OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

migration: setup ramstate for resume

Browse Source 
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.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180502104740.12123-18-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2018-05-02 18:47:33 +08:00 committed by Juan Quintela
parent edd090c728
commit 08614f3497
2 changed files with 45 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
migration/ram.c
View File

@ -2491,6 +2491,41 @@ static int ram_init_all(RAMState **rsp)
return 0; 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 * Each of ram_save_setup, ram_save_iterate and ram_save_complete has
* long-running RCU critical section. When rcu-reclaims in the code * long-running RCU critical section. When rcu-reclaims in the code
@ -3486,8 +3521,16 @@ out:
static int ram_resume_prepare(MigrationState *s, void *opaque) static int ram_resume_prepare(MigrationState *s, void *opaque)
{ {
RAMState *rs = *(RAMState **)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 = { static SaveVMHandlers savevm_ram_handlers = {

1
migration/trace-events
View File

@ -88,6 +88,7 @@ ram_dirty_bitmap_reload_complete(char *str) "%s"
ram_dirty_bitmap_sync_start(void) "" ram_dirty_bitmap_sync_start(void) ""
ram_dirty_bitmap_sync_wait(void) "" ram_dirty_bitmap_sync_wait(void) ""
ram_dirty_bitmap_sync_complete(void) "" ram_dirty_bitmap_sync_complete(void) ""
ram_state_resume_prepare(uint64_t v) "%" PRId64
# migration/migration.c # migration/migration.c
await_return_path_close_on_source_close(void) "" await_return_path_close_on_source_close(void) ""