VladPolskiy/qemu
1
0
Fork 0
mirror of https://github.com/qemu/qemu.git synced 2025-08-16 17:37:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

migration: Postcopy preemption preparation on channel creation

Browse Source 
Create a new socket for postcopy to be prepared to send postcopy requested
pages via this specific channel, so as to not get blocked by precopy pages.

A new thread is also created on dest qemu to receive data from this new channel
based on the ram_load_postcopy() routine.

The ram_load_postcopy(POSTCOPY) branch and the thread has not started to
function, and that'll be done in follow up patches.

Cleanup the new sockets on both src/dst QEMUs, meanwhile look after the new
thread too to make sure it'll be recycled properly.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20220707185502.27149-1-peterx@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
  dgilbert: With Peter's fix to quieten compiler warning on
       start_migration
This commit is contained in:
Peter Xu
2022-07-07 14:55:02 -04:00
committed by Dr. David Alan Gilbert
parent ce5b0f4afc
commit 36f62f11e4
10 changed files with 219 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
migration/postcopy-ram.h
View File

@ -183,4 +183,14 @@ int postcopy_wake_shared(struct PostCopyFD *pcfd, uint64_t client_addr,
int postcopy_request_shared_page(struct PostCopyFD *pcfd, RAMBlock *rb,
uint64_t client_addr, uint64_t offset);
/* Hard-code channels for now for postcopy preemption */
enum PostcopyChannels {
RAM_CHANNEL_PRECOPY = 0,
RAM_CHANNEL_POSTCOPY = 1,
RAM_CHANNEL_MAX,
};
bool postcopy_preempt_new_channel(MigrationIncomingState *mis, QEMUFile *file);
int postcopy_preempt_setup(MigrationState *s, Error **errp);
#endif