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migration/ram: Reduce unnecessary rate limiting
When the host page is a huge page and something is sent in the current iteration, migration_rate_limit() should be executed. If not, it can be omitted. Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com> Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com> Reviewed-by: David Edmondson <david.edmondson@oracle.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20210316125716.1243-2-jiangkunkun@huawei.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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migration
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@ -2035,8 +2035,13 @@ static int ram_save_host_page(RAMState *rs, PageSearchStatus *pss,
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pages += tmppages;
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pages += tmppages;
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pss->page++;
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pss->page++;
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/* Allow rate limiting to happen in the middle of huge pages */
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/*
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migration_rate_limit();
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* Allow rate limiting to happen in the middle of huge pages if
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* something is sent in the current iteration.
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*/
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if (pagesize_bits > 1 && tmppages > 0) {
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migration_rate_limit();
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}
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} while ((pss->page & (pagesize_bits - 1)) &&
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} while ((pss->page & (pagesize_bits - 1)) &&
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offset_in_ramblock(pss->block,
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offset_in_ramblock(pss->block,
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((ram_addr_t)pss->page) << TARGET_PAGE_BITS));
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((ram_addr_t)pss->page) << TARGET_PAGE_BITS));
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