search for: p2mt

...steal_for_cache && p2m_is_ram(t) ) { struct page_info *page; 2) fix the race between POD and xenpaging situation can be described as the follow xenpaging POD mfn = gfn_to_mfn() mfn = gfn_to_mfn() check p2m type check p2mt p2m_lock change p2m type p2m_unlock add to pod list p2m_lock() change p2m type p2m_unlock put_page() the result is a page is added to the pod list,and then it''s...

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

The following two patches are about how to speed up in xenpaging when page in pages. On suse11-64 with 4G memory,if we page out 2G pages,it will cost about 15.5 seconds, but take 2088 seconds to finish paging in.If page-in costs too much time,it will cause unmesurable problems when vm or dom0 access the paged_out page,such as BSOD,crash. What鈥檚 more,the dom0 is always in high I/O pressure.

...77881 -28800 # Node ID 68eae0b487aef8349f168518f56264ce61afb0a1 # Parent 9f4640e40d4f31563885427a5a8d9eae2e110514 xenpaging:add the dealing of MEM_EVENT_FLAG_EVICT_FAIL request in tools/xenpaging If a page is nominated but not evicted,then dom0 accesses the page,it will change the page''s p2mt to be p2m_ram_paging_in,and the req.flags is MEM_EVENT_FLAG_EVICT_FAIL;so it will fail in p2m_mem_paging_evict() because of the p2mt;and paging->num_paged_out will not increase in this case;After the paging process is terminated, the p2mt p2m_ram_paging_in still remains in p2m table.Once domU ac...

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.

The following two patches allow the parallel use of memsharing, xenpaging and xen-access by using an independent ring buffer for each feature. Please review. v2: - update mem_event_check_ring arguments, check domain rather than domain_id - check ring_full first because its value was just evaluated - check if ring buffer is initialized before calling mem_access_domctl/mem_paging_domctl

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 conceptually independent, so they can each

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

ging_prep ensures that an mfn is backing the paged-out gfn, and transitions to the next state in the paging state machine for this page. Foreign mappings of the gfn will now succeed. This is the key idea, as it allows the pager to now map the gfn and fill in its contents. Unfortunately, it also allows any other foreign mapper to map the gfn and read its contents. This is particularly dangerous

...6 16:27:50 2010 -0500 +++ b/xenalyze.c Fri May 07 16:22:10 2010 -0700 @@ -4382,8 +4382,8 @@ if ( opt.dump_all ) printf(" %s npf gpa %llx q %x mfn %llx t %d\n", h->dump_header, - r->gpa, r->qualification, - r->mfn, r->p2mt); + (unsigned long long)r->gpa, r->qualification, + (unsigned long long)r->mfn, r->p2mt); } void hvm_generic_postprocess(struct hvm_data *h) @@ -5741,7 +5741,7 @@ case 2: if(sizeof(r->gpl2) != ri->extra_words * 4) { -...

-- 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

...+/* Translate a VA to an MFN, injecting a page-fault if we fail */ +#define BAD_GVA_TO_GFN (~0UL) +#define BAD_GFN_TO_MFN (~1UL) +#define READONLY_GFN (~2UL) +static mfn_t emulate_gva_to_mfn( + struct vcpu *v, + unsigned long vaddr) +{ + unsigned long gfn; + mfn_t mfn; + p2m_type_t p2mt; + uint32_t pfec = PFEC_page_present | PFEC_write_access; + + /* Translate the VA to a GFN */ + gfn = paging_gva_to_gfn(v, vaddr, &pfec); + if ( gfn == INVALID_GFN ) + { + hvm_inject_exception(TRAP_page_fault, pfec, vaddr); + return _mfn(BAD_GVA_TO_GFN); + } + +...

I ran a bisect to find out when Windows XP 32 bit becomes unusably slow. And I found the changeset that caused it. ========== The problem: ========== Windows 8 64 bit and 32 bit run fast and fine in the newest xen versions. Windows XP 32 bit runs unusably slow in anything new that I built from xen-unstable, but runs fast in 4.1.2 and 4.1.3 stable. While it is running slow, "xm top" or

...will be freed below after the ept flush */ + * the intermediate tables will be freed below after the ept flush + * + * Read-then-write is OK because we hold the p2m lock. */ old_entry = *ept_entry; if ( mfn_valid(mfn_x(mfn)) || direct_mmio || p2m_is_paged(p2mt) || @@ -390,10 +392,10 @@ new_entry.access = p2ma; new_entry.rsvd2_snp = (iommu_enabled && iommu_snoop); - if ( new_entry.mfn == mfn_x(mfn) ) + new_entry.mfn = mfn_x(mfn); + + if ( old_entry.mfn == new_entry.mfn )...

...s hypercall is failing > > in your case? > > > Hi, > > I continue to invesgate this bug and find hypercall_mmu_update in > qemu_remap_bucket(xc_map_foreign_bulk) is failing: > > do_mmu_update > ->mod_l1_entry > -> if ( !p2m_is_ram(p2mt) || unlikely(mfn == INVALID_MFN) ) > return -EINVAL; > > mfn==INVALID_MFN, because : > > mod_l1_entry > ->gfn_to_mfn(p2m_get_hostp2m(pg_dom), l1e_get_pfn(nl1e), &p2mt)); > ->p2m->get_entry >...

Dear All: I am pretty new to xen-devel, please correct me in the following. Assume we have the following terms GPT: guest page table SPT: shadow page table (Question a) When guest OS is running, is it always using SPT for address translation? If it is the case, how does guest OS refer and modify its own GPT content? It seems that there is a page table entry in SPT for the GPT page. (Question

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

From: Zhang Xiantao <xiantao.zhang@intel.com> With virtual EPT support, L1 hyerpvisor can use EPT hardware for L2 guest''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):

Patrick, there following patches fix xenpaging for me. Granttable handling is incomplete. If a page is gone, a GNTST_eagain should be returned to the caller to inidcate the hypercall has to be retried after a while, until the page is available again. Please review. Olaf _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

...o avoid case 2. During the paging nomination, if the access tag of page is detected, paging should skip selecting this page. The pseudo-code of step 3 can be written as follow: int p2m_mem_paging_nominate(struct domain *d, unsigned long gfn) { mfn = gfn_to_mfn_noreference(d, gfn, &p2mt); -----> avoid saving timestamp and access tag if ( !mfn_valid(mfn) ) goto out; clear_access_tag(); ----------> clear the access tag of this page if (test_page_hot()) goto out; ------> if the page is accessed recently, go to out ........