Move xen patchset to new version's subdir.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.xen / xen-configurable-guest-devices

diff --git a/src/patches/suse-2.6.27.31/patches.xen/xen-configurable-guest-devices b/src/patches/suse-2.6.27.31/patches.xen/xen-configurable-guest-devices
new file mode 100644 (file)
index 0000000..c0256c9
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.xen/xen-configurable-guest-devices
@@ -0,0 +1,74 @@
+From: jbeulich@novell.com
+Subject: allow number of guest devices to be configurable
+Patch-mainline: obsolete
+
+... and derive NR_DYNIRQS from this (rather than having a hard-coded
+value).
+Similarly, allow the number of simultaneous transmits in netback to be
+configurable.
+
+--- sle11-2009-03-04.orig/drivers/xen/Kconfig  2009-03-05 15:45:30.000000000 +0100
++++ sle11-2009-03-04/drivers/xen/Kconfig       2008-12-05 16:57:43.000000000 +0100
+@@ -73,6 +73,15 @@ config XEN_NETDEV_BACKEND
+         network devices to other guests via a high-performance shared-memory
+         interface.
+ 
++config XEN_NETDEV_TX_SHIFT
++      int "Maximum simultaneous transmit requests (as a power of 2)"
++      depends on XEN_NETDEV_BACKEND
++      range 5 16
++      default 8
++      help
++        The maximum number transmits the driver can hold pending, expressed
++        as the exponent of a power of 2.
++
+ config XEN_NETDEV_PIPELINED_TRANSMITTER
+       bool "Pipelined transmitter (DANGEROUS)"
+       depends on XEN_NETDEV_BACKEND
+@@ -255,6 +264,16 @@ config XEN_SYSFS
+       help
+         Xen hypervisor attributes will show up under /sys/hypervisor/.
+ 
++config XEN_NR_GUEST_DEVICES
++      int "Number of guest devices"
++      range 0 4032 if 64BIT
++      range 0 960
++      default 256 if XEN_BACKEND
++      default 16
++      help
++        Specify the total number of virtual devices (i.e. both frontend
++        and backend) that you want the kernel to be able to service.
++
+ choice
+       prompt "Xen version compatibility"
+       default XEN_COMPAT_030002_AND_LATER
+--- sle11-2009-03-04.orig/drivers/xen/netback/netback.c        2009-03-05 15:45:30.000000000 +0100
++++ sle11-2009-03-04/drivers/xen/netback/netback.c     2008-12-23 09:35:35.000000000 +0100
+@@ -71,7 +71,7 @@ static DECLARE_TASKLET(net_rx_tasklet, n
+ static struct timer_list net_timer;
+ static struct timer_list netbk_tx_pending_timer;
+ 
+-#define MAX_PENDING_REQS 256
++#define MAX_PENDING_REQS (1U << CONFIG_XEN_NETDEV_TX_SHIFT)
+ 
+ static struct sk_buff_head rx_queue;
+ 
+@@ -1212,6 +1212,7 @@ static void net_tx_action(unsigned long 
+               net_tx_action_dealloc();
+ 
+       mop = tx_map_ops;
++      BUILD_BUG_ON(MAX_SKB_FRAGS >= MAX_PENDING_REQS);
+       while (((NR_PENDING_REQS + MAX_SKB_FRAGS) < MAX_PENDING_REQS) &&
+               !list_empty(&net_schedule_list)) {
+               /* Get a netif from the list with work to do. */
+--- sle11-2009-03-04.orig/include/asm-x86/mach-xen/asm/irq_vectors.h   2009-03-05 15:45:30.000000000 +0100
++++ sle11-2009-03-04/include/asm-x86/mach-xen/asm/irq_vectors.h        2009-03-05 15:45:49.000000000 +0100
+@@ -44,7 +44,7 @@
+ #endif
+ 
+ #define DYNIRQ_BASE           (PIRQ_BASE + NR_PIRQS)
+-#define NR_DYNIRQS            256
++#define NR_DYNIRQS            (64 + CONFIG_XEN_NR_GUEST_DEVICES)
+ 
+ #define NR_IRQS                       (NR_PIRQS + NR_DYNIRQS)
+ #define NR_IRQ_VECTORS                NR_IRQS