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...s capabilities: smbios-2.6 dmi-2.6 configuration: administrator_password=disabled chassis=notebook family=ThinkPad T420 power-on_password=disabled uuid=01202A76-8A51-CB11-94E8-924CC9AF70CB *-core description: Motherboard product: 4236MBU vendor: LENOVO physical id: 0 version: Not Available serial: 1ZLEH26J1TW slot: Not Available *-cpu description: CPU product: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz vendor: Intel Corp. physical id: 1 bus info: cpu at 0 versi...

Hello, I have a CentOS VM with only one disk on a Xenserver. The disk has 2 partitions: /dev/xvda1 -> /boot /dev/xvda2 -> a physical volume for LVM I added 5GB to this disk via Xencenter to extend /dev/xvda2. Usually I just have to do "pvresize /dev/xvda" to have the additional space added to the disk. But for some reason it does not work for this disk. [root ~]# pvresize /dev/xvda Failed to find physical volum...

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Hi, I looked at the sources and figured out all about the P2M, M2P tables and mappings, Now I''m trying to figure out how dom0 virtual memory is implemented, and I have some questions. The platform I''m working on is x86 with Intel VT enabled. 1. Is dom0 virtual memory managed differently than the other domains? what about hvms? and domUs? 2. What tables are used to manage the

...| > | // assign 'a' to R3, and load M1 into R3 > c := a c(Ry) := a(R3) > > So, the register is necessary for doing the reloading. Yes. But as you show above, it may happen that the same spilled virtual interval is reloaded into _multiple different_ physical registers during its lifetime. So, what is the reason to assign only one (!) physical register to the virtual interval by means of VRM.assignVirt2Phys() and to do it actually in advance? What is the semantics of it? I'd really like to understand it better. How does this solve the problem desc...

I should have added the output of pvs: [root ~]# pvs PV VG Fmt Attr PSize PFree /dev/xvda2 cl_vm731611 lvm2 a-- 9.00g 0 PFree still show 0. It should show 5g. Also: [root ~]# pvdisplay /dev/xvda2 --- Physical volume --- PV Name /dev/xvda2 VG Name cl_vm731611 PV Size 9.00 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 2303 Free PE 0 Allocated PE 2303 PV...

...> > > I faced with situation where libguestfs cannot recognize partitions on a > > disk image which was partitioned on a system with "4K native" sector > > size support. > > > > In order to fix the issue we need to allow users to specify desired > > physical and/or logical block size per drive basis. > > > > It is definitely not a complete patch but rather a way to request for a > > comments. Nevertheless it is already working patch. I've added an > > optional parameters to add_drive API method which allow specifying &gt...

...ion in VirtRegRewriter::rewrite() fail: unsigned VirtReg = MO.getReg(); unsigned PhysReg = VRM->getPhys(VirtReg); ... assert(!MRI->isReserved(PhysReg) && "Reserved register assignment"); Indeed there is a case where PhysReg may be a reserved physical register. Specificially, RegAllocPBQP::finalizeAlloc() may select a physical register thusly: const TargetRegisterClass &RC = *MRI.getRegClass(LI.reg); PReg = RC.getRawAllocationOrder(MF).front(); ... VRM.assignVirt2Phys(LI.reg, PReg); The documentation for TargetRegi...

...: Intel(R) Corporation ID: 73 06 03 00 FF FB EB BF Signature: Type 0, Family 6, Model 55, Stepping 3 Flags: FPU (Floating-point unit on-chip) VME (Virtual mode extension) DE (Debugging extension) PSE (Page size extension) TSC (Time stamp counter) MSR (Model specific registers) PAE (Physical address extension) MCE (Machine check exception) CX8 (CMPXCHG8 instruction supported) APIC (On-chip APIC hardware supported) SEP (Fast system call) MTRR (Memory type range registers) PGE (Page global enable) MCA (Machine check architecture) CMOV (Conditional move instruction suppo...

