Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Jan Kiszka
On 2011-10-24 19:23, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 07:05:08PM +0200, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 06:10:28PM +0200, Jan Kiszka wrote: On 2011-10-24 18:05, Michael S. Tsirkin wrote: This is what I have in mind: - devices set PBA bit if MSI message

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Avi Kivity
On 10/24/2011 02:06 PM, Jan Kiszka wrote: On 2011-10-24 13:09, Avi Kivity wrote: On 10/24/2011 12:19 PM, Jan Kiszka wrote: With the new feature it may be worthwhile, but I'd like to see the whole thing, with numbers attached. It's not a performance issue, it's a resource limitation

[BUG] qemu-kvm: memory_region_add_subregion_common: Assertion `!subregion-parent' failed.

2011-10-25 Thread Lai Jiangshan
This bug is triggered for my Windows XP guest, but not for my linux guests. The gdb result shows that a vga.vram memoryregion is added twice. libvirt log --- 2011-10-25 16:18:58.117: starting up LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin QEMU_AUDIO_DRV=none

[PATCH 1/1 V6 resent ] qemu-kvm: fix improper nmi emulation

2011-10-25 Thread Lai Jiangshan
Previous discussions: Which approach you prefer to? I need to know the result before wasting too much time to respin the approach. Yes, sorry about the slow and sometimes conflicting feedback. 1) Fix KVM_NMI emulation approach (which is v3 patchset) - It directly

Re: [BUG] qemu-kvm: memory_region_add_subregion_common: Assertion `!subregion-parent' failed.

2011-10-25 Thread Jan Kiszka
On 2011-10-25 11:42, Lai Jiangshan wrote: This bug is triggered for my Windows XP guest, but not for my linux guests. The gdb result shows that a vga.vram memoryregion is added twice. libvirt log --- 2011-10-25 16:18:58.117: starting up LC_ALL=C

[PATCH] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Sasha Levin
Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. Signed-off-by: Sasha Levin levinsasha...@gmail.com --- tools/kvm/include/kvm/kvm-ipc.h |1 + tools/kvm/kvm-ipc.c | 33 +

Re: [PATCH] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Pekka Enberg
On Tue, Oct 25, 2011 at 1:40 PM, Sasha Levin levinsasha...@gmail.com wrote: Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. Signed-off-by: Sasha Levin levinsasha...@gmail.com ---  tools/kvm/include/kvm/kvm-ipc.h |

[ANNOUNCE] kvm-kmod-3.1

2011-10-25 Thread Jan Kiszka
This is the kvm-kmod compat wrapper release based on KVM modules of Linux 3.1 (see [1] for background information). The package is available for download from http://sourceforge.net/projects/kvm/files/kvm-kmod/3.1/kvm-kmod-3.1.tar.bz2/download KVM changes since kvm-kmod-3.0b: - initial version

Re: [PATCH] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Osier Yang
于 2011年10月25日 18:40, Sasha Levin 写道: Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. I tested the patch, the socket is still there. (I'm testing with --sdl, and shutdown the vm window). And the guest starting

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Michael S. Tsirkin
On Tue, Oct 25, 2011 at 09:24:17AM +0200, Jan Kiszka wrote: On 2011-10-24 19:23, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 07:05:08PM +0200, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 06:10:28PM +0200, Jan Kiszka wrote: On 2011-10-24 18:05, Michael S. Tsirkin wrote: This is

Re: [PATCH] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Sasha Levin
On Tue, 2011-10-25 at 13:42 +0300, Pekka Enberg wrote: On Tue, Oct 25, 2011 at 1:40 PM, Sasha Levin levinsasha...@gmail.com wrote: Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. Signed-off-by: Sasha Levin

[PATCH v2] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Sasha Levin
Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. Signed-off-by: Sasha Levin levinsasha...@gmail.com --- tools/kvm/include/kvm/kvm-ipc.h |1 + tools/kvm/kvm-ipc.c | 30 +++---

