motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-05 00:33:55 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

migration: Add migration_rp_wait|kick()

Browse source 
It's just a simple wrapper for rp_sem on either wait() or kick(), make it
even clearer on how it is used.  Prepared to be used even for other things.

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-ID: <20231004220240.167175-8-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2023-10-04 18:02:37 -04:00 • committed by Juan Quintela
parent 1015ff5476
commit 5e79a4bf03
3 changed files with 34 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

15
migration/migration.h
View file

@ -316,6 +316,12 @@ struct MigrationState {
* be cleared in the rp_thread!
*/
bool rp_thread_created;
/*
* Used to synchronize between migration main thread and return
* path thread. The migration thread can wait() on this sem, while
* other threads (e.g., return path thread) can kick it using a
* post().
*/
QemuSemaphore rp_sem;
/*
* We post to this when we got one PONG from dest. So far it's an
@ -527,4 +533,13 @@ void migration_populate_vfio_info(MigrationInfo *info);
void migration_reset_vfio_bytes_transferred(void);
void postcopy_temp_page_reset(PostcopyTmpPage *tmp_page);
/* Migration thread waiting for return path thread. */
void migration_rp_wait(MigrationState *s);
/*
* Kick the migration thread waiting for return path messages. NOTE: the
* name can be slightly confusing (when read as "kick the rp thread"), just
* to remember the target is always the migration thread.
*/
void migration_rp_kick(MigrationState *s);
#endif