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[Qemu-devel] [RFC 3/4] block: drop duplicated slice extension code
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [RFC 3/4] block: drop duplicated slice extension code |
Date: |
Thu, 21 Mar 2013 15:49:58 +0100 |
The current slice is extended when an I/O request exceeds the limit.
There is no need to extend the slice every time we check a request.
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
block.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/block.c b/block.c
index 712f544..fed3b4d 100644
--- a/block.c
+++ b/block.c
@@ -3766,10 +3766,7 @@ static bool bdrv_exceed_io_limits(BlockDriverState *bs,
int nb_sectors,
int bps_ret, iops_ret;
now = qemu_get_clock_ns(vm_clock);
- if ((bs->slice_start < now)
- && (bs->slice_end > now)) {
- bs->slice_end = now + BLOCK_IO_SLICE_TIME;
- } else {
+ if (now > bs->slice_end) {
bs->slice_start = now;
bs->slice_end = now + BLOCK_IO_SLICE_TIME;
memset(&bs->slice_submitted, 0, sizeof(bs->slice_submitted));
--
1.8.1.4