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Re: [Qemu-devel] [PATCH 07/13] migration: create ram_multifd_page
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [PATCH 07/13] migration: create ram_multifd_page |
Date: |
Mon, 23 Jan 2017 18:13:29 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
"Dr. David Alan Gilbert" <address@hidden> wrote:
> * Juan Quintela (address@hidden) wrote:
>> The function still don't use multifd, but we have simplified
>> ram_save_page, xbzrle and RDMA stuff is gone. We have added a new
>> counter and a new flag for this type of pages.
>>
>> Signed-off-by: Juan Quintela <address@hidden>
>> +static int ram_multifd_page(QEMUFile *f, PageSearchStatus *pss,
>> + bool last_stage, uint64_t *bytes_transferred)
>> +{
>> + int pages;
>> + uint8_t *p;
>> + RAMBlock *block = pss->block;
>> + ram_addr_t offset = pss->offset;
>> +
>> + p = block->host + offset;
>> +
>> + if (block == last_sent_block) {
>> + offset |= RAM_SAVE_FLAG_CONTINUE;
>> + }
>> + pages = save_zero_page(f, block, offset, p, bytes_transferred);
>> + if (pages == -1) {
>> + *bytes_transferred +=
>> + save_page_header(f, block, offset | RAM_SAVE_FLAG_MULTIFD_PAGE);
>> + qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
>> + *bytes_transferred += TARGET_PAGE_SIZE;
>> + pages = 1;
>> + acct_info.norm_pages++;
>> + acct_info.multifd_pages++;
>
> The acct_info is now updated simultaneously from multiple
> threads?
No. This is still done from the migration thread.
Later, Juan.
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