ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

migration/multifd: Stop checking p->quit in multifd_send_thread 

We don't need to check p->quit in the multifd_send_thread() because it
is shadowed by the 'exiting' flag. Ever since that flag was added
p->quit became obsolete as a way to stop the thread.

Since p->quit is set at multifd_send_terminate_threads() under the
p->mutex lock, the thread will only see it once it loops, so 'exiting'
will always be seen first.

Note that setting p->quit at multifd_send_terminate_threads() still
makes sense because we need a way to inform multifd_send_pages() that
the channel has stopped.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231012140651.13122-3-farosas@suse.de>
This commit is contained in:
Fabiano Rosas 2023-10-12 11:06:47 -03:00 committed by Juan Quintela
parent d9cda21303
commit 175e63c982
1 changed files with 0 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
migration/multifd.c
View File

@ -743,9 +743,6 @@ static void *multifd_send_thread(void *opaque)
if (flags & MULTIFD_FLAG_SYNC) {
qemu_sem_post(&p->sem_sync);
}
} else if (p->quit) {
qemu_mutex_unlock(&p->mutex);
break;
} else {
qemu_mutex_unlock(&p->mutex);
/* sometimes there are spurious wakeups */