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This patch series restores the use of superpages when restoring or migrating a VM, while retaining efficient batching of 4k pages when superpages are not appropriate or available. Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

This patch series tidies up a few bits ofthe nested p2m code. The main thing it does is reorganize the locking so that most of the changes to nested p2m tables happen only under the p2m lock, and the nestedp2m lock is only needed to reassign p2m tables to new cr3 values. Changes since v1: - a few minor fixes - more sensible flushing policy in p2m_ge...

...RC I thought this was "hypervisor context". Re-reading the ARM ARM I''m not spotting the bit which made me think this. However I haven''t changed this behaviour here. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> --- NB: compile test only. --- xen/arch/arm/p2m.c | 57 +++++++++++++++++++++++++++++++++++++++++---- xen/arch/arm/setup.c | 2 ++ xen/include/asm-arm/p2m.h | 3 +++ 3 files changed, 58 insertions(+), 4 deletions(-) diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c index 307c6d4..e3dfbd7 100644 --- a/xen/arch/arm/p2m.c ++...

This patch series includes a series of bugs related to p2m, ept, and PoD code which were found as part of our XenServer product testing. Each of these fixes actual bugs, and the 3.4-based version of the patch has been tested thoroughly. (There may be bugs in porting the patches, but most of them are simple enough as to make it unlikely.) Each patch is c...

...est''s memory virtualization. In this way, L2 guest''s performance can be improved sharply. According to our testing, some benchmarks can show > 5x performance gain. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Zhang Xiantao (11): nestedhap: Change hostcr3 and p2m->cr3 to meaningful words nestedhap: Change nested p2m''s walker to vendor-specific nested_ept: Implement guest ept''s walker nested_ept: Add permission check for success case EPT: Make ept data structure or operations neutral nEPT: Try to enable EPT paging for L2 guest....

Populate-on-demand: Check pages being returned by the balloon driver This patch series is the second result of my work last summer on decreasing fragmentation of superpages in a guests'' p2m when using populate-on-demand. This patch series is against 4.1; I''m posting it to get feedback on the viability of getting a ported version of this patch into 4.2. As with the previous series, the patces against 4.1 have been extensively in the XenServer testing framework and have been...

-- Advanced Micro Devices GmbH Sitz: Dornach, Gemeinde Aschheim, Landkreis München Registergericht München, HRB Nr. 43632 WEEE-Reg-Nr: DE 12919551 Geschäftsführer: Alberto Bozzo, Andrew Bowd _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...pages in parallel. Increasing to 128 works well for higher numbers of > vcpus. > > v2: > - Wrapped some long lines > - unsigned int for index, unsigned long for array > > Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> > > diff --git a/xen/arch/x86/mm/p2m-pod.c b/xen/arch/x86/mm/p2m-pod.c > --- a/xen/arch/x86/mm/p2m-pod.c > +++ b/xen/arch/x86/mm/p2m-pod.c > @@ -909,6 +909,27 @@ p2m_pod_emergency_sweep_super(struct p2m > p2m->pod.reclaim_super = i ? i - SUPERPAGE_PAGES : 0; > } > > +/* When populating a new superpage, lo...

Not just dom0. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> --- xen/arch/arm/domain.c | 3 +++ xen/arch/arm/domain_build.c | 3 --- xen/arch/arm/p2m.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c index 5702399..4b38790 100644 --- a/xen/arch/arm/domain.c +++ b/xen/arch/arm/domain.c @@ -201,6 +201,9 @@ int arch_domain_create(struct domain *d, unsigned int domcr_fl...

We would the full P2M top directory from 0->MAX_DOMAIN_PAGES (inclusive). Which meant that if the kernel was compiled with MAX_DOMAIN_PAGES=512 we would try to use the 512th entry. Fortunately for us the p2m_top_index has a check for this: BUG_ON(pfn >= MAX_P2M_PFN); which we hit and saw this: (XEN) domain_cr...

