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Wed, 28 Aug 2019 14:22:22 +0000 (UTC) Received: from dresden.str.redhat.com (ovpn-204-32.brq.redhat.com [10.40.204.32]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 34BBC6012D; Wed, 28 Aug 2019 14:22:13 +0000 (UTC) To: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org References: <20190826161312.489398-1-vsementsov@virtuozzo.com> <20190826161312.489398-3-vsementsov@virtuozzo.com> From: Max Reitz Openpgp: preference=signencrypt Autocrypt: addr=mreitz@redhat.com; prefer-encrypt=mutual; keydata= mQENBFXOJlcBCADEyyhOTsoa/2ujoTRAJj4MKA21dkxxELVj3cuILpLTmtachWj7QW+TVG8U /PsMCFbpwsQR7oEy8eHHZwuGQsNpEtNC2G/L8Yka0BIBzv7dEgrPzIu+W3anZXQW4702+uES U29G8TP/NGfXRRHGlbBIH9KNUnOSUD2vRtpOLXkWsV5CN6vQFYgQfFvmp5ZpPeUe6xNplu8V mcTw8OSEDW/ZnxJc8TekCKZSpdzYoxfzjm7xGmZqB18VFwgJZlIibt1HE0EB4w5GsD7x5ekh awIe3RwoZgZDLQMdOitJ1tUc8aqaxvgA4tz6J6st8D8pS//m1gAoYJWGwwIVj1DjTYLtABEB AAG0HU1heCBSZWl0eiA8bXJlaXR6QHJlZGhhdC5jb20+iQFTBBMBCAA9AhsDBQkSzAMABQsJ CAcCBhUICQoLAgQWAgMBAh4BAheABQJVzie5FRhoa3A6Ly9rZXlzLmdudXBnLm5ldAAKCRD0 B9sAYdXPQDcIB/9uNkbYEex1rHKz3mr12uxYMwLOOFY9fstP5aoVJQ1nWQVB6m2cfKGdcRe1 2/nFaHSNAzT0NnKz2MjhZVmcrpyd2Gp2QyISCfb1FbT82GMtXFj1wiHmPb3CixYmWGQUUh+I AvUqsevLA+WihgBUyaJq/vuDVM1/K9Un+w+Tz5vpeMidlIsTYhcsMhn0L9wlCjoucljvbDy/ 8C9L2DUdgi3XTa0ORKeflUhdL4gucWoAMrKX2nmPjBMKLgU7WLBc8AtV+84b9OWFML6NEyo4 4cP7cM/07VlJK53pqNg5cHtnWwjHcbpGkQvx6RUx6F1My3y52vM24rNUA3+ligVEgPYBuQEN BFXOJlcBCADAmcVUNTWT6yLWQHvxZ0o47KCP8OcLqD+67T0RCe6d0LP8GsWtrJdeDIQk+T+F xO7DolQPS6iQ6Ak2/lJaPX8L0BkEAiMuLCKFU6Bn3lFOkrQeKp3u05wCSV1iKnhg0UPji9V2 W5eNfy8F4ZQHpeGUGy+liGXlxqkeRVhLyevUqfU0WgNqAJpfhHSGpBgihUupmyUg7lfUPeRM DzAN1pIqoFuxnN+BRHdAecpsLcbR8sQddXmDg9BpSKozO/JyBmaS1RlquI8HERQoe6EynJhd 64aICHDfj61rp+/0jTIcevxIIAzW70IadoS/y3DVIkuhncgDBvGbF3aBtjrJVP+5ABEBAAGJ ASUEGAEIAA8FAlXOJlcCGwwFCRLMAwAACgkQ9AfbAGHVz0CbFwf9F/PXxQR9i4N0iipISYjU sxVdjJOM2TMut+ZZcQ6NSMvhZ0ogQxJ+iEQ5OjnIputKvPVd5U7WRh+4lF1lB/NQGrGZQ1ic alkj6ocscQyFwfib+xIe9w8TG1CVGkII7+TbS5pXHRxZH1niaRpoi/hYtgzkuOPp35jJyqT/ /ELbqQTDAWcqtJhzxKLE/ugcOMK520dJDeb6x2xVES+S5LXby0D4juZlvUj+1fwZu+7Io5+B bkhSVPb/QdOVTpnz7zWNyNw+OONo1aBUKkhq2UIByYXgORPFnbfMY7QWHcjpBVw9MgC4tGeF R4bv+1nAMMxKmb5VvQCExr0eFhJUAHAhVg== Message-ID: <6c22ee44-4875-92e5-273b-53276cdec860@redhat.com> Date: Wed, 28 Aug 2019 16:22:11 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190826161312.489398-3-vsementsov@virtuozzo.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="XqnZ7lt1SJ6eHcTehx64GSFMwu3hO4dcu" X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 28 Aug 2019 14:22:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-devel] [PATCH v9 02/13] block/backup: split shareable copying part from backup_do_cow X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, kwolf@redhat.com, wencongyang2@huawei.com, xiechanglong.d@gmail.com, qemu-devel@nongnu.org, armbru@redhat.com, jsnow@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --XqnZ7lt1SJ6eHcTehx64GSFMwu3hO4dcu Content-Type: multipart/mixed; boundary="oxd6zX0qINs2ObUFAtXjJQ0Kn424tXHOV"; protected-headers="v1" From: