[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL for-2.1 08/11] block: block: introduce APIs for submi
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL for-2.1 08/11] block: block: introduce APIs for submitting IO as a batch |
Date: |
Mon, 7 Jul 2014 14:28:35 +0200 |
From: Ming Lei <address@hidden>
This patch introduces three APIs so that following
patches can support queuing I/O requests and submitting them
as a batch for improving I/O performance.
Reviewed-by: Paolo Bonzini <address@hidden>
Signed-off-by: Ming Lei <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
block.c | 31 +++++++++++++++++++++++++++++++
include/block/block.h | 4 ++++
include/block/block_int.h | 5 +++++
3 files changed, 40 insertions(+)
diff --git a/block.c b/block.c
index f80e2b2..8800a6b 100644
--- a/block.c
+++ b/block.c
@@ -1905,6 +1905,7 @@ void bdrv_drain_all(void)
bool bs_busy;
aio_context_acquire(aio_context);
+ bdrv_flush_io_queue(bs);
bdrv_start_throttled_reqs(bs);
bs_busy = bdrv_requests_pending(bs);
bs_busy |= aio_poll(aio_context, bs_busy);
@@ -5782,3 +5783,33 @@ BlockDriverState *check_to_replace_node(const char
*node_name, Error **errp)
return to_replace_bs;
}
+
+void bdrv_io_plug(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_io_plug) {
+ drv->bdrv_io_plug(bs);
+ } else if (bs->file) {
+ bdrv_io_plug(bs->file);
+ }
+}
+
+void bdrv_io_unplug(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_io_unplug) {
+ drv->bdrv_io_unplug(bs);
+ } else if (bs->file) {
+ bdrv_io_unplug(bs->file);
+ }
+}
+
+void bdrv_flush_io_queue(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ if (drv && drv->bdrv_flush_io_queue) {
+ drv->bdrv_flush_io_queue(bs);
+ } else if (bs->file) {
+ bdrv_flush_io_queue(bs->file);
+ }
+}
diff --git a/include/block/block.h b/include/block/block.h
index baecc26..32d3676 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -584,4 +584,8 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs);
*/
void bdrv_set_aio_context(BlockDriverState *bs, AioContext *new_context);
+void bdrv_io_plug(BlockDriverState *bs);
+void bdrv_io_unplug(BlockDriverState *bs);
+void bdrv_flush_io_queue(BlockDriverState *bs);
+
#endif
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8f8e65e..f6c3bef 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -261,6 +261,11 @@ struct BlockDriver {
void (*bdrv_attach_aio_context)(BlockDriverState *bs,
AioContext *new_context);
+ /* io queue for linux-aio */
+ void (*bdrv_io_plug)(BlockDriverState *bs);
+ void (*bdrv_io_unplug)(BlockDriverState *bs);
+ void (*bdrv_flush_io_queue)(BlockDriverState *bs);
+
QLIST_ENTRY(BlockDriver) list;
};
--
1.9.3
- [Qemu-devel] [PULL for-2.1 00/11] Block patches, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 01/11] Fix nocow typos in manpage, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 04/11] ahci.c: mask unused flags when reading size PRDT DBC, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 02/11] mirror: Fix qiov size for short requests, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 03/11] MAINTAINERS: add Stefan Hajnoczi to IDE maintainers, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 05/11] qemu-iotests: Disable Quorum testing in 041 when Quorum is not builtin, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 06/11] raw-posix: Fix raw_getlength() to always return -errno on error, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 07/11] ahci: map memory via device's address space instead of address_space_memory, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 08/11] block: block: introduce APIs for submitting IO as a batch,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL for-2.1 09/11] linux-aio: implement io plug, unplug and flush io queue, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 10/11] dataplane: submit I/O as a batch, Stefan Hajnoczi, 2014/07/07
- [Qemu-devel] [PULL for-2.1 11/11] qmp: show QOM properties in device-list-properties, Stefan Hajnoczi, 2014/07/07
- Re: [Qemu-devel] [PULL for-2.1 00/11] Block patches, Peter Maydell, 2014/07/07