similar to: [PATCH] x86: minor adjustment to asm constraint in get_page()

Hi, I sent the following e-mail to kexec-mailing list (kexec@lists.infradead.org) since subjects of makedumpfile are discussed on the mailing list. I want to inform this to xen developers since I think this function is useful for xen developers. Thanks. Itsuro Oda (see https://sourceforge.net/projects/makedumpfile/ about makedumpfile command.) Forwarded by Itsuro ODA

Hi, Olaf we have tested the xenpaging feature and found some problems. (1) the test case like this : when we start a VM with POD enable, the xenpaging is started at the same time. this case will cause many problems ,finally, we fixed the BUG, the patch is attached below. (2) there is a very serious problem. we have observed many VM crash examples, the error code is not always the same.

Signed-off-by: Kieran Mansley <kmansley@solarflare.com> Allow iomem permissions to be set up through grant table ops diff -r 749b60ccc177 xen/arch/x86/mm.c --- a/xen/arch/x86/mm.c Wed Jul 25 14:03:08 2007 +0100 +++ b/xen/arch/x86/mm.c Wed Jul 25 14:03:12 2007 +0100 @@ -594,6 +594,14 @@ get_##level##_linear_pagetable( return 1; \ } + +int iomem_page_test(unsigned long mfn,

With pretty trivial user mode programs being able to crash the kernel due to the ref counter widths in Xen being more narrow than in Linux, I started an attempt to put together a kernel side fix. While addressing the plain hypercalls is pretty strait forward, dealing with multicalls (both when using them for lazy mmu mode batching and when explicitly using them in e.g. netback - the backends are

In testing our implementation of the hypervisor copy based backend- >frontend networking changes, we see what I believe are spurious warning messages during the shutdown of the frontend domain: (XEN) /export/build/schuster/xvm-gate/xen.hg/xen/include/asm/mm.h: 189:d0 Error pfn 30e290: rd=ffff830000fcf100, od=ffff830000fcf100, caf=00000000, taf=0000000000000000 (XEN) Xen call trace:

With the lake of iommu, dom0 must have a 1:1 memory mapping for all these guest physical address. When the ballon decides to give back a page to the kernel, this page must have the same address as previously. Otherwise, we will loose the 1:1 mapping and will break DMA-capable device. Signed-off-by: Julien Grall <julien.grall@linaro.org> CC: Keir Fraser <keir@xen.org> CC: Jan Beulich

(resent without HTML) On 07/14/2013 05:56 AM, Ramkumar Ramachandra wrote: > 1c54d77 (x86: partial unification of asm-x86/bitops.h, 2008-01-30) > changed a bunch of btrl/btsl instructions to btr/bts, with the following > justification: > > The inline assembly for the bit operations has been changed to remove > explicit sizing hints on the instructions, so the assembler will

This is the latest version of a patch that adds hugepage support to the Xen hypervisor in a PV environment. It is against the latest xen-unstable tree on xenbits.xensource.com. I believe this version addresses the comments made about the previous version of the patch. Hugepage support must be enabled via the hypervisor command line option "allowhugepage". It assumes the guest

Revert the following commits: - 5bdcd510c2ac9efaf55c4cbd8d46421d8e2320cd ("x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs") - d5a581d84ae6b8a4a740464b80d8d9cf1e7947b2 ("x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs") - 0474d5d9d2f7f3b11262f7bf87d0e7314ead9200. ("x86/extable: Macrofy inline assembly

Revert the following commits: - 5bdcd510c2ac9efaf55c4cbd8d46421d8e2320cd ("x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs") - d5a581d84ae6b8a4a740464b80d8d9cf1e7947b2 ("x86/cpufeature: Macrofy inline assembly code to work around GCC inlining bugs") - 0474d5d9d2f7f3b11262f7bf87d0e7314ead9200. ("x86/extable: Macrofy inline assembly

1c54d77 (x86: partial unification of asm-x86/bitops.h, 2008-01-30) changed a bunch of btrl/btsl instructions to btr/bts, with the following justification: The inline assembly for the bit operations has been changed to remove explicit sizing hints on the instructions, so the assembler will pick the appropriate instruction forms depending on the architecture and the context. Unfortunately,

This is a fourth cut of the hypervisor patch of the proposed XENMEM_claim_pages hypercall/subop, taking into account feedback from Jan and Keir and IanC, plus some fixes found via runtime debugging (using privcmd only) and some added comments/cleanup. [Logistical note: I will be out tomorrow (Friday) plus US holidays next week so my responsiveness to comments may be slower for awhile. --djm]

Hi all, I had posted about MCA support for Intel64 before. It had only a function to log the MCA error data received from hypervisor. http://lists.xensource.com/archives/html/xen-devel/2008-09/msg00876.html I attach patches that support not only error logging but also Page Offlining function. The page where an MCA occurs will offline and not reuse. A new flag ''PGC_reserved''

This patch adds a per-node bucket to the heap structure in Xen. During heap initialization the patch determines which bucket to place the memory. We reserve guard pages between node boundaries in the case that said boundary isn''t already guarded by the MAX_ORDER boundary to prevent the buddy allocator from merging pages between nodes. -- Ryan Harper Software Engineer; Linux Technology

On 07/14/2013 12:23 PM, Jeremy Fitzhardinge wrote: > (resent without HTML) > > On 07/14/2013 05:56 AM, Ramkumar Ramachandra wrote: >> 1c54d77 (x86: partial unification of asm-x86/bitops.h, 2008-01-30) >> changed a bunch of btrl/btsl instructions to btr/bts, with the following >> justification: >> >> The inline assembly for the bit operations has been

__map_domain_page() *must* be matched with an unmap_domain_page(). These five static inline functions each map a page (or two), then throw away the context needed to unmap it. Each of the changes are limited to their respective functions. In two cases, this involved replacing a large amount of pointer arithmetic with memcpy() (all callers were relying on memcpy() semantics of positive/negative

Hi, all I want to reduce the checkpoint size of a VM by memory exclusion. I try to find out all the free pages by reference count at VMM-level, As they declared that: /* Page is on a free list: ((count_info & PGC_count_mask) == 0). */ , in struct page_info which is defined in /xen/include/asm-x86/mm.h, but unfortunately, all the pages in a idle VM accords with this condition.

With the x86 instruction emulator no pretty complete, I''d like to re-submit this patch to support cmpxchg16b on x86-64 and at once rename the underlying emulator callback function pointer (making clear that if implemented, it is to operate on two longs rather than two 32-bit values). At the same time it fixes an apparently wrong emulator context initialization in the shadow code.

The virtio-net driver currently uses netdev_alloc_frag() for GFP_ATOMIC mergeable rx buffer allocations. This commit migrates virtio-net to use per-receive queue page frags for GFP_ATOMIC allocation. This change unifies mergeable rx buffer memory allocation, which now will use skb_refill_frag() for both atomic and GFP-WAIT buffer allocations. To address fragmentation concerns, if after buffer

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