...uot;RegAllocLinearSpan," and "RegAllocPBQP" there are three indicators for the copy instruction x = copy y. Assume that the value number of x does not equal the value number of y. For "x = copy y", let the boolean values a,b, and c, equal the following: a = x is virtual or physical, b = y is virtual or physical, and c = class(x) == class(y) or class(x) != class(y). The resulting coalescing and actions depend on the truth values of these boolean values. Thus there are 2^3 cases. I expect enumerating and covering the cases provides an exhaustive solution to coalescing. 1. W...

Hi, I got this NOTE on most of the link. But I am not getting reason for this. Why someone should not add physical NIC to virbr0. I tried to add my eth1 to virbr0 and it get added. So whether it affects to some functionality of NAT network? -- Sagar Dilip Shedge, Pune. With Regards.

Hello List, We’re currently managing VMs across approximately 26 physical hosts. We tend to migrate VMs around a lot to do things like spread load and keep VMs running when physical hosts are in need of package updates. Suffice it to say sometimes finding out which physical host a VM is currently running on can be a pain. Anyone know of an open source tool that wi...

Hello, My data is "study.txt": "Not A" "A" "Mathematics" 80 15 "Physics" 32 24 "Biology" 18 29 I want to transform this data into with column names 'course' and 'A': course A 1 Mathematics 1 2 Mathematics 1 .. .........

...into several intervals according to the principle described by you above. Each of this intervals (split children) then gets a stack slot allocated (and all these split intervals get the same stack slot?) and then those new splitted intervals are added to unhandled set. Thus they get a chance to get physical registers assigned to them, independently. So, actually, they are not quite "spilled" intervals (since they are not really spilled and located in memory) and may get a physical register. Is my understanding of the algorithm correct so far? What I don't quite understand is the follo...

...y can be considered an improvement in terms of design and readability regardless of the added capabilities. One can think of it as a zero-cost abstraction layer. The Approach ============ To support platforms that do not have hardware virtual memory managers, we need to introduce the concept of physical memory pages that work as the storage for data that sanitizers currently read and write by virtual addresses. In presence of the concept of physical memory, every time we access virtual memory we have to translate the given virtual address to a physical one. For example, this check: *(u8 *)...

Dear all, When I compared the performance of some application on both a Xen domU and a standard linux machine (where domU runs on a similar physical mahine), I notice the application runs faster on the domU than on the physical machine. Instrumenting the application code shows the application spends more time on popen() calls on domU than on the physical machine. I wonder if xenlinux does some special modification of the popen code to imp...

Hello, On Debian 9 (stretch prerelease) I am able to mount with the following command with root using the following command: mount -t cifs //smb.physics.wisc.edu/smb /smb -osec=krb5,multiuser,username=smbadmin at PHYSICS.WISC.EDU --verbose root can also access files as expected However, when cifs-utils 6.6-5 is installed, a different user cannot access as expected: ls /smb ls: cannot access '/smb': Permission denied But when cif...

Hi, In the context of MachineCode custom inserter, I'm trying to enforce the mapping of virtual register to a physical one. According to the documentation https://llvm.org/docs/CodeGenerator.html#mapping-virtual-registers-to-physical-registers There are two ways: the direct one and the indirect ones. The indirect ones refer VirtRegMap class that I've never found. So I tried the direct one... Mapping virtual...

...ls according to the principle described by you above. Each of > this intervals (split children) then gets a stack slot allocated (and > all these split intervals get the same stack slot?) and then those new > splitted intervals are added to unhandled set. Thus they get a chance > to get physical registers assigned to them, independently. So, > actually, they are not quite "spilled" intervals (since they are not > really spilled and located in memory) and may get a physical register. > Is my understanding of the algorithm correct so far? > > What I don't quite...

I accidentally realized today that any domU''s using the paravirt disk driver potentially suffer from poor performance when they get handed in a physical volume and partitioning is done inside the guest. The physical volume passed in has to be one that has the compat 512 logical sector size but hints its real sector size (eg. 4096) as physical sector size. In dom0 handling is correct and partitions or logical volumes there would be aligned to 4k....