Re: [PATCH] kvm tools: Add method to stop ipc thread

2011-10-25 Thread Sasha Levin
On Tue, 2011-10-25 at 19:08 +0800, Osier Yang wrote: 于 2011年10月25日 18:40, Sasha Levin 写道: Stop the ipc thread when shutting down the hypervisor. This solves a bug where the .sock files weren't removed upon shutdown. I tested the patch, the socket is still there. (I'm testing with --sdl,

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Jan Kiszka
On 2011-10-25 13:20, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 09:24:17AM +0200, Jan Kiszka wrote: On 2011-10-24 19:23, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 07:05:08PM +0200, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 06:10:28PM +0200, Jan Kiszka wrote: On

[PATCH] kvm tools: Fix SDL exit on window close

2011-10-25 Thread Sasha Levin
We've changed IPC to use sockets instead of signals, but the process of closing the SDL window was still trigerring an exit signal causing an ugly message and not cleaning up after itself. This patch switches that to use the proper method of cleaning up. Reported-by: Osier Yang jy...@redhat.com

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Michael S. Tsirkin
On Tue, Oct 25, 2011 at 01:41:39PM +0200, Jan Kiszka wrote: On 2011-10-25 13:20, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 09:24:17AM +0200, Jan Kiszka wrote: On 2011-10-24 19:23, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 07:05:08PM +0200, Michael S. Tsirkin wrote: On Mon,

[RFC/PATCH] kvm tools, bios: Don't include glibc headers

2011-10-25 Thread Pekka Enberg
We should not include glibc headers from BIOS code which can't rely on glibc at runtime. This patch fixes the following build breakage on 64-bit: CC bios/e820.o In file included from /usr/include/features.h:387:0, from /usr/include/unistd.h:26,

[PATCH 1/2] kvm tools: Kill double slash from kvm__get_dir()

2011-10-25 Thread Pekka Enberg
In preparation for showing kvm__get_dir() path to the user, kill the unnecessary double slash to make the output more readable. Cc: Asias He asias.he...@gmail.com Cc: Cyrill Gorcunov gorcu...@gmail.com Cc: Ingo Molnar mi...@elte.hu Cc: Sasha Levin levinsasha...@gmail.com Signed-off-by: Pekka

[PATCH 2/2] kvm tools: Improve kvm setup info and error messages

2011-10-25 Thread Pekka Enberg
This patch improves the output of 'kvm setup' as follows: [penberg@tux kvm]$ ./kvm setup kvm setup creates a new rootfs under /home/penberg//.kvm-tools/. This can be used later by the '-d' parameter of 'kvm run'. usage: kvm setup [name] [penberg@tux kvm]$ ./kvm setup test-box A

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Jan Kiszka
On 2011-10-25 14:05, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 01:41:39PM +0200, Jan Kiszka wrote: On 2011-10-25 13:20, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 09:24:17AM +0200, Jan Kiszka wrote: On 2011-10-24 19:23, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at

[PATCH] kvm tools: Improve kvm list default output

2011-10-25 Thread Pekka Enberg
This patch changes 'kvm list' default output to look as follows: [penberg@tux kvm]$ ./kvm list PID GUEST 8156 guest-8156 default (not running) test-box (not running) Cc: Asias He asias.he...@gmail.com Cc: Cyrill Gorcunov gorcu...@gmail.com Cc: Ingo Molnar mi...@elte.hu

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Kevin Wolf
Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. - What's left to merge for 1.0. I would still like to cache the default cache mode (probably to cache=writeback). We don't allow

Re: [PATCH 0/3] PCI: Rework config space locking, add INTx masking services

2011-10-25 Thread Jan Kiszka
On 2011-10-14 16:48, Jan Kiszka wrote: On 2011-10-06 17:48, Jesse Barnes wrote: On Mon, 12 Sep 2011 18:54:01 +0200 Jan Kiszka jan.kis...@siemens.com wrote: This series tries to heal the currently broken locking scheme around PCI config space accesses. We have an interface lock out access

Re: [BUG] qemu-kvm: memory_region_add_subregion_common: Assertion `!subregion-parent' failed.

