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Remove uses of ram.last_offset (aka last_ram_offset)

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We currently need this either to allocate the next ram_addr_t for a
new block, or for total memory to be migrated.  Both of which we can
calculate without need of this to keep us in a contiguous address space.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Alex Williamson 2010-06-25 11:08:38 -06:00 • committed by Anthony Liguori
parent f292787d9a
commit d17b5288d9
3 changed files with 30 additions and 13 deletions
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19
exec.c
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@ -2767,6 +2767,17 @@ static void *file_ram_alloc(ram_addr_t memory, const char *path)
}
#endif
static ram_addr_t find_ram_offset(ram_addr_t size)
{
RAMBlock *block;
ram_addr_t last = 0;
QLIST_FOREACH(block, &ram_list.blocks, next)
last = MAX(last, block->offset + block->length);
return last;
}
ram_addr_t qemu_ram_alloc(ram_addr_t size)
{
RAMBlock *new_block;
@ -2800,18 +2811,16 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
madvise(new_block->host, size, MADV_MERGEABLE);
#endif
}
new_block->offset = ram_list.last_offset;
new_block->offset = find_ram_offset(size);
new_block->length = size;
QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
ram_list.phys_dirty = qemu_realloc(ram_list.phys_dirty,
(ram_list.last_offset + size) >> TARGET_PAGE_BITS);
memset(ram_list.phys_dirty + (ram_list.last_offset >> TARGET_PAGE_BITS),
(new_block->offset + size) >> TARGET_PAGE_BITS);
memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
0xff, size >> TARGET_PAGE_BITS);
ram_list.last_offset += size;
if (kvm_enabled())
kvm_setup_guest_memory(new_block->host, size);