From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35019) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fDpJf-0006vg-4q for qemu-devel@nongnu.org; Wed, 02 May 2018 06:48:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fDpJe-00034a-AK for qemu-devel@nongnu.org; Wed, 02 May 2018 06:48:55 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:42622 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 1fDpJe-00034L-4N for qemu-devel@nongnu.org; Wed, 02 May 2018 06:48:54 -0400 From: Peter Xu Date: Wed, 2 May 2018 18:47:33 +0800 Message-Id: <20180502104740.12123-18-peterx@redhat.com> In-Reply-To: <20180502104740.12123-1-peterx@redhat.com> References: <20180502104740.12123-1-peterx@redhat.com> Subject: [Qemu-devel] [PATCH v8 17/24] migration: setup ramstate for resume List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alexey Perevalov , "Daniel P . Berrange" , Juan Quintela , Andrea Arcangeli , "Dr . David Alan Gilbert" , peterx@redhat.com After we updated the dirty bitmaps of ramblocks, we also need to update the critical fields in RAMState to make sure it is ready for a resume. Signed-off-by: Peter Xu --- migration/ram.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- migration/trace-events | 1 + 2 files changed, 45 insertions(+), 1 deletion(-) diff --git a/migration/ram.c b/migration/ram.c index 118460109b..2821e15cc2 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2291,6 +2291,41 @@ static int ram_init_all(RAMState **rsp) return 0; } +static void ram_state_resume_prepare(RAMState *rs, QEMUFile *out) +{ + RAMBlock *block; + uint64_t pages = 0; + + /* + * Postcopy is not using xbzrle/compression, so no need for that. + * Also, since source are already halted, we don't need to care + * about dirty page logging as well. + */ + + RAMBLOCK_FOREACH(block) { + pages += bitmap_count_one(block->bmap, + block->used_length >> TARGET_PAGE_BITS); + } + + /* This may not be aligned with current bitmaps. Recalculate. */ + rs->migration_dirty_pages = pages; + + rs->last_seen_block = NULL; + rs->last_sent_block = NULL; + rs->last_page = 0; + rs->last_version = ram_list.version; + /* + * Disable the bulk stage, otherwise we'll resend the whole RAM no + * matter what we have sent. + */ + rs->ram_bulk_stage = false; + + /* Update RAMState cache of output QEMUFile */ + rs->f = out; + + trace_ram_state_resume_prepare(pages); +} + /* * Each of ram_save_setup, ram_save_iterate and ram_save_complete has * long-running RCU critical section. When rcu-reclaims in the code @@ -3286,8 +3321,16 @@ out: static int ram_resume_prepare(MigrationState *s, void *opaque) { RAMState *rs = *(RAMState **)opaque; + int ret; - return ram_dirty_bitmap_sync_all(s, rs); + ret = ram_dirty_bitmap_sync_all(s, rs); + if (ret) { + return ret; + } + + ram_state_resume_prepare(rs, s->to_dst_file); + + return 0; } static SaveVMHandlers savevm_ram_handlers = { diff --git a/migration/trace-events b/migration/trace-events index 53243e17ec..46c5ca1dba 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -88,6 +88,7 @@ ram_dirty_bitmap_reload_complete(char *str) "%s" ram_dirty_bitmap_sync_start(void) "" ram_dirty_bitmap_sync_wait(void) "" ram_dirty_bitmap_sync_complete(void) "" +ram_state_resume_prepare(uint64_t v) "%ld" # migration/migration.c await_return_path_close_on_source_close(void) "" -- 2.14.3