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[PATCH RFC 08/14] migration/rdma: Add the function for dynamic page regi
From: |
Zhimin Feng |
Subject: |
[PATCH RFC 08/14] migration/rdma: Add the function for dynamic page registration |
Date: |
Thu, 13 Feb 2020 17:37:49 +0800 |
Add the 'qemu_rdma_registration' function,
multifd send threads call it to register memory.
Signed-off-by: Zhimin Feng <address@hidden>
---
migration/rdma.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
migration/rdma.h | 1 +
2 files changed, 52 insertions(+)
diff --git a/migration/rdma.c b/migration/rdma.c
index 23f7f525f4..19a238be30 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -3471,6 +3471,57 @@ out:
return ret;
}
+/*
+ * Dynamic page registrations for multifd RDMA threads.
+ */
+int qemu_rdma_registration(void *opaque)
+{
+ RDMAContext *rdma = opaque;
+ RDMAControlHeader resp = {.type = RDMA_CONTROL_RAM_BLOCKS_RESULT };
+ RDMALocalBlocks *local = &rdma->local_ram_blocks;
+ int reg_result_idx, i, nb_dest_blocks;
+ RDMAControlHeader head = { .len = 0, .repeat = 1 };
+ int ret = 0;
+
+ head.type = RDMA_CONTROL_RAM_BLOCKS_REQUEST;
+
+ ret = qemu_rdma_exchange_send(rdma, &head, NULL, &resp,
+ ®_result_idx, rdma->pin_all ?
+ qemu_rdma_reg_whole_ram_blocks : NULL);
+ if (ret < 0) {
+ goto out;
+ }
+
+ nb_dest_blocks = resp.len / sizeof(RDMADestBlock);
+
+ if (local->nb_blocks != nb_dest_blocks) {
+ rdma->error_state = -EINVAL;
+ ret = -1;
+ goto out;
+ }
+
+ qemu_rdma_move_header(rdma, reg_result_idx, &resp);
+ memcpy(rdma->dest_blocks,
+ rdma->wr_data[reg_result_idx].control_curr, resp.len);
+
+ for (i = 0; i < nb_dest_blocks; i++) {
+ network_to_dest_block(&rdma->dest_blocks[i]);
+
+ /* We require that the blocks are in the same order */
+ if (rdma->dest_blocks[i].length != local->block[i].length) {
+ rdma->error_state = -EINVAL;
+ ret = -1;
+ goto out;
+ }
+ local->block[i].remote_host_addr =
+ rdma->dest_blocks[i].remote_host_addr;
+ local->block[i].remote_rkey = rdma->dest_blocks[i].remote_rkey;
+ }
+
+out:
+ return ret;
+}
+
/* Destination:
* Called via a ram_control_load_hook during the initial RAM load section which
* lists the RAMBlocks by name. This lets us know the order of the RAMBlocks
diff --git a/migration/rdma.h b/migration/rdma.h
index 8e1a6edf57..86c89bdd1f 100644
--- a/migration/rdma.h
+++ b/migration/rdma.h
@@ -280,6 +280,7 @@ int qemu_rdma_exchange_send(RDMAContext *rdma,
RDMAControlHeader *head,
uint8_t *data, RDMAControlHeader *resp,
int *resp_idx,
int (*callback)(RDMAContext *rdma));
+int qemu_rdma_registration(void *opaque);
void rdma_start_outgoing_migration(void *opaque, const char *host_port,
Error **errp);
--
2.19.1
- Re: [PATCH RFC 03/14] migration/rdma: Create multiFd migration threads, (continued)
- [PATCH RFC 11/14] migration/rdma: use multifd to migrate VM for rdma-pin-all mode, Zhimin Feng, 2020/02/13
- [PATCH RFC 10/14] migration/rdma: Wait for all multifd to complete registration, Zhimin Feng, 2020/02/13
- [PATCH RFC 12/14] migration/rdma: use multifd to migrate VM for NOT rdma-pin-all mode, Zhimin Feng, 2020/02/13
- [PATCH RFC 06/14] migration/rdma: Transmit initial packet, Zhimin Feng, 2020/02/13
- [PATCH RFC 07/14] migration/rdma: Export the 'qemu_rdma_registration_handle' and 'qemu_rdma_exchange_send' functions, Zhimin Feng, 2020/02/13
- [PATCH RFC 05/14] migration/rdma: Create the multifd channels for RDMA, Zhimin Feng, 2020/02/13
- [PATCH RFC 04/14] migration/rdma: Export the RDMAContext struct, Zhimin Feng, 2020/02/13
- [PATCH RFC 09/14] migration/rdma: register memory for multifd RDMA channels, Zhimin Feng, 2020/02/13
- [PATCH RFC 08/14] migration/rdma: Add the function for dynamic page registration,
Zhimin Feng <=
- [PATCH RFC 13/14] migration/rdma: only register the memory for multifd channels, Zhimin Feng, 2020/02/13
- [PATCH RFC 14/14] migration/rdma: RDMA cleanup for multifd migration, Zhimin Feng, 2020/02/13
- Re: [PATCH RFC 00/14] *** multifd for RDMA v2 ***, no-reply, 2020/02/13