From: Ben Herrenschmidt <b...@kernel.crashing.org>
If the kernel page size is larger than TARGET_PAGE_SIZE, which
happens for example on ppc64 with kernels compiled for 64K pages,
the dirty tracking doesn't work.
Cc: Avi Kivity <a...@redhat.com>
Cc: Marcelo Tosatti <mtosa...@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
---
kvm-all.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
I've sent this a number of times now, the last couple without comment.
It fixes a real bug, please apply.
diff --git a/kvm-all.c b/kvm-all.c
index ba2cee1..7e44429 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -354,6 +354,7 @@ static int
kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
unsigned long page_number, c;
target_phys_addr_t addr, addr1;
unsigned int len = ((section->size / TARGET_PAGE_SIZE) + HOST_LONG_BITS -
1) / HOST_LONG_BITS;
+ unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE;
/*
* bitmap-traveling is faster than memory-traveling (for addr...)
@@ -365,10 +366,11 @@ static int
kvm_get_dirty_pages_log_range(MemoryRegionSection *section,
do {
j = ffsl(c) - 1;
c &= ~(1ul << j);
- page_number = i * HOST_LONG_BITS + j;
+ page_number = (i * HOST_LONG_BITS + j) * hpratio;
addr1 = page_number * TARGET_PAGE_SIZE;
addr = section->offset_within_region + addr1;
- memory_region_set_dirty(section->mr, addr, TARGET_PAGE_SIZE);
+ memory_region_set_dirty(section->mr, addr,
+ TARGET_PAGE_SIZE * hpratio);
} while (c != 0);
}
}
--
1.7.9.1
