From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40740) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fcuaw-00035k-Uv for qemu-devel@nongnu.org; Tue, 10 Jul 2018 11:30:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fcuau-0003Jz-V4 for qemu-devel@nongnu.org; Tue, 10 Jul 2018 11:30:26 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:38412 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fcuat-0003H7-LY for qemu-devel@nongnu.org; Tue, 10 Jul 2018 11:30:24 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 43C7B7C6A9 for ; Tue, 10 Jul 2018 15:30:23 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" Date: Tue, 10 Jul 2018 16:30:04 +0100 Message-Id: <20180710153016.131258-4-dgilbert@redhat.com> In-Reply-To: <20180710153016.131258-1-dgilbert@redhat.com> References: <20180710153016.131258-1-dgilbert@redhat.com> Subject: [Qemu-devel] [PULL 03/15] migration: unbreak postcopy recovery List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, peterx@redhat.com, quintela@redhat.com From: Peter Xu The whole postcopy recovery logic was accidentally broken. We need to fix it in two steps. This is the first step that we should do the recovery when needed. It was bypassed before after commit 36c2f8be2c. Introduce postcopy_try_recovery() helper for the postcopy recovery logic. Call it both in migration_fd_process_incoming() and migration_ioc_process_incoming(). Fixes: 36c2f8be2c ("migration: Delay start of migration main routines") Signed-off-by: Peter Xu Message-Id: <20180627132246.5576-4-peterx@redhat.com> Reviewed-by: Juan Quintela Signed-off-by: Dr. David Alan Gilbert --- migration/migration.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index aea6fb7444..eb3e09e899 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -466,7 +466,8 @@ void migration_incoming_process(void) qemu_coroutine_enter(co); } -void migration_fd_process_incoming(QEMUFile *f) +/* Returns true if recovered from a paused migration, otherwise false */ +static bool postcopy_try_recover(QEMUFile *f) { MigrationIncomingState *mis = migration_incoming_get_current(); @@ -491,11 +492,20 @@ void migration_fd_process_incoming(QEMUFile *f) * that source is ready to reply to page requests. */ qemu_sem_post(&mis->postcopy_pause_sem_dst); - } else { - /* New incoming migration */ - migration_incoming_setup(f); - migration_incoming_process(); + return true; + } + + return false; +} + +void migration_fd_process_incoming(QEMUFile *f) +{ + if (postcopy_try_recover(f)) { + return; } + + migration_incoming_setup(f); + migration_incoming_process(); } void migration_ioc_process_incoming(QIOChannel *ioc) @@ -504,6 +514,9 @@ void migration_ioc_process_incoming(QIOChannel *ioc) if (!mis->from_src_file) { QEMUFile *f = qemu_fopen_channel_input(ioc); + if (postcopy_try_recover(f)) { + return; + } migration_incoming_setup(f); return; } -- 2.17.1