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Hello, I''ve recently setup a Linux Dom0 with a 3.0.17 kernel and Xen 4.1.2, and since the 3.x series doesn''t have blktap support I''m using qdisk to attach raw images. I''ve been playing with small images, something like 1GB, and everything seemed fine, speed was not fantastic but it was ok. Today I''ve set up a bigger machine, with a 20GB raw hdd and the disk write throughput is really slow, inferior to 0.5MB/s. I''m...

...ver, the guest OS still sees the CD inserted] $ xl block-list a0 Segmentation fault $ xl cd-insert a0 hdc file:/images/xs-tools-6.0.0.iso Segmentation fault The problem seems to be that xl cd-eject is writing corrupt values to xenstore. Note that vbd/1/5632 is still there as when it booted, but qdisk/1/5632 has some random stuff in it $ xenstore-ls -f /local/domain/0/backend /local/domain/0/backend/qdisk = "" /local/domain/0/backend/qdisk/1 = "" /local/domain/0/backend/qdisk/1/768 = "" /local/domain/0/backend/qdisk/1/768/frontend = "/local/domain/1/device/vbd...

...; (r0) /local/domain/0/name = "Domain-0" (r0) /local/domain/0/device-model = "" (r0) /local/domain/0/device-model/2 = "" (r0) /local/domain/0/device-model/2/state = "running" (r0) /local/domain/0/backend = "" (r0) /local/domain/0/backend/qdisk = "" (r0) /local/domain/0/backend/qdisk/2 = "" (r0) /local/domain/0/backend/qdisk/2/51714 = "" (n0,r2) /local/domain/0/backend/qdisk/2/51714/frontend = "/local/domain/2/device/vbd/51714" (n0,r2) /local/domain/0/backend/qdisk/2/51714/params = "aio...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2013-4375 / XSA-71 version 2 qemu disk backend (qdisk) resource leak UPDATES IN VERSION 2 ==================== Public release Fix patch header corruption in xsa71-qemu-xen-unstable.patch. ISSUE DESCRIPTION ================= The qdisk PV disk backend in the qemu-xen flavour of qemu ("upstream qemu") can be influenced by a malicious front...

...tate on the domU side. DomU kernel output: http://bpaste.net/show/63482/ xen logs: http://bpaste.net/show/63490/ udevadm monitor output: http://bpaste.net/show/63481/ I can work around this issue easily by creating a loop back device for the iso file first and using that instead. I suspect that qdisk should handle this situation, but I''m not sure how to troubleshoot this.

Are there any tools like iptraf or top to display tc stats? I would like to see things like flowes(TCP or UDP connections) as well as simple per second stats. I''m trying to monitor my p2p uploads and network connections to see if things are getting into the right class. I used to use mrtg for this, with some perl scripts I wrote. This project of mine has long since bitrotten.

Hi, List, I''m trying xl create a pv guest with qcow/qcow2 image, it always fails at libxl_device_disk_local_attach. #xl create pv_config_file libxl: error: libxl.c:1119:libxl_device_disk_local_attach: cannot locally attach a qdisk image if the format is not raw libxl: error: libxl_create.c:467:do_domain_create: failed to run bootloader: -3 disk configuration is: disk=[ ''tap:qcow2:/var/lib/xen/images/sles11pv/disk0.qcow2,xvda,w'', ] Is there any way to make it work? Thanks, ________________________________...

Hello! I was asking for help on the Freenode channel, and I was pointed here. I have a situation where, using xl, I can create a functional PV domU, with or without pv-grub, but I cannot access the console. Firing up xend and using xm works without trouble. Since xend and company is being deprecated, I would like to transition to using the xl toolstack. The system is an Arch Linux system

Hi all, I’m running Xen 4.1 on a couple of NetBSD dom0s and NetBSD’s pkgsrc provides both the xl and xm tools for working with Xen 4.1. I understand that xl is the new way of doing things, but I can’t get it to create my guests the way I want and the main symptom of this is that the text console isn’t available. When I create a guest with xl it starts up qemu-dm (which xm doesn’t do) and I get

From: Stefano Stabellini <stefano.stabellini@eu.citrix.com> When disk is a cdrom and the drive is empty the "params" node in xenstore might be missing completely: cope with it instead of segfaulting. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> --- hw/xen_disk.c | 16 +++++++++++----- 1 files changed, 11 insertions(+), 5 deletions(-) diff --git

...0x2001003760, stack: 0x100000 "main" Shutting down () Shutdown requested: 3 Thread "shutdown" exited. INFO[VTPM]: Starting vTPM manager domain INFO[VTPM]: Option: Using tpm_tis driver ******************* BLKFRONT for device/vbd/768 ********** backend at /local/domain/0/backend/qdisk/4/768 Failed to read /local/domain/0/backend/qdisk/4/768/feature-barrier. 32768 sectors of 512 bytes ************************** blk_open(device/vbd/768) -> 3 ============= Init TPM BACK ================ Thread "tpmback-listener": pointer: 0x20010043f0, stack: 0xf0000 ============= Init...

