search for: stodden

Displaying 20 results from an estimated 37 matches for "stodden".

2007 Nov 10
3
ring.h notification hold-off question
..._new < req_event (no wraps) would always notify. this somewhere contradicts the statement in ring.h regarding opportunities to customise FINAL_CHECK for for larger-than-one batches. if i''m wrong, then can anybode enlighten me, please? thanks for patience, daniel -- Daniel Stodden LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation Institut für Informatik der TU München D-85748 Garching http://www.lrr.in.tum.de/~stodden mailto:stodden@cs.tum.edu PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B ________________________...
2008 Mar 11
3
Is it possible to make hypercall from user application directly?
Hi, I implemented my own Hypercall in xen. Now I wish my application under dom0 could talk to Xen via my hypercall. Currently, I make a stub in dom0''s kernel, which works as a proxy to forward the request. So, my application first makes a system call to dom0, which then makes hypercall to xen. Is this design necessary? May I call hypercalls from user application under dom0 directly?
2008 Feb 24
7
Using SYSCALL/SYSRET with a minios kernel
Hi, I''m trying to use the SYSCALL/SYSRET opcodes with a minios kernel without much success. Going by the manuals (and linux sources) I first have to setup the STAR and LSTAR registers to define the segment and instruction pointer to be used for SYSCALL: /* * LSTAR and STAR live in a bit strange symbiosis. * They both write to the same internal register. STAR allows
2008 Aug 05
4
Mini-OS and Xen!
Hi I have a doubt regarding Mini-OS and Xen. If it is true that Xen reserves in the virtual address space the top 64MB on 32bit systems and 168MB in PAE systems, doesn''t it exist with a Mini-OS kernel which has only 32MB in size i.e. going by its default config file? Obviously I''m missing something. Regards, Bhaskar. _______________________________________________ Xen-devel
2008 Aug 20
3
Grant Table Hyper Calls For Sharing Memory
I was following an email chain in the xen mailing list on HVM hypercalls on grant tables and the email chain link is below http://lists.xensource.com/archives/html/xen-devel/2007-03/msg00688.html This link says that we need not required hypercalls to share memory b/w HVM''s. But as far as my understanding of sharing memory is concerned, I think the memory is shared using grant table
2010 Jan 28
31
[PATCH 0 of 4] aio event fd support to blktap2
Get blktap2 running on pvops. This mainly adds eventfd support to the userland code. Based on some prior cleanup to tapdisk-queue and the server object. We had most of that in XenServer for a while, so I kept it stacked. 1. Clean up IPC and AIO init in tapdisk-server. [I think tapdisk-ipc in blktap2 is basically obsolete. Pending a later patch to remove it?] 2. Split tapdisk-queue into
2006 Aug 10
1
Gratuitous/unsolicited ARP
...;'ve been grepping around the xen build tree to see whether and where this is covered. haven''t found anything yet. is this covered by linux kernel bridging already, or is it just missing [read: left as a scripting exercise to administrators]? hints welcome. thanks, daniel -- Daniel Stodden LRR - Lehrstuhl für Rechnertechnik und Rechnerorganisation Institut für Informatik der TU München D-85748 Garching http://www.lrr.in.tum.de/~stodden mailto:stodden@cs.tum.edu PGP Fingerprint: F5A4 1575 4C56 E26A 0B33 3D80 457E 82AE B0D8 735B ________________________...
2006 Aug 11
7
How Xen handles Dom1 interrupts?
Good morning, I am new to Xen, and trying to understand how Xen works. I have some questions about virtualization of interrupts on Xen. Thanks in advance for all helps. 1) From papers about Xen architecture found at Xen homepage, Xen seemingly intercepts interrupts of Dom1 (paravirtualization). So interrupts occur in Dom1''s context are sent to Xen, and Xen handles them. Is that correct?
