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Rename "QEMU global mutex" to "BQL" in comments and docs

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The term "QEMU global mutex" is identical to the more widely used Big
QEMU Lock ("BQL"). Update the code comments and documentation to use
"BQL" instead of "QEMU global mutex".

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Message-id: 20240102153529.486531-6-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2024-01-02 10:35:29 -05:00
parent a4a411fbaf
commit 0b2675c473
12 changed files with 27 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

8
hw/block/dataplane/virtio-blk.c
View file

@ -84,7 +84,7 @@ apply_vq_mapping(IOThreadVirtQueueMappingList *iothread_vq_mapping_list,
}
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf,
VirtIOBlockDataPlane **dataplane,
Error **errp)
@ -148,7 +148,7 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *conf,
return true;
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
{
VirtIOBlock *vblk;
@ -179,7 +179,7 @@ void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)
g_free(s);
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
int virtio_blk_data_plane_start(VirtIODevice *vdev)
{
VirtIOBlock *vblk = VIRTIO_BLK(vdev);
@ -310,7 +310,7 @@ static void virtio_blk_data_plane_stop_vq_bh(void *opaque)
virtio_queue_host_notifier_read(host_notifier);
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
void virtio_blk_data_plane_stop(VirtIODevice *vdev)
{
VirtIOBlock *vblk = VIRTIO_BLK(vdev);

2
hw/block/virtio-blk.c
View file

@ -1539,7 +1539,7 @@ static void virtio_blk_resize(void *opaque)
VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
/*
* virtio_notify_config() needs to acquire the global mutex,
* virtio_notify_config() needs to acquire the BQL,
* so it can't be called from an iothread. Instead, schedule
* it to be run in the main context BH.
*/

6
hw/scsi/virtio-scsi-dataplane.c
View file

@ -20,7 +20,7 @@
#include "scsi/constants.h"
#include "hw/virtio/virtio-bus.h"
/* Context: QEMU global mutex held */
/* Context: BQL held */
void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp)
{
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
@ -93,7 +93,7 @@ static void virtio_scsi_dataplane_stop_bh(void *opaque)
}
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
int virtio_scsi_dataplane_start(VirtIODevice *vdev)
{
int i;
@ -185,7 +185,7 @@ fail_guest_notifiers:
return -ENOSYS;
}
/* Context: QEMU global mutex held */
/* Context: BQL held */
void virtio_scsi_dataplane_stop(VirtIODevice *vdev)
{
BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));