Max Reitz To: Vladimir Sementsov-Ogievskiy , qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, eblake@redhat.com, armbru@redhat.com, xiechanglong.d@gmail.com, wencongyang2@huawei.com, fam@euphon.net, stefanha@redhat.com, jsnow@redhat.com, kwolf@redhat.com, den@openvz.org Message-ID: <6c22ee44-4875-92e5-273b-53276cdec860@redhat.com> Subject: Re: [PATCH v9 02/13] block/backup: split shareable copying part from backup_do_cow References: <20190826161312.489398-1-vsementsov@virtuozzo.com> <20190826161312.489398-3-vsementsov@virtuozzo.com> In-Reply-To: <20190826161312.489398-3-vsementsov@virtuozzo.com> --oxd6zX0qINs2ObUFAtXjJQ0Kn424tXHOV Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 26.08.19 18:13, Vladimir Sementsov-Ogievskiy wrote: > Split copying logic which will be shared with backup-top filter. >=20 > Signed-off-by: Vladimir Sementsov-Ogievskiy > --- > block/backup.c | 47 ++++++++++++++++++++++++++++++++--------------- > 1 file changed, 32 insertions(+), 15 deletions(-) >=20 > diff --git a/block/backup.c b/block/backup.c > index 33b144305f..13a1d80157 100644 > --- a/block/backup.c > +++ b/block/backup.c > @@ -248,26 +248,18 @@ static int64_t backup_bitmap_reset_unallocated(Ba= ckupBlockJob *s, > return ret; > } > =20 > -static int coroutine_fn backup_do_cow(BackupBlockJob *job, > - int64_t offset, uint64_t bytes, > - bool *error_is_read, > - bool is_write_notifier) > +static int coroutine_fn backup_do_copy(BackupBlockJob *job, > + int64_t offset, uint64_t bytes,= > + bool *error_is_read, > + bool is_write_notifier) > { > - CowRequest cow_request; > int ret =3D 0; > - int64_t start, end; /* bytes */ > + int64_t start =3D offset, end =3D bytes + offset; /* bytes */ Maybe just rename the =E2=80=9Coffset=E2=80=9D parameter to =E2=80=9Cstar= t=E2=80=9D, replace the =E2=80=9Cbytes=E2=80=9D parameter by an =E2=80=9Cend=E2=80=9D parameter, and drop this line? Max > void *bounce_buffer =3D NULL; > int64_t status_bytes; > =20 > - qemu_co_rwlock_rdlock(&job->flush_rwlock); > - > - start =3D QEMU_ALIGN_DOWN(offset, job->cluster_size); > - end =3D QEMU_ALIGN_UP(bytes + offset, job->cluster_size); > - > - trace_backup_do_cow_enter(job, start, offset, bytes); > - > - wait_for_overlapping_requests(job, start, end); > - cow_request_begin(&cow_request, job, start, end); > + assert(QEMU_IS_ALIGNED(start, job->cluster_size)); > + assert(QEMU_IS_ALIGNED(end, job->cluster_size)); > =20 > while (start < end) { > int64_t dirty_end; --oxd6zX0qINs2ObUFAtXjJQ0Kn424tXHOV-- --XqnZ7lt1SJ6eHcTehx64GSFMwu3hO4dcu Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEkb62CjDbPohX0Rgp9AfbAGHVz0AFAl1mjhMACgkQ9AfbAGHV z0BSqQf9FyvWpfsTLR8wQvMO1WeUlaQjFk7pEl3ZQ35VGmqMqALkQD+s+2N5psIg 8aE5v6ogguwpinO0Whjx/4WcX/ma36IogodkMB2e7wy7bmoHk7TYclpuJd5wmcem D4QPHoJg0rv73+z4AYvNHhaWz0cFsag/5cYoeasiKtUfO84V2EkMv46bBHXzRZJf UcCVwNI7rxCCcyjjOkiPr0DDpdbkFZsTroWxZFdz5yb765FdkstCWJEses+yCV5D 9py0K5FB9tXrKsSSQu++K7dwWQtE0iadmepEew9cxev30rQVKnt350A8/SbTibZ4 vlcA2B+ScDCLtP44zHJRnl4jkCa+Ww== =Kfb8 -----END PGP SIGNATURE----- --XqnZ7lt1SJ6eHcTehx64GSFMwu3hO4dcu--