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exec: fix ram_list dirty map optimization 

The ae2810c4bb patch introduced
optimization for ram_list.dirty_memory update. However it can only
work correctly if hpratio is 1 as the @bitmap parameter stores 1 bits
per system page size (may vary, 4K or 64K on PPC64) and
ram_list.dirty_memory stores 1 bit per TARGET_PAGE_SIZE
(which is hardcoded to 4K).

This fixes hpratio!=1 case to fall back to the slow path.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2014-01-30 23:03:50 +11:00 committed by Juan Quintela
parent 20bcf73fa8
commit f9ee9f9ac2
1 changed files with 2 additions and 1 deletions
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3
include/exec/ram_addr.h
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@ -93,7 +93,8 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
/* start address is aligned at the start of a word? */
if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
if ((((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) &&
(hpratio == 1)) {
long k;
long nr = BITS_TO_LONGS(pages);