* [Qemu-devel] [PATCH v2] block: fix physical_block_size calculation
@ 2010-06-15 15:52 Christoph Hellwig
2010-06-16 14:57 ` Kevin Wolf
0 siblings, 1 reply; 2+ messages in thread
From: Christoph Hellwig @ 2010-06-15 15:52 UTC (permalink / raw)
To: qemu-devel
Both SCSI and virtio expect the physical block size relative to the
logical block size. So get the factor first before calculating the
log2.
Reported-by: Mike Cao <bcao@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: qemu/block_int.h
===================================================================
--- qemu.orig/block_int.h 2010-06-15 14:29:42.593012221 +0200
+++ qemu/block_int.h 2010-06-15 17:48:55.428255620 +0200
@@ -223,7 +223,9 @@ static inline unsigned int get_physical_
{
unsigned int exp = 0, size;
- for (size = conf->physical_block_size; size > 512; size >>= 1) {
+ for (size = conf->physical_block_size;
+ size > conf->logical_block_size;
+ size >>= 1) {
exp++;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Qemu-devel] [PATCH v2] block: fix physical_block_size calculation
2010-06-15 15:52 [Qemu-devel] [PATCH v2] block: fix physical_block_size calculation Christoph Hellwig
@ 2010-06-16 14:57 ` Kevin Wolf
0 siblings, 0 replies; 2+ messages in thread
From: Kevin Wolf @ 2010-06-16 14:57 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: qemu-devel
Am 15.06.2010 17:52, schrieb Christoph Hellwig:
> Both SCSI and virtio expect the physical block size relative to the
> logical block size. So get the factor first before calculating the
> log2.
>
> Reported-by: Mike Cao <bcao@redhat.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
This one looks better. Fixed whitespace errors and applied to the block
branch.
Kevin
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-06-16 14:57 ` Kevin Wolf
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