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From 4130035f29158309e86b3a1e0f25dbd5bec81af0 Mon Sep 17 00:00:00 2001
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From: Juan Quintela <quintela@redhat.com>
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Date: Tue, 14 Jan 2014 15:07:38 +0100
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Subject: [PATCH 27/40] memory: cpu_physical_memory_clear_dirty_range() now uses bitmap operations
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RH-Author: Juan Quintela <quintela@redhat.com>
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Message-id: <1389712071-23303-28-git-send-email-quintela@redhat.com>
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Patchwork-id: 56685
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O-Subject: [RHEL7 qemu-kvm PATCH 27/40] memory: cpu_physical_memory_clear_dirty_range() now uses bitmap operations
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Bugzilla: 997559
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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RH-Acked-by: Dr. David Alan Gilbert (git) <dgilbert@redhat.com>
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We were clearing a range of bits, so use bitmap_clear().
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Signed-off-by: Juan Quintela <quintela@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Orit Wasserman <owasserm@redhat.com>
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(cherry picked from commit a461e389f489e72cdc770ff887512c2c9109bc43)
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Signed-off-by: Juan Quintela <quintela@trasno.org>
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---
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include/exec/memory-internal.h | 10 ++++------
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1 file changed, 4 insertions(+), 6 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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include/exec/memory-internal.h | 10 ++++------
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1 files changed, 4 insertions(+), 6 deletions(-)
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diff --git a/include/exec/memory-internal.h b/include/exec/memory-internal.h
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index 9d32a5a..94bd6af 100644
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--- a/include/exec/memory-internal.h
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+++ b/include/exec/memory-internal.h
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@@ -104,14 +104,12 @@ static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
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ram_addr_t length,
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unsigned client)
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{
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- ram_addr_t addr, end;
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+ unsigned long end, page;
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assert(client < DIRTY_MEMORY_NUM);
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- end = TARGET_PAGE_ALIGN(start + length);
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- start &= TARGET_PAGE_MASK;
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- for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
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- clear_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
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- }
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+ end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
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+ page = start >> TARGET_PAGE_BITS;
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+ bitmap_clear(ram_list.dirty_memory[client], page, end - page);
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}
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void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
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--
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1.7.1
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