From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Kernel bug from 3.0 (was phy disks and vifs timing
	out in DomU)
Date: Thu, 01 Sep 2011 10:34:02 -0700
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To: Ian Campbell <Ian.Campbell@eu.citrix.com>
Cc: Todd Deshane <todd.deshane@xen.org>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, David Vrabel <david.vrabel@citrix.com>, Anthony Wright <anthony@overnetdata.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
List-Id: xen-devel@lists.xenproject.org

On 09/01/2011 08:44 AM, Ian Campbell wrote:
>
> blkback, xenbus_client and the grant table stuff all use it as well and
> AFAICT have the same requirement for syncing.
>
> $ git grep alloc_vm_area 
> arch/x86/include/asm/xen/grant_table.h:#define xen_alloc_vm_area(size)  alloc_vm_area(size)
>
> -- this macro is unused...
>
> arch/x86/xen/grant-table.c:                     xen_alloc_vm_area(PAGE_SIZE * max_nr_gframes);
> drivers/block/xen-blkback/xenbus.c:     blkif->blk_ring_area = alloc_vm_area(PAGE_SIZE);
> drivers/net/xen-netback/netback.c:      vif->tx_comms_area = alloc_vm_area(PAGE_SIZE);
> drivers/net/xen-netback/netback.c:      vif->rx_comms_area = alloc_vm_area(PAGE_SIZE);
> drivers/xen/xenbus/xenbus_client.c:     area = xen_alloc_vm_area(PAGE_SIZE);

Well, 3/5ths unused.

    J