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[Qemu-devel] [PATCH v16 12/14] migration: Wait for blocking IO
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH v16 12/14] migration: Wait for blocking IO |
Date: |
Tue, 26 Jun 2018 20:19:30 +0200 |
We have three conditions here:
- channel fails -> error
- we have to quit: we close the channel and reads fails
- normal read that success, we are in bussiness
So forget the complications of waiting in a semaphore.
Signed-off-by: Juan Quintela <address@hidden>
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
---
migration/ram.c | 13 -------------
1 file changed, 13 deletions(-)
diff --git a/migration/ram.c b/migration/ram.c
index b9c8f65059..5d38d699f3 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -602,8 +602,6 @@ typedef struct {
bool running;
/* should this thread finish */
bool quit;
- /* thread has work to do */
- bool pending_job;
/* array of pages to receive */
MultiFDPages_t *pages;
/* packet allocated len */
@@ -1199,14 +1197,6 @@ static void multifd_recv_sync_main(void)
for (i = 0; i < migrate_multifd_channels(); i++) {
MultiFDRecvParams *p = &multifd_recv_state->params[i];
- trace_multifd_recv_sync_main_signal(p->id);
- qemu_mutex_lock(&p->mutex);
- p->pending_job = true;
- qemu_mutex_unlock(&p->mutex);
- }
- for (i = 0; i < migrate_multifd_channels(); i++) {
- MultiFDRecvParams *p = &multifd_recv_state->params[i];
-
trace_multifd_recv_sync_main_wait(p->id);
qemu_sem_wait(&multifd_recv_state->sem_sync);
qemu_mutex_lock(&p->mutex);
@@ -1219,7 +1209,6 @@ static void multifd_recv_sync_main(void)
MultiFDRecvParams *p = &multifd_recv_state->params[i];
trace_multifd_recv_sync_main_signal(p->id);
-
qemu_sem_post(&p->sem_sync);
}
trace_multifd_recv_sync_main(multifd_recv_state->packet_num);
@@ -1256,7 +1245,6 @@ static void *multifd_recv_thread(void *opaque)
used = p->pages->used;
flags = p->flags;
trace_multifd_recv(p->id, p->packet_num, used, flags);
- p->pending_job = false;
p->num_packets++;
p->num_pages += used;
qemu_mutex_unlock(&p->mutex);
@@ -1306,7 +1294,6 @@ int multifd_load_setup(void)
qemu_sem_init(&p->sem, 0);
qemu_sem_init(&p->sem_sync, 0);
p->quit = false;
- p->pending_job = false;
p->id = i;
p->pages = multifd_pages_init(page_count);
p->packet_len = sizeof(MultiFDPacket_t)
--
2.17.1
- [Qemu-devel] [PATCH v16 03/14] migration: Calculate mbps only during transfer time, (continued)
- [Qemu-devel] [PATCH v16 03/14] migration: Calculate mbps only during transfer time, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 02/14] migration: Create multifd packet, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 05/14] migration: Add multifd traces for start/end thread, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 06/14] migration: Multifd channels always wait on the sem, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 07/14] migration: Add block where to send/receive packets, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 09/14] migration: Create multifd_bytes ram_counter, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 08/14] migration: Synchronize multifd threads with main thread, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 11/14] migration: Start sending messages, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 12/14] migration: Wait for blocking IO,
Juan Quintela <=
- [Qemu-devel] [PATCH v16 13/14] migration: Remove not needed semaphore and quit, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 10/14] migration: Create ram_save_multifd_page, Juan Quintela, 2018/06/26
- [Qemu-devel] [PATCH v16 14/14] migration: Stop sending whole pages through main channel, Juan Quintela, 2018/06/26