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David Vrabel 98dd166ea3 x86/xen/p2m: hint at the last populated P2M entry 
With commit 633d6f17cd (x86/xen: prepare
p2m list for memory hotplug) the P2M may be sized to accomdate a much
larger amount of memory than the domain currently has.

When saving a domain, the toolstack must scan all the P2M looking for
populated pages.  This results in a performance regression due to the
unnecessary scanning.

Instead of reporting (via shared_info) the maximum possible size of
the P2M, hint at the last PFN which might be populated.  This hint is
increased as new leaves are added to the P2M (in the expectation that
they will be used for populated entries).

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: <stable@vger.kernel.org> # 4.0+
 		2015-10-06 13:54:20 +01:00
..
Kconfig xen: features and fixes for 4.3-rc0 2015-09-08 11:46:48 -07:00
Makefile xen/PMU: Initialization code for Xen PMU 2015-08-20 12:25:20 +01:00
apic.c xen/PMU: Intercept PMU-related MSR and APIC accesses 2015-08-20 12:25:25 +01:00
debugfs.c debugfs: Add support to print u32 array in debugfs 2012-04-17 00:18:36 -04:00
debugfs.h debugfs: Add support to print u32 array in debugfs 2012-04-17 00:18:36 -04:00
efi.c xen/efi: Directly include needed headers 2014-09-23 13:36:20 +00:00
enlighten.c x86/xen: Support kexec/kdump in HVM guests by doing a soft reset 2015-09-28 14:48:52 +01:00
grant-table.c x86/xen: use vmap() to map grant table pages in PVH guests 2014-08-11 11:59:35 +01:00
irq.c asmlinkage, x86: Add explicit __visible to arch/x86/* 2014-05-05 16:07:44 -07:00
mmu.c xen/privcmd: Further s/MFN/GFN/ clean-up 2015-09-08 18:03:54 +01:00
mmu.h xen: make a pile of mmu pvop functions static 2011-05-20 14:25:24 -07:00
multicalls.c x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
multicalls.h xen: use this_cpu_xxx replace percpu_xxx funcs 2012-01-24 12:20:24 -05:00
p2m.c x86/xen/p2m: hint at the last populated P2M entry 2015-10-06 13:54:20 +01:00
pci-swiotlb-xen.c pci-swiotlb-xen: call pci_request_acs only ifdef CONFIG_PCI 2013-11-08 15:21:44 -05:00
platform-pci-unplug.c x86/xen: fix non-ANSI declaration of xen_has_pv_devices() 2015-08-20 12:24:13 +01:00
pmu.c xen/PMU: PMU emulation code 2015-08-20 12:25:26 +01:00
pmu.h xen/PMU: Intercept PMU-related MSR and APIC accesses 2015-08-20 12:25:25 +01:00
setup.c x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map 2015-09-28 18:03:38 +01:00
smp.c xen: Use correctly the Xen memory terminologies 2015-09-08 18:03:49 +01:00
smp.h x86/xen: Set EFER.NX and EFER.SCE in PVH guests 2014-10-06 10:27:47 +01:00
spinlock.c locking/pvqspinlock: Rename QUEUED_SPINLOCK to QUEUED_SPINLOCKS 2015-05-11 09:52:09 +02:00
suspend.c xen/PMU: Initialization code for Xen PMU 2015-08-20 12:25:20 +01:00
time.c x86/xen/time: Migrate to new set-state interface 2015-07-30 21:25:38 +02:00
trace.c xen: use generated hypervisor symbols in arch/x86/xen/trace.c 2015-03-16 14:49:13 +00:00
vdso.h
…
vga.c xen/vga: add the xen EFI video mode support 2012-09-24 09:28:57 -04:00
xen-asm.S xen: correctly check for pending events when restoring irq flags 2012-04-27 16:04:21 -04:00
xen-asm.h xen: make direct versions of irq_enable/disable/save/restore to common code 2009-02-04 16:59:04 -08:00
xen-asm_32.S x86/xen: Fix 32-bit PV guests's usage of kernel_stack 2014-04-15 15:00:14 +01:00
xen-asm_64.S x86/asm/entry: Untangle 'system_call' into two entry points: entry_SYSCALL_64 and entry_INT80_32 2015-06-08 09:14:21 +02:00
xen-head.S xen: eliminate scalability issues from initial mapping setup 2015-08-20 12:24:18 +01:00
xen-ops.h xen: move p2m list if conflicting with e820 map 2015-08-20 12:24:24 +01:00