things?

                  Linus