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[Qemu-devel] [PATCH 1/4] BlockLimits: introduce max_transfer_length
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCH 1/4] BlockLimits: introduce max_transfer_length |
Date: |
Fri, 5 Sep 2014 18:51:25 +0200 |
Signed-off-by: Peter Lieven <address@hidden>
---
block.c | 4 ++++
include/block/block_int.h | 3 +++
2 files changed, 7 insertions(+)
diff --git a/block.c b/block.c
index cb670fd..2c4a5de 100644
--- a/block.c
+++ b/block.c
@@ -529,6 +529,7 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error **errp)
return;
}
bs->bl.opt_transfer_length = bs->file->bl.opt_transfer_length;
+ bs->bl.max_transfer_length = bs->file->bl.max_transfer_length;
bs->bl.opt_mem_alignment = bs->file->bl.opt_mem_alignment;
} else {
bs->bl.opt_mem_alignment = 512;
@@ -543,6 +544,9 @@ void bdrv_refresh_limits(BlockDriverState *bs, Error **errp)
bs->bl.opt_transfer_length =
MAX(bs->bl.opt_transfer_length,
bs->backing_hd->bl.opt_transfer_length);
+ bs->bl.max_transfer_length =
+ MIN(bs->bl.max_transfer_length,
+ bs->backing_hd->bl.max_transfer_length);
bs->bl.opt_mem_alignment =
MAX(bs->bl.opt_mem_alignment,
bs->backing_hd->bl.opt_mem_alignment);
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8a61215..e178782 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -288,6 +288,9 @@ typedef struct BlockLimits {
/* optimal transfer length in sectors */
int opt_transfer_length;
+ /* maximal transfer length in sectors */
+ int max_transfer_length;
+
/* memory alignment so that no bounce buffer is needed */
size_t opt_mem_alignment;
} BlockLimits;
--
1.7.9.5
- [Qemu-devel] [PATCH 0/4] introduce max_transfer_length, Peter Lieven, 2014/09/05
- [Qemu-devel] [PATCH 1/4] BlockLimits: introduce max_transfer_length,
Peter Lieven <=
- [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Peter Lieven, 2014/09/05
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, BenoƮt Canet, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Paolo Bonzini, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Peter Lieven, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Paolo Bonzini, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Peter Lieven, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Paolo Bonzini, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Peter Lieven, 2014/09/08
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Kevin Wolf, 2014/09/23
- Re: [Qemu-devel] [PATCH 2/4] block: immediately cancel oversized read/write requests, Peter Lieven, 2014/09/23