2007 Nov 28
20
Page tables in Xen
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
2012 Mar 26
13
blkback global resources
...per-instance allocations, as the amount of memory taken away from Dom0 for this may be not insignificant when there are many devices. Does anyone have an opinion here, in particular regarding the original authors'' decision to make this global vs. the apparently made observation (by Daniel Stodden, the author of said patch, who I don''t have any current email of to ask directly), but also in the context of multi-page rings, the purpose of which is to allow for larger amounts of in-flight I/O? Thanks, Jan
2011 Jul 20
12
Re: Re: XAPI on debian - sr-create issue
You''re right scout the last line. Out looks like xapi is waiting on tapdisk to plug a key into xenstore. Perhaps a udev rule problem? Perhaps someone who knows more about tapdisk than I well be able to diagnose this tomorrow. Mike Sent from Samsung tablet Sébastien RICCIO <sr@swisscenter.com> wrote: Of course, here it is attached. Last line seems interesting. However tapdisk2
2007 Nov 20
2
netfront/back documentation on wiki
Hi all, I''ve taken a stab at documenting the current interface between netfront and netback drivers, here: http://wiki.xensource.com/xenwiki/XenNetFrontBackInterface Currently, the only way for non-Linux implementers to adhere to this interface is to study the Linux netfront driver, which has a great deal of optimizations and is not meant to be documentation. I''d love it if
2008 Mar 18
2
The return value of xc_map_foreign_range~~~
I am shame to say that I have never met a function whose return value is void*. This is the first time~~~ So, can anyone told me the meaning of the return value of this function -----xc_map_foreign_range? Is it a pointer pointed to a memory area corresponding the machine frame number(the last parameter passed to the function)? And the third parameter named size: the unit of size is in bytes or
2008 Apr 09
1
Hypercall
Hi, I''d like to do some operation every time an hypercall is issued in a domU kernel. I started modifying include/asm-i386/mach-xen/asm/hypercall.h but I don''t think it''s such a great idea, so I think that, as a last chance, I''ll have to substitute all of the hypercall function call with some wrapper function of my own. Can anyone tell me if
2010 Jul 19
17
BLKTAPCTRL[2375]: blktapctrl_linux.c:86: blktap0 open failed
I''m getting this message (subject line) in daemon.log every time I start or restart xend. I''m not sure if this is related to the fact that I cannot boot up my Windows domU from a VHD file. The Windows domU was working fine with Xen 4.0.0 (with 2.6.32.14 dom0 kernel). When I upgraded to Xen 4.0.1-rc4 (with 2.6.32.16 dom0 kernel), I can no long boot the Windows domU from VHD. The
2007 Nov 26
5
xenstored
Hi , Are there any options with xenstored to access xenstore ? Can I look up contents of xenstore ? Thanks, Sanket _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
2007 Nov 26
5
xenstored
Hi , Are there any options with xenstored to access xenstore ? Can I look up contents of xenstore ? Thanks, Sanket _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
2010 Feb 11
6
tapdisk2 segfaults with xen-unstable+linux-2.6-pvops
Hi, I''m trying to run guest pv vm on my machine running xen-unstable (xen-4.0.0-rc3.pre + linux-2.6-pvops). However, I get blktap error: " sudo xm create -c xmexample Using config file "./xmexample". Error: Failed to create device. stdout: unrecognized child response stderr: Check that target "/home/ashish/xen/hd.img" exists and that blktap2 driver
2011 May 02
32
[PATCH] blkback: Fix block I/O latency issue
In blkback driver, after I/O requests are submitted to Dom-0 block I/O subsystem, blkback goes to ''sleep'' effectively without letting blkfront know about it (req_event isn''t set appropriately). Hence blkfront doesn''t notify blkback when it submits a new I/O thus delaying the ''dispatch'' of the new I/O to Dom-0 block I/O subsystem. The new I/O is
2012 Mar 02
0
Fwd: Message Status - Undeliverable (Re: BLKTAP2_IOCTL_CREATE_DEVICE vs. struct blktap2_params' name member)
>>> On 02.03.12 at 10:04, EMEA1.EMEA1-MH.GATEWAY wrote: > The message that you sent was undeliverable to the following: > > jake.wires@citrix.com (550 #5.1.0 Address rejected jake.wires@citrix.com) > daniel.stodden@citrix.com (550 #5.1.0 Address rejected daniel.stodden@citrix.com) > Who is considered the maintainer(s) of blktap2 code these days? Jan