Commit 90805dc (c/s 26387:4056e5a3d815) ("EPT: Make ept data stucture or operations neutral") makes nested p2m tables be unlinked from the host p2m table before their destruction (in p2m_teardown_nestedp2m). However, by this time the host p2m table has already been torn down, leading to a possible race condition where another allocation between the two kinds of table being torn down can lead to a linked lis...

...s memory to its own space , then the memory of DomainU is paged out, when the Domain0 access this memory area, a panic is caused. And I really do not know whether the qemu device can perceive the memory modified by xenpaging? thanks! here is the patch to solve the pod problem 1) fix the p2m_pod_decrease_reservation() function, take care of the paging type --- ./origin/xen/arch/x86/mm/p2m.c 2011-09-05 20:39:30.000000000 +0800 +++ ./b/xen/arch/x86/mm/p2m.c 2011-09-23 23:46:19.000000000 +0800 @@ -675,6 +675,23 @@ BUG_ON(p2md->pod.entry_count < 0); p...

Hi, V6: The only change from V5 is in patch #6: - changed comment to reflect autoxlate - removed a redundant ASSERT - reworked logic a bit so that get_page_from_gfn() is called with NULL for p2m type as before. arm has ASSERT wanting it to be NULL. Tim: patch 4 needs your approval. Daniel: patch 5 needs your approval. These patches implement PVH dom0. Patches 1 and 2 implement changes in and around construct_dom0. Patch 7 adds option to boot a dom0 in PVH mode. The rest support tool st...

Add hypercall (shadow op: enable/disable and clean/peek dirtied page bitmap). It consists of two parts: dirty page detecting and saving. For detecting, we setup the guest p2m''s leaf PTE read-only and whenever the guest tries to write something, permission fault happens and traps into xen. The permission-faulted GPA should be saved for the toolstack (when it wants to see which pages are dirtied). For this purpose, we temporarily save the GPAs into bitmap....

In p2m.c (line 197 and line 550), the code assumes the number of L3 P2M table entries is 8 (under PAE mode). According to Intel and AMD specs, it is 4. Could someone explain this discrepancy? Is it a bug? -Wei _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenso...

In sh_page_fault(), there are some code like following, why we think it is mmio only when paging_vcpu_mode_translate(v)? Thanks Yunhong Jiang /* What mfn is the guest trying to access? */ gfn = guest_l1e_get_gfn(gw.eff_l1e); gmfn = vcpu_gfn_to_mfn(v, gfn); mmio = (is_hvm_domain(d) && paging_vcpu_mode_translate(v) &&

There has been some progress, but still no joy. Definitely not intended for inclusion at this point. Tim, Wei, I added a Xen command line toggle to disable IOMMU and P2M table sharing. Tim, I verified that changes to p2m-pt.c don''t break shadow mode (64bit hypervisor and Win 7 guest). Hongkaixing, I incorporated your suggestion in patch 2, so I should add your Signed-off-by eventually. Please review. Olaf, I do not see errors when mapping pages prior to...

This patch worked on top of paging interface patches posted today. It create common interface for P2M table, which handles guest physical address to machine physical address translation. Tested on the following platforms: 1. AMD SVM boxes * 64-bit Xen: 32-bit WinXP SP2, 32-bit SUSE10, 32-bit SUSE 10 PAE BigSMP, and 64-bit RHEL4 * 32-bit PAE Xen: 32-bit WinXP SP2, 32-bit SUSE10, 32-bit SUSE 10 PA...

And can we make p2m memory allocation from domain heap directly? -Xin _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hi, Sometimes when I mount a disk image, unmount it, and then try to create a domU using the disk image I get the following error: Error: Device 2049 (vbd) could not be connected. Backend device not found. Im using a FC4 image. Here is the config file: kernel = "/boot/vmlinuz-2.6.16-rc3-xenU" memory=256 name=Domain1 vif = [''bridge=xenbr0''] disk = [