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bh=djhTRJGJg3J6BeW0ceDPJuujST4T2Jt9ExZ596qYokQ=; b=evDxedQj6ZvVB7RZnWuriP/fMNKoZ9lTAlAe2CWemnHDplELSLSXgkgREzt2tC2UlMiJmf jL7RQvs1ToIXejBQSh+GGZlCCW6KiHzImSMQ6AqnJqhkvgrTW1ZHkTXnptS25L9y0H5EAU ehijplBgPmpOG1FEesNDFfV5BWk4+1w= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-373-9NkikARFNxGCYD4QHeGSrw-1; Tue, 26 Jan 2021 03:10:32 -0500 X-MC-Unique: 9NkikARFNxGCYD4QHeGSrw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C1FF51005D6E; Tue, 26 Jan 2021 08:10:17 +0000 (UTC) Received: from [10.72.12.70] (ovpn-12-70.pek2.redhat.com [10.72.12.70]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1C5EE77BE1; Tue, 26 Jan 2021 08:09:48 +0000 (UTC) Subject: Re: [RFC v3 10/11] vduse: grab the module's references until there is no vduse device To: Xie Yongji , mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, bob.liu@oracle.com, hch@infradead.org, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net References: <20210119045920.447-1-xieyongji@bytedance.com> <20210119050756.600-1-xieyongji@bytedance.com> <20210119050756.600-4-xieyongji@bytedance.com> From: Jason Wang Message-ID: <406479e4-a4f8-63f3-38f5-b1c3bb6e31ab@redhat.com> Date: Tue, 26 Jan 2021 16:09:47 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210119050756.600-4-xieyongji@bytedance.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Cc: linux-aio@kvack.org, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Ck9uIDIwMjEvMS8xOSDkuIvljYgxOjA3LCBYaWUgWW9uZ2ppIHdyb3RlOgo+IFRoZSBtb2R1bGUg c2hvdWxkIG5vdCBiZSB1bmxvYWRlZCBpZiBhbnkgdmR1c2UgZGV2aWNlIGV4aXN0cy4KPiBTbyBp bmNyZWFzZSB0aGUgbW9kdWxlJ3MgcmVmZXJlbmNlIGNvdW50IHdoZW4gY3JlYXRpbmcgdmR1c2UK PiBkZXZpY2UuIEFuZCB0aGUgcmVmZXJlbmNlIGNvdW50IGlzIGtlcHQgdW50aWwgdGhlIGRldmlj ZSBpcwo+IGRlc3Ryb3llZC4KPgo+IFNpZ25lZC1vZmYtYnk6IFhpZSBZb25namkgPHhpZXlvbmdq aUBieXRlZGFuY2UuY29tPgoKCkxvb2tzIGxpa2UgYSBidWcgZml4LiBJZiB5ZXMsIGxldCdzIHNx dWFzaCB0aGlzIGludG8gcGF0Y2ggOC4KClRoYW5rcwoKCj4gLS0tCj4gICBkcml2ZXJzL3ZkcGEv dmRwYV91c2VyL3ZkdXNlX2Rldi5jIHwgMiArKwo+ICAgMSBmaWxlIGNoYW5nZWQsIDIgaW5zZXJ0 aW9ucygrKQo+Cj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmRwYS92ZHBhX3VzZXIvdmR1c2VfZGV2 LmMgYi9kcml2ZXJzL3ZkcGEvdmRwYV91c2VyL3ZkdXNlX2Rldi5jCj4gaW5kZXggNGQyMTIwM2Rh NWI2Li4wMDNhZWIyODFiY2UgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy92ZHBhL3ZkcGFfdXNlci92 ZHVzZV9kZXYuYwo+ICsrKyBiL2RyaXZlcnMvdmRwYS92ZHBhX3VzZXIvdmR1c2VfZGV2LmMKPiBA QCAtOTc4LDYgKzk3OCw3IEBAIHN0YXRpYyBpbnQgdmR1c2VfZGVzdHJveV9kZXYodTMyIGlkKQo+ ICAgCWtmcmVlKGRldi0+dnFzKTsKPiAgIAl2ZHVzZV9kb21haW5fZGVzdHJveShkZXYtPmRvbWFp bik7Cj4gICAJdmR1c2VfZGV2X2Rlc3Ryb3koZGV2KTsKPiArCW1vZHVsZV9wdXQoVEhJU19NT0RV TEUpOwo+ICAgCj4gICAJcmV0dXJuIDA7Cj4gICB9Cj4gQEAgLTEwMjIsNiArMTAyMyw3IEBAIHN0 YXRpYyBpbnQgdmR1c2VfY3JlYXRlX2RldihzdHJ1Y3QgdmR1c2VfZGV2X2NvbmZpZyAqY29uZmln KQo+ICAgCj4gICAJZGV2LT5jb25uZWN0ZWQgPSB0cnVlOwo+ICAgCWxpc3RfYWRkKCZkZXYtPmxp c3QsICZ2ZHVzZV9kZXZzKTsKPiArCV9fbW9kdWxlX2dldChUSElTX01PRFVMRSk7Cj4gICAKPiAg IAlyZXR1cm4gZmQ7Cj4gICBlcnJfZmQ6CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRp b25AbGlzdHMubGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRp b24ub3JnL21haWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=