similar to: [PATCH 0 of 4] aio event fd support to blktap2

This patch series copies the core of the tapdisk process from blktap2, with updates coming from blktap2.5. Signed-off-by: Thanos Makatos <thanos.makatos@citrix.com>

This patch series introduces the shared ring used by the front-end to pass request descriptors to tapdisk, as well as responses from tapdisk to the front-end. Requests from this ring end up in tapdisk''s standard request queue. When the tapback daemon detects that the front-end tries to connect to the back-end, it spawns a tapdisk and tells it to connect to the shared ring. The shared

Changes: tools/blktap: remove unneeded pointer dereferencing in convert_dev_name_to_num tools/blktap: constify string arrays in convert_dev_name_to_num tools/blktap: fix params and physical-device parsing tools/blktap: remove unneeded pointer dereferencing from img2qcow.c tools/blktap: remove unneeded pointer dereferencing from qcow2raw.c tools/blktap2: fix build errors caused by Werror in

Hi, When I do the "make install-tools" with xen-4.2-unstable, there are some errors about "warn_unused_result". Is it the error in code or the error in the compiling environment? Thank you so much. gcc -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement -D__XEN_TOOLS__ -MMD -MF .tapdisk-queue.o.d

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

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

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

Hi, I''m currently trying xen 4.1.1 with the 3.0.0-rc5 (heard that it now contains the xen code to run as front or back xen domain). Everything seems to run fine, except that I am trying since a few hours to mount a .vhd file in the dom0. What I tried so far: to create a blank vhd file (this is working): host# vhd-util create -n /storage/test.vhd -s 20G Then i try to mount the file

depends on "autoconf: regenerate configure scripts with 4.4 version" This series removes some of the really old deadwood from the tools build and makes some other things which are on their way out configurable at build time with a default depending on how far down the slope I judge them to be. * nuke in tree copy of libaio * nuke obsolete tools: xsview, miniterm, lomount & sv *

hi. trying to understand the idea behind _notify in #define RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(_r, _notify) do { \ RING_IDX __old = (_r)->sring->req_prod; \ RING_IDX __new = (_r)->req_prod_pvt; \ wmb(); /* back sees requests /before/ updated producer index */ \ (_r)->sring->req_prod = __new;

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?

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

Hello List, Merry Christmas to all !! Basically I''m trying to boot a Windows 2008R2 DC HVM with 90GB static max memory and 32GB static min. The node config is Dell M610 with X5660 and 96GB RAM and its running XCP 1.1 Many times the node crashes while booting HVM. Sometimes I get success. I have attached the HVM boot log of successful start. Many times the node hangs as soon as the

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

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

I''m currently working on moving storage services into their own domain and I''ve been looking at blktap2. I''ve been trying to get an image mounted with blktap2 and for some odd reason and tapdisk2 keeps hanging instead of quitting at the end. I haven''t removed any of the storage startup code at this point so everything should be as it normally is in xen-unstable.

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?

I noticed recently that there is no real easy way to get the kernel driver for blktap working in mainline. I''ve pulled down the source from Daniel Stodden''s linux git tree on xensource, but it looks like it''s for debian and I''m running Fedora 14, so I''m trying to sort it out. I run the 3.1.x kernel and don''t want to go back to the 2.6.32 that

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

I''m using the CentOS 6 bundle of xen from http://dev.centos.org/centos/6/xen-c6/ and ran into an issue when creating domains with multiple VHD tap disks. Comparing unstable to the 4.2.1 code I''m using, it seems this issue still applies. I''m using a configuration line that looks something like disk = [