[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PATCH 1.8 4/6] block/iscsi: set bdi->cluster_size
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCH 1.8 4/6] block/iscsi: set bdi->cluster_size |
Date: |
Mon, 25 Nov 2013 14:57:18 +0100 |
this patch aims to set bdi->cluster_size to the internal page size
of the iscsi target so that enabled callers can align requests
properly.
Signed-off-by: Peter Lieven <address@hidden>
---
block/iscsi.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/block/iscsi.c b/block/iscsi.c
index 93fee6d..75d6b87 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -1580,6 +1580,13 @@ static int iscsi_get_info(BlockDriverState *bs,
BlockDriverInfo *bdi)
IscsiLun *iscsilun = bs->opaque;
bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz;
bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws;
+ /* Guess the internal cluster (page) size of the iscsi target by the means
+ * of opt_unmap_gran. Transfer the unmap granularity only if it has a
+ * reasonable size for bdi->cluster_size */
+ if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 &&
+ iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 *
1024) {
+ bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size;
+ }
return 0;
}
--
1.7.9.5
- [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, (continued)
- [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Peter Lieven, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Paolo Bonzini, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Peter Lieven, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Peter Lieven, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Paolo Bonzini, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Peter Lieven, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Paolo Bonzini, 2013/11/25
- Re: [Qemu-devel] [PATCH 1.8 3/6] qemu-img: add option to specify alternate iobuffer size, Peter Lieven, 2013/11/25
[Qemu-devel] [PATCH 1.8 2/6] qemu-img: fix usage instruction for qemu-img convert, Peter Lieven, 2013/11/25
[Qemu-devel] [PATCH 1.8 1/6] qemu-img: add support for skipping zeroes in input during convert, Peter Lieven, 2013/11/25
[Qemu-devel] [PATCH 1.8 4/6] block/iscsi: set bdi->cluster_size,
Peter Lieven <=
[Qemu-devel] [PATCH 1.8 6/6] qemu-img: add option to show progress in sectors, Peter Lieven, 2013/11/25
[Qemu-devel] [PATCH 1.8 5/6] qemu-img: add option to align writes to cluster_sectors during convert, Peter Lieven, 2013/11/25
Re: [Qemu-devel] [PATCH 1.8 5/6] qemu-img: add option to align writes to cluster_sectors during convert, Peter Lieven, 2013/11/25