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ksm support 

Call MADV_MERGEABLE on guest memory allocations.  MADV_MERGABLE will be
available starting in Linux 2.6.32.  This system call registers a region of
virtual address space with Linux as a candidate for transparent memory
sharing.

Patchworks-ID: 35447
Signed-off-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Izik Eidus 2009-10-08 16:39:39 +02:00 committed by Anthony Liguori
parent de41ac924b
commit ccb167e9d7
1 changed files with 3 additions and 0 deletions
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exec.c
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@ -2412,6 +2412,9 @@ ram_addr_t qemu_ram_alloc(ram_addr_t size)
new_block = qemu_malloc(sizeof(*new_block));
new_block->host = qemu_vmalloc(size);
#ifdef MADV_MERGEABLE
madvise(new_block->host, size, MADV_MERGEABLE);
#endif
new_block->offset = last_ram_offset;
new_block->length = size;