2011-10-25 Thread Gerd Hoffmann
Hi, -M pc-0.13 That's likely vga_init_vbe vs. pci_register_bar with vga.vram. Either the PCI bar or the VBE mapping should be wrapped by an alias region pointing to the original vram. And vmware_vga seems to be affected as well. Will there be a migration flag day before 1.0? If yes we can

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Anthony Liguori
On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. - What's left to merge for 1.0. I would still like to cache the default cache mode

[PATCH v2] kvm tools: Kill double slash from kvm__get_dir()

2011-10-25 Thread Pekka Enberg
In preparation for showing kvm__get_dir() path to the user, kill the unnecessary double slash to make the output more readable. Cc: Asias He asias.he...@gmail.com Cc: Cyrill Gorcunov gorcu...@gmail.com Cc: Ingo Molnar mi...@elte.hu Cc: Sasha Levin levinsasha...@gmail.com Signed-off-by: Pekka

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Dor Laor
On 10/25/2011 03:05 PM, Anthony Liguori wrote: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. - What's left to merge for 1.0. I would

[PATCH] kvm tools: Avoid overwriting socket files with same name

2011-10-25 Thread Sasha Levin
This patch prevents overwriting socket files by running two instances with the same name. Reported-by: Osier Yang jy...@redhat.com Signed-off-by: Sasha Levin levinsasha...@gmail.com --- tools/kvm/kvm.c |3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/tools/kvm/kvm.c

Re: [RFC][PATCH] KVM: Introduce direct MSI message injection for in-kernel irqchips

2011-10-25 Thread Michael S. Tsirkin
On Tue, Oct 25, 2011 at 02:21:01PM +0200, Jan Kiszka wrote: On 2011-10-25 14:05, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 01:41:39PM +0200, Jan Kiszka wrote: On 2011-10-25 13:20, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 09:24:17AM +0200, Jan Kiszka wrote: On 2011-10-24

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Anthony Liguori
On 10/25/2011 08:18 AM, Dor Laor wrote: On 10/25/2011 03:05 PM, Anthony Liguori wrote: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. -

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Andreas Färber
Am 25.10.2011 15:18, schrieb Dor Laor: [...] it would be nice to mark a VM un-migratable [snip] Speaking of which, I'm working on the missing migration support for AHCI but fear I won't quite make it for the Nov 1 deadline. Andreas -- SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg,

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Kevin Wolf
Am 25.10.2011 15:05, schrieb Anthony Liguori: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. - What's left to merge for 1.0. I would

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Anthony Liguori
On 10/25/2011 08:56 AM, Kevin Wolf wrote: Am 25.10.2011 15:05, schrieb Anthony Liguori: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any agenda items you are interested in covering. -

Re: qemu-kvm 0.15 usb problem

2011-10-25 Thread Thomas Beinicke
Hi Gerd, I tried with the branch you suggested but it didn't work either. The whole WinXP VM crashed once I virtually plugged in the USB ISDN card. I also tried the qemu-kvm-15.1 release but that also didn't work. Do you have any further suggestions? How can I assist in debugging that problem?

