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a="24628640" X-IronPort-AV: E=Sophos;i="6.08,213,1712646000"; d="scan'208";a="24628640" X-CSE-ConnectionGUID: SNLlnWlYRpmKjdFVEObI0w== X-CSE-MsgGUID: zmN9E6odTz+azEp7MIMQRQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,213,1712646000"; d="scan'208";a="37246864" From: Yuan Liu To: peterx@redhat.com, farosas@suse.de, pbonzini@redhat.com, marcandre.lureau@redhat.com, berrange@redhat.com, thuth@redhat.com, philmd@linaro.org Cc: qemu-devel@nongnu.org, yuan1.liu@intel.com, nanhai.zou@intel.com, shameerali.kolothum.thodi@huawei.com Subject: [PATCH v7 2/7] migration/multifd: put IOV initialization into compression method Date: Mon, 3 Jun 2024 23:41:01 +0800 Message-ID: <20240603154106.764378-3-yuan1.liu@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240603154106.764378-1-yuan1.liu@intel.com> References: <20240603154106.764378-1-yuan1.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.11; envelope-from=yuan1.liu@intel.com; helo=mgamail.intel.com X-Spam_score_int: -33 X-Spam_score: -3.4 X-Spam_bar: --- X-Spam_report: (-3.4 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_12_24=1.049, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1717507291121100007 Content-Type: text/plain; charset="utf-8" Different compression methods may require different numbers of IOVs. Based on streaming compression of zlib and zstd, all pages will be compressed to a data block, so two IOVs are needed for packet header and compressed data block. Signed-off-by: Yuan Liu Reviewed-by: Nanhai Zou Reviewed-by: Fabiano Rosas Reviewed-by: Peter Xu --- migration/multifd-zlib.c | 7 +++++++ migration/multifd-zstd.c | 8 +++++++- migration/multifd.c | 22 ++++++++++++---------- 3 files changed, 26 insertions(+), 11 deletions(-) diff --git a/migration/multifd-zlib.c b/migration/multifd-zlib.c index 737a9645d2..2ced69487e 100644 --- a/migration/multifd-zlib.c +++ b/migration/multifd-zlib.c @@ -70,6 +70,10 @@ static int zlib_send_setup(MultiFDSendParams *p, Error *= *errp) goto err_free_zbuff; } p->compress_data =3D z; + + /* Needs 2 IOVs, one for packet header and one for compressed data */ + p->iov =3D g_new0(struct iovec, 2); + return 0; =20 err_free_zbuff: @@ -101,6 +105,9 @@ static void zlib_send_cleanup(MultiFDSendParams *p, Err= or **errp) z->buf =3D NULL; g_free(p->compress_data); p->compress_data =3D NULL; + + g_free(p->iov); + p->iov =3D NULL; } =20 /** diff --git a/migration/multifd-zstd.c b/migration/multifd-zstd.c index 256858df0a..ca17b7e310 100644 --- a/migration/multifd-zstd.c +++ b/migration/multifd-zstd.c @@ -52,7 +52,6 @@ static int zstd_send_setup(MultiFDSendParams *p, Error **= errp) struct zstd_data *z =3D g_new0(struct zstd_data, 1); int res; =20 - p->compress_data =3D z; z->zcs =3D ZSTD_createCStream(); if (!z->zcs) { g_free(z); @@ -77,6 +76,10 @@ static int zstd_send_setup(MultiFDSendParams *p, Error *= *errp) error_setg(errp, "multifd %u: out of memory for zbuff", p->id); return -1; } + p->compress_data =3D z; + + /* Needs 2 IOVs, one for packet header and one for compressed data */ + p->iov =3D g_new0(struct iovec, 2); return 0; } =20 @@ -98,6 +101,9 @@ static void zstd_send_cleanup(MultiFDSendParams *p, Erro= r **errp) z->zbuff =3D NULL; g_free(p->compress_data); p->compress_data =3D NULL; + + g_free(p->iov); + p->iov =3D NULL; } =20 /** diff --git a/migration/multifd.c b/migration/multifd.c index f317bff077..d82885fdbb 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -137,6 +137,13 @@ static int nocomp_send_setup(MultiFDSendParams *p, Err= or **errp) p->write_flags |=3D QIO_CHANNEL_WRITE_FLAG_ZERO_COPY; } =20 + if (multifd_use_packets()) { + /* We need one extra place for the packet header */ + p->iov =3D g_new0(struct iovec, p->page_count + 1); + } else { + p->iov =3D g_new0(struct iovec, p->page_count); + } + return 0; } =20 @@ -150,6 +157,8 @@ static int nocomp_send_setup(MultiFDSendParams *p, Erro= r **errp) */ static void nocomp_send_cleanup(MultiFDSendParams *p, Error **errp) { + g_free(p->iov); + p->iov =3D NULL; return; } =20 @@ -228,6 +237,7 @@ static int nocomp_send_prepare(MultiFDSendParams *p, Er= ror **errp) */ static int nocomp_recv_setup(MultiFDRecvParams *p, Error **errp) { + p->iov =3D g_new0(struct iovec, p->page_count); return 0; } =20 @@ -240,6 +250,8 @@ static int nocomp_recv_setup(MultiFDRecvParams *p, Erro= r **errp) */ static void nocomp_recv_cleanup(MultiFDRecvParams *p) { + g_free(p->iov); + p->iov =3D NULL; } =20 /** @@ -783,8 +795,6 @@ static bool multifd_send_cleanup_channel(MultiFDSendPar= ams *p, Error **errp) p->packet_len =3D 0; g_free(p->packet); p->packet =3D NULL; - g_free(p->iov); - p->iov =3D NULL; multifd_send_state->ops->send_cleanup(p, errp); =20 return *errp =3D=3D NULL; @@ -1179,11 +1189,6 @@ bool multifd_send_setup(void) p->packet =3D g_malloc0(p->packet_len); p->packet->magic =3D cpu_to_be32(MULTIFD_MAGIC); p->packet->version =3D cpu_to_be32(MULTIFD_VERSION); - - /* We need one extra place for the packet header */ - p->iov =3D g_new0(struct iovec, page_count + 1); - } else { - p->iov =3D g_new0(struct iovec, page_count); } p->name =3D g_strdup_printf("multifdsend_%d", i); p->page_size =3D qemu_target_page_size(); @@ -1353,8 +1358,6 @@ static void multifd_recv_cleanup_channel(MultiFDRecvP= arams *p) p->packet_len =3D 0; g_free(p->packet); p->packet =3D NULL; - g_free(p->iov); - p->iov =3D NULL; g_free(p->normal); p->normal =3D NULL; g_free(p->zero); @@ -1602,7 +1605,6 @@ int multifd_recv_setup(Error **errp) p->packet =3D g_malloc0(p->packet_len); } p->name =3D g_strdup_printf("multifdrecv_%d", i); - p->iov =3D g_new0(struct iovec, page_count); p->normal =3D g_new0(ram_addr_t, page_count); p->zero =3D g_new0(ram_addr_t, page_count); p->page_count =3D page_count; --=20 2.43.0