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Date:   Tue, 13 Apr 2021 16:43:04 -0400
From:   Peter Xu <peterx@redhat.com>
To:     Axel Rasmussen <axelrasmussen@google.com>
Cc:     Alexander Viro <viro@zeniv.linux.org.uk>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Hugh Dickins <hughd@google.com>,
        Jerome Glisse <jglisse@redhat.com>,
        Joe Perches <joe@perches.com>,
        Lokesh Gidra <lokeshgidra@google.com>,
        Mike Kravetz <mike.kravetz@oracle.com>,
        Mike Rapoport <rppt@linux.vnet.ibm.com>,
        Shaohua Li <shli@fb.com>, Shuah Khan <shuah@kernel.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Wang Qing <wangqing@vivo.com>, linux-api@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, linux-mm@kvack.org,
        Brian Geffon <bgeffon@google.com>,
        "Dr . David Alan Gilbert" <dgilbert@redhat.com>,
        Mina Almasry <almasrymina@google.com>,
        Oliver Upton <oupton@google.com>
Subject: Re: [PATCH v2 3/9] userfaultfd/shmem: support minor fault
 registration for shmem
Message-ID: <20210413204304.GG4440@xz-x1>
References: <20210413051721.2896915-1-axelrasmussen@google.com>
 <20210413051721.2896915-4-axelrasmussen@google.com>
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In-Reply-To: <20210413051721.2896915-4-axelrasmussen@google.com>
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On Mon, Apr 12, 2021 at 10:17:15PM -0700, Axel Rasmussen wrote:
> This patch allows shmem-backed VMAs to be registered for minor faults.
> Minor faults are appropriately relayed to userspace in the fault path,
> for VMAs with the relevant flag.
> 
> This commit doesn't hook up the UFFDIO_CONTINUE ioctl for shmem-backed
> minor faults, though, so userspace doesn't yet have a way to resolve
> such faults.
> 
> Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>

Everything looks right to me, but it'll be great if Andrea or Hugh will have a
look too.

Acked-by: Peter Xu <peterx@redhat.com>

-- 
Peter Xu