similar to: What code is related to the writable page?

hi, I''m developing my own 32-bit (no PAE) paravirtualized kernel for xen with Mini-OS as a starting point. I am currently working on process page table support (equivalent of arch/i386/mm/pgtable-xen.c) and mostly following Linux for the moment. I noticed that linux-2.6.18-xen never pins an L1 table (a pte), yet __pgd_pin() walks the page directory and gives up write access on the kernel

I want to know any difference between writing, reading and shadow page table (for example performance). I am thankful for any help or resource for that. -- Best Regards Mohamad Taghi Mir Mohamad Rezaie Iran University of Science and Technology Department of Computer Science & Engineering System Software Group _______________________________________________ Xen-devel mailing list

At OLS I gave a talk on some of the Xen scalability inhibitors, and one of these was writable page tables. We went over why the feature does not scale, but just as important, we found that the uniprocessor case does not provide any advantage either. These tests were done on x86_64, so I wanted to run the 1-way test on 32 bit to show the same problem. So, I have run with writable PTs and

In a recent conversation one of my coworkers raised a concern about memory limitations when running 32-bit guests on top of the 64-bit hypervisor. At this point the discussion is academic; I don''t know when/if we''ll ever be able to get system resources to test it, to see if the concerns that he expressed are real. So I decided to post this in hope of getting comments from the

Hi all. I''m now try to read and write puseud physical memory of domU from Dom0 with xenaccess(this is using libxc). #http://xenaccess.sourceforge.net/ With xenaccess, I''m succeeded read and writing almost of the memory. But It fail when I try to access head 1M region and some bit regions. To be precise, xc_map_foreign_range() of libxc returns error code. **

Just installed winxp in HVM under Suse 10.2. Now, I cannot access the CDROM drive even though it worked fine during the installation. Windows exploer show it as D drive, but when I put in a data CDROM, it keeps asking to install cdrom. Device manager shows the CDROM as QEMMU CDROM drive. Any suggestions? Art _______________________________________________ Xen-users mailing list

paging mechanism clarification Hi All, The Xen uses 2 level Paging Mechanism to resolve the Virtual Addresses into frame numbers from domU.The first level is taken care by the MMU for the domU i.e translation from virtual address to the physical address just like normal paging mechanism. The second level of translation is done by the Xen hypervisor.It translates the pseduo physical address

I''m to porting a lightweight kernel to Xen 3.0.4-x86_64 and have run into a problem while setting the PML4. Xen complains that it has a bad type of ''PGT_writable_page'' (e8000001), while it expects 80000000. However, I''m almost certain that this is not the case. I added a routine to do a depth first search of the four page table levels looking for this machine

hi I try to understand the code of xen memory there are gmfn, gpfn and pfn in the xen and in the /xen/include/xen/mm.h there are some explanation about them as follows: * 1. gpfn/gpaddr: A guest-specific pseudo-physical frame number or address. * 2. gmfn/gmaddr: A machine address from the p.o.v. of a particular guest. * 3. mfn/maddr: A real machine frame number or address. * 4.

Dear all; Has anyone tried the new CPU (codename Yonah) produced by Apple? I heard from the engineer of Apple that MacBook Pro is already reachable, although it is not distributed to the public until February. If anyone has some information, I would like to buy it to enlarge the frontier. -- Does Yonah demand xen/i86 or xen/ppc? Or we need brand-new source code? That is the problem. Is

Hello every body. Well, my question is very simple . I Have a HVM working fine ( I hope so ... ) on a CentOS 5.1 , xen 3.1. I created config file by hand .. I''m not using virtmanager from CentOS .. I '' m using LVM dev w/o file system formated. My HDA is configured like this: disk = [ ''phy:/dev/vms_1/win01,hda,w'' ] My question , what is the diference if I

Hi, Which of the Mercurial repos contains Linux kernel sources that were used to build the Xen 3.1 binary distribution? I have this question because I am suspecting that the sata_via driver included in the distribution is not supporting my SATA controller VIA8237x (I get error messages when modprobe''ing it from an init ramdisk). This repo (http://xenbits.xensource.com/linux-2.6-xen.hg)

All, I''m posting to the Xen-devel list and the OSDL fastboot list. There are a number of Xen folks who''ll want to look at the code. For the fastboot folks, this is mostly intended as an announcement of the port. Please limit your replies to the list(s) that they applies to, thanks :-) A number of people have expressed interest in kexec support for Xen guests. In

Hello virtual friends. I''m using Windows HVM on CentOS 5.1, xen 3.1. When I conect VNC to Dom0 IP , I get correct screen, main windows console. But I have a very very poor mouse performance. I tried xensoure 4.1 , and I saw a mouse performance a little bit better than xen 3.1 w / CentOS 5.1. What is me problem, CentOS 5.1 or xen 3.1 , or compilation wrong maked by CentOS people. Why

Hi, I have a question about memory page tables in Xen. As far as I understood, every modification to page table will go through Xen(hypervisor). Is it so that all page tables are actually allocated in Xen(hypervisor) instead of guest OS(domain)? Also, is it the case that Xen(hypervisor) needs to maintain a page table for each process running in every domain? Thanks Haifeng

Dear, I''m looking to get Xen running on a system that (afterwards) seems a bit too new. The board has the Intel G33 chipset with the Intel ICH9 southbridge. This chipset is NOT supported by kernel 2.6.18 which ships with Xen 3.1.2 (and Debian Etch). So the question is: * What version of Xen to install to get going? Should I choose unstable? * What distribution will be the easiest to get

Hi, Anyone knows whether how xenstore interface works on the Windows guest? If it does, how? I just want to send a small amount of data between dom0 and the Windows guest. Thank you. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi All, Can anyone please tell me what does pinning and unpinning of pages mean in XEN? Regards, Sameer _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

Hello, I''m setting up a Xen system since I have diferent choices to create the domU''s partitions: raw partition, lvm, files. I''ve done some tests with hdparm and it all seems to be the same. Can anyone, please, share with me what if the best method. Best regards, Luis _______________________________________________ Xen-users mailing list

Hi All, The interface manual says - grant tables provide a generic mechanism sharing between domains. Subsequent lines suggest mechanism sharing between only unpriviliged domains. Can grant tables be used for this capability based shared memory communication between dom0 and domUs? Thanks ~psr -- pradeep singh rautela "proud to be a TUXedo, BSDemons you are a little late" - me