Package: xen-utils-common Version: 4.4.1-6 Severity: normal Dear Maintainer, (There appear to be several reports on the BTS with concerns relating to this report. Some unarchiving/merging may be necessary. Reassignment may be needed as well since I'm not sure which package this problem would fall under. Ultimately decided to file with xen-utils-common with 'xl' being the frontend

...all! Just a reminder, the CentOS Virt SIG meeting is tomorrow, 2pm, on #centos-devel (freenode IRC). Agenda items I've got: * Xen 4.4.1 for C6 update (finally) - Got xen 4.4.1 w/ updated XenServer blktap working, + libvirt - Other changes to consider: xend off by default, revert "favor qdisk" change * oVirt joining SIG? * Meetings over Christmas - proposal: Cancel phone meeting 29 Dec; do regular IRC meeting on 12 January Anything else? -George

...ince when we are using the m2p_override it is not true anymore that the mmap''ed area doesn''t have corresponsing struct pages. Removing the VM_PFNMAP flag makes get_user_pages work on the mmap''ed user vma. An example test case would be using a Xen userspace block backend (QDISK) on a file on NFS using O_DIRECT. The patch should be backported back to 2.6.38. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> --- drivers/xen/gntdev.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev...

...0x2001003760, stack: 0x100000 "main" Shutting down () Shutdown requested: 3 Thread "shutdown" exited. INFO[VTPM]: Starting vTPM manager domain INFO[VTPM]: Option: Using tpm_tis driver ******************* BLKFRONT for device/vbd/768 ********** backend at /local/domain/0/backend/qdisk/1/768 Failed to read /local/domain/0/backend/qdisk/1/768/feature-barrier. 32768 sectors of 512 bytes ************************** blk_open(device/vbd/768) -> 3 ============= Init TPM BACK ================ Thread "tpmback-listener": pointer: 0x20010043f0, stack: 0xf0000 ============= Init...

...0x2001003760, stack: 0x100000 "main" Shutting down () Shutdown requested: 3 Thread "shutdown" exited. INFO[VTPM]: Starting vTPM manager domain INFO[VTPM]: Option: Using tpm_tis driver ******************* BLKFRONT for device/vbd/768 ********** backend at /local/domain/0/backend/qdisk/1/768 Failed to read /local/domain/0/backend/qdisk/1/768/feature-barrier. 32768 sectors of 512 bytes ************************** blk_open(device/vbd/768) -> 3 ============= Init TPM BACK ================ Thread "tpmback-listener": pointer: 0x20010043f0, stack: 0xf0000 ============= Init...

...lt;memballoon model='xen'/> >>    </devices> >> </domain> >> >> The virtual guest starts, but then sits in the Grub 2 boot prompt >> because the disk is not available. The qemu log shows: >> >> qemu-system-i386: failed to create 'qdisk' device '51712': failed to >> create drive: Could not open >> 'rbd:guests/mytwotel-a:id=libvirt:key=AQCAUpBbrcaiFxAA1sztXPbkdW1L54i99oUpyA==:auth_supported=cephx\;none': >> No such file or directory >> qemu-system-i386: failed to create 'qdisk'...

...n mainly windows domUs are used is XENDOMAINS_CREATE_USLEEP that I setted to 30 or 40 seconds on my systems to decrease the "overload" caused by windows startup (even if pv drivers are installed). The better performance of upstream qemu (in particular heavy disks performance increase with qdisk instead of blktap2) have minimized the problem but is still present starting 3-4 windows domUs or more. -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 4297 bytes Desc: Firma crittografica S/MIME URL: <http://...

The time has come for another round of stable releases. Please send (or resend) any outstanding backport requests for 4.0.4 and 4.1.3 before Friday 20 April. Note that 4.0.4 will likely be the last release in the 4.0.x branch. Ian.

...5 kernel code we were using before has totally bitrotted. I see three ways forward: 1. Try to do a "deep port" of the functionality, continuing to maintain it going forward. 2. Start using the blktap3 code, which requires no kernel driver. 3. Drop blktap support, and ask people to use qdisk for vhd. Re #1, I'm not really excited about the idea of trying to keep porting those patches forward (and finding and fixing bugs in the forward-port each time). Re #2, this would require getting the blktap3 stuff working upstream and then backporting it. #3 would be by far the easiest. In...