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From: Consul <void@aleksoft.net>
Date: Fri, 20 Feb 2009 09:14:15 -0800
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Subject: [Qemu-devel] Re: [PATCH] SIGSEGV when USE_KQEMU is defined
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To: qemu-devel@nongnu.org

Consul wrote:
> Signed-off-by: Alex Ivanov <void@aleksoft.net>
> 
> $ svn diff
> Index: block.c
> ===================================================================
> --- block.c     (revision 6628)
> +++ block.c     (working copy)
> @@ -1263,7 +1263,7 @@
>      if (!s->is_write) {
>          qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size);
>      }
> -    qemu_free(s->bounce);
> +    qemu_vfree(s->bounce);
>      s->this_aiocb->cb(s->this_aiocb->opaque, ret);
>      qemu_aio_release(s->this_aiocb);
>  }
> 

On Windows s->bounce = qemu_memalign(512, nb_sectors * 512);
translates to VirtualAlloc and should be freed with VirtualFree (what qemu_vfree does).