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migration: Add an ability to ignore shared RAM blocks

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If ignore-shared capability is set then skip shared RAMBlocks during the
RAM migration.
Also, move qemu_ram_foreach_migratable_block (and rename) to the
migration code, because it requires access to the migration capabilities.

Signed-off-by: Yury Kotov <yury-kotov@yandex-team.ru>
Message-Id: <20190215174548.2630-4-yury-kotov@yandex-team.ru>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Yury Kotov 2019-02-15 20:45:46 +03:00 • committed by Dr. David Alan Gilbert
parent 18269069c3
commit fbd162e629
6 changed files with 94 additions and 54 deletions
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19
exec.c
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@ -3985,25 +3985,6 @@ int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque)
return ret;
}
int qemu_ram_foreach_migratable_block(RAMBlockIterFunc func, void *opaque)
{
RAMBlock *block;
int ret = 0;
rcu_read_lock();
RAMBLOCK_FOREACH(block) {
if (!qemu_ram_is_migratable(block)) {
continue;
}
ret = func(block, opaque);
if (ret) {
break;
}
}
rcu_read_unlock();
return ret;
}
/*
* Unmap pages of memory from start to start+length such that
* they a) read as 0, b) Trigger whatever fault mechanism