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[Qemu-block] [PATCH 2/2] block/block-backend.c: remove blk_pread_unthrot
From: |
Manos Pitsidianakis |
Subject: |
[Qemu-block] [PATCH 2/2] block/block-backend.c: remove blk_pread_unthrottled() |
Date: |
Wed, 20 Sep 2017 14:43:10 +0300 |
blk_pread_unthrottled was used to bypass I/O throttling on the BlockBackend in
the case of async I/O. This is not needed anymore and we can just call
blk_pread() directly.
Signed-off-by: Manos Pitsidianakis <address@hidden>
---
include/sysemu/block-backend.h | 2 --
block/block-backend.c | 16 ----------------
hw/block/hd-geometry.c | 7 +------
3 files changed, 1 insertion(+), 24 deletions(-)
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index c4e52a5fa3..c881bfdfe4 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -117,8 +117,6 @@ char *blk_get_attached_dev_id(BlockBackend *blk);
BlockBackend *blk_by_dev(void *dev);
BlockBackend *blk_by_qdev_id(const char *id, Error **errp);
void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, void *opaque);
-int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
- int bytes);
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
unsigned int bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
diff --git a/block/block-backend.c b/block/block-backend.c
index 110a52d5b1..83329fce15 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -1145,22 +1145,6 @@ static int blk_prw(BlockBackend *blk, int64_t offset,
uint8_t *buf,
return rwco.ret;
}
-int blk_pread_unthrottled(BlockBackend *blk, int64_t offset, uint8_t *buf,
- int count)
-{
- int ret;
-
- ret = blk_check_byte_request(blk, offset, count);
- if (ret < 0) {
- return ret;
- }
-
- blk_root_drained_begin(blk->root);
- ret = blk_pread(blk, offset, buf, count);
- blk_root_drained_end(blk->root);
- return ret;
-}
-
int blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
int bytes, BdrvRequestFlags flags)
{
diff --git a/hw/block/hd-geometry.c b/hw/block/hd-geometry.c
index 57ad5012a7..211307f73f 100644
--- a/hw/block/hd-geometry.c
+++ b/hw/block/hd-geometry.c
@@ -62,12 +62,7 @@ static int guess_disk_lchs(BlockBackend *blk,
blk_get_geometry(blk, &nb_sectors);
- /**
- * The function will be invoked during startup not only in sync I/O mode,
- * but also in async I/O mode. So the I/O throttling function has to
- * be disabled temporarily here, not permanently.
- */
- if (blk_pread_unthrottled(blk, 0, buf, BDRV_SECTOR_SIZE) < 0) {
+ if (blk_pread(blk, 0, buf, BDRV_SECTOR_SIZE) < 0) {
return -1;
}
/* test msdos magic */
--
2.11.0