From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47555) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f4jBd-00051p-KJ for qemu-devel@nongnu.org; Sat, 07 Apr 2018 04:27:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f4jBa-00029e-HD for qemu-devel@nongnu.org; Sat, 07 Apr 2018 04:27:01 -0400 Received: from mail-pf0-x242.google.com ([2607:f8b0:400e:c00::242]:37125) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1f4jBa-00029J-CQ for qemu-devel@nongnu.org; Sat, 07 Apr 2018 04:26:58 -0400 Received: by mail-pf0-x242.google.com with SMTP id x16so2379399pfm.4 for ; Sat, 07 Apr 2018 01:26:58 -0700 (PDT) From: Lidong Chen Date: Sat, 7 Apr 2018 16:26:34 +0800 Message-Id: <1523089594-1422-6-git-send-email-lidongchen@tencent.com> In-Reply-To: <1523089594-1422-1-git-send-email-lidongchen@tencent.com> References: <1523089594-1422-1-git-send-email-lidongchen@tencent.com> Subject: [Qemu-devel] [PATCH 5/5] migration: disable RDMA WRITR after postcopy started. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: quintela@redhat.com, dgilbert@redhat.com Cc: qemu-devel@nongnu.org, adido@mellanox.com, licq@mellanox.com, Lidong Chen RDMA write operations are performed with no notification to the destination qemu, then the destination qemu can not wakeup. So disable RDMA WRITE after postcopy started. Signed-off-by: Lidong Chen --- migration/qemu-file.c | 3 ++- migration/rdma.c | 12 ++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 8acb574..a64ac3a 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -260,7 +260,8 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset, int ret = f->hooks->save_page(f, f->opaque, block_offset, offset, size, bytes_sent); f->bytes_xfer += size; - if (ret != RAM_SAVE_CONTROL_DELAYED) { + if (ret != RAM_SAVE_CONTROL_DELAYED && + ret != RAM_SAVE_CONTROL_NOT_SUPP) { if (bytes_sent && *bytes_sent > 0) { qemu_update_position(f, *bytes_sent); } else if (ret < 0) { diff --git a/migration/rdma.c b/migration/rdma.c index 81be482..8529ddd 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2964,6 +2964,10 @@ static size_t qemu_rdma_save_page(QEMUFile *f, void *opaque, CHECK_ERROR_STATE(); + if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { + return RAM_SAVE_CONTROL_NOT_SUPP; + } + qemu_fflush(f); if (size > 0) { @@ -3528,6 +3532,10 @@ static int qemu_rdma_registration_start(QEMUFile *f, void *opaque, CHECK_ERROR_STATE(); + if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { + return 0; + } + trace_qemu_rdma_registration_start(flags); qemu_put_be64(f, RAM_SAVE_FLAG_HOOK); qemu_fflush(f); @@ -3550,6 +3558,10 @@ static int qemu_rdma_registration_stop(QEMUFile *f, void *opaque, CHECK_ERROR_STATE(); + if (migrate_get_current()->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { + return 0; + } + qemu_fflush(f); ret = qemu_rdma_drain_cq(f, rdma); -- 1.8.3.1