[Xen-changelog] [xen-unstable] [LINUX] Network buffers do not need to be multi-page contiguous

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 4f0bc574455751ed0493f083c13911d8e01b92f0
# Parent  7fba181c853186d90cf703816e30bf610c61a81d
[LINUX] Network buffers do not need to be multi-page contiguous
for unprivileged domains (in any case, can fall back to swiotlb).
On non-privileged domain of Xen/IA64, this caused some trouble.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 linux-2.6-xen-sparse/drivers/xen/core/skbuff.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diff -r 7fba181c8531 -r 4f0bc5744557 
linux-2.6-xen-sparse/drivers/xen/core/skbuff.c
--- a/linux-2.6-xen-sparse/drivers/xen/core/skbuff.c    Thu Jun 15 13:11:31 
2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/core/skbuff.c    Thu Jun 15 13:19:04 
2006 +0100
@@ -121,8 +121,15 @@ static int __init skbuff_init(void)
        for (order = 0; order <= MAX_SKBUFF_ORDER; order++) {
                size = PAGE_SIZE << order;
                sprintf(name[order], "xen-skb-%lu", size);
-               skbuff_order_cachep[order] = kmem_cache_create(
-                       name[order], size, size, 0, skbuff_ctor, skbuff_dtor);
+               if (is_running_on_xen() &&
+                   (xen_start_info->flags & SIF_PRIVILEGED))
+                       skbuff_order_cachep[order] = kmem_cache_create(
+                               name[order], size, size, 0,
+                               skbuff_ctor, skbuff_dtor);
+               else
+                       skbuff_order_cachep[order] = kmem_cache_create(
+                               name[order], size, size, 0, NULL, NULL);
+                       
        }
 
        skbuff_cachep = skbuff_order_cachep[0];

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