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migration: Do chunk page in postcopy_each_ram_send_discard()

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Right now we loop ramblocks for twice, the 1st time chunk the dirty bits with
huge page information; the 2nd time we send the discard ranges.  That's not
necessary - we can do them in a single loop.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2021-12-07 19:50:13 +08:00 committed by Juan Quintela
parent e3fbf76021
commit f30c2e5ba8
1 changed files with 10 additions and 10 deletions
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20
migration/ram.c
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@ -2454,6 +2454,8 @@ static int postcopy_send_discard_bm_ram(MigrationState *ms, RAMBlock *block)
return 0;
}
static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block);
/**
* postcopy_each_ram_send_discard: discard all RAMBlocks
*
@ -2475,6 +2477,14 @@ static int postcopy_each_ram_send_discard(MigrationState *ms)
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
postcopy_discard_send_init(ms, block->idstr);
/*
* Deal with TPS != HPS and huge pages. It discard any partially sent
* host-page size chunks, mark any partially dirty host-page size
* chunks as all dirty. In this case the host-page is the host-page
* for the particular RAMBlock, i.e. it might be a huge page.
*/
postcopy_chunk_hostpages_pass(ms, block);
/*
* Postcopy sends chunks of bitmap over the wire, but it
* just needs indexes at this point, avoids it having
@ -2575,7 +2585,6 @@ static void postcopy_chunk_hostpages_pass(MigrationState *ms, RAMBlock *block)
int ram_postcopy_send_discard_bitmap(MigrationState *ms)
{
RAMState *rs = ram_state;
RAMBlock *block;
RCU_READ_LOCK_GUARD();
@ -2587,15 +2596,6 @@ int ram_postcopy_send_discard_bitmap(MigrationState *ms)
rs->last_sent_block = NULL;
rs->last_page = 0;
RAMBLOCK_FOREACH_NOT_IGNORED(block) {
/*
* Deal with TPS != HPS and huge pages. It discard any partially sent
* host-page size chunks, mark any partially dirty host-page size
* chunks as all dirty. In this case the host-page is the host-page
* for the particular RAMBlock, i.e. it might be a huge page.
*/
postcopy_chunk_hostpages_pass(ms, block);
}
trace_ram_postcopy_send_discard_bitmap();
return postcopy_each_ram_send_discard(ms);