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Kevin Wolf
Am 25.10.2011 16:06, schrieb Anthony Liguori: On 10/25/2011 08:56 AM, Kevin Wolf wrote: Am 25.10.2011 15:05, schrieb Anthony Liguori: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On 10/24/2011 01:04 PM, Juan Quintela wrote: Hi Please send in any

Re: [Qemu-devel] [RFC v2 PATCH 5/4 PATCH] virtio-net: send gratuitous packet when needed

2011-10-25 Thread Michael S. Tsirkin
On Tue, Oct 25, 2011 at 10:50:41AM +0800, Jason Wang wrote: On 10/24/2011 01:25 PM, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 02:54:59PM +1030, Rusty Russell wrote: On Sat, 22 Oct 2011 13:43:11 +0800, Jason Wang jasow...@redhat.com wrote: This make let virtio-net driver can send

Re: [net-next-2.6 PATCH 0/8 RFC v2] macvlan: MAC Address filtering support for passthru mode

2011-10-25 Thread Michael S. Tsirkin
On Mon, Oct 24, 2011 at 11:15:05AM -0700, Roopa Prabhu wrote: ... And also I dont know of any hw that provides an interface to set hw filters on a per queue basis. VMDq hardware would support this, no? Am not really sure. This patch uses netdev to pass filters to hw. And I don't see

RE: [net-next-2.6 PATCH 0/8 RFC v2] macvlan: MAC Address filtering support for passthru mode

2011-10-25 Thread Rose, Gregory V
-Original Message- From: Michael S. Tsirkin [mailto:m...@redhat.com] Sent: Tuesday, October 25, 2011 8:46 AM To: Roopa Prabhu Cc: net...@vger.kernel.org; s...@us.ibm.com; dragos.tatu...@gmail.com; a...@arndb.de; kvm@vger.kernel.org; da...@davemloft.net; mc...@broadcom.com;

Re: [PATCH RFC V2 4/5] kvm guest : Added configuration support to enable debug information for KVM Guests

2011-10-25 Thread Raghavendra K T
On 10/24/2011 03:45 PM, Avi Kivity wrote: On 10/23/2011 09:07 PM, Raghavendra K T wrote: Added configuration support to enable debug information for KVM Guests in debugfs Signed-off-by: Srivatsa Vaddagiriva...@linux.vnet.ibm.com Signed-off-by: Suzuki Poulosesuz...@in.ibm.com Signed-off-by:

Re: [PATCH RFC V2 3/5] kvm hypervisor : Add two hypercalls to support pv-ticketlock

2011-10-25 Thread Raghavendra K T
On 10/24/2011 07:20 PM, Srivatsa Vaddagiri wrote: * Avi Kivitya...@redhat.com [2011-10-24 15:09:25]: I guess with that change, we can also dropthe need for other hypercall introduced in this patch (kvm_pv_kick_cpu_op()). Essentially a vcpu sleeping because of HLT instruction can be woken up

Re: [PATCH RFC V2 4/5] kvm guest : Added configuration support to enable debug information for KVM Guests

2011-10-25 Thread Jeremy Fitzhardinge
On 10/24/2011 03:15 AM, Avi Kivity wrote: On 10/23/2011 09:07 PM, Raghavendra K T wrote: Added configuration support to enable debug information for KVM Guests in debugfs Signed-off-by: Srivatsa Vaddagiri va...@linux.vnet.ibm.com Signed-off-by: Suzuki Poulose suz...@in.ibm.com

Re: [PATCH RFC V2 5/5] kvm guest : pv-ticketlocks support for linux guests running on KVM hypervisor

2011-10-25 Thread Jeremy Fitzhardinge
On 10/23/2011 12:07 PM, Raghavendra K T wrote: This patch extends Linux guests running on KVM hypervisor to support pv-ticketlocks. Very early during bootup, paravirtualied KVM guest detects if the hypervisor has required feature (KVM_FEATURE_WAIT_FOR_KICK) to support pv-ticketlocks. If so,

[PATCH 0/6] Avoid soft lockup message when KVM is stopped by host

2011-10-25 Thread Eric B Munson
When a guest kernel is stopped by the host hypervisor it can look like a soft lockup to the guest kernel. This false warning can mask later soft lockup warnings which may be real. This patch series adds a method for a host hypervisor to communicate to a guest kernel that it is being stopped.

[PATCH 1/6] Add flag to indicate that a vm was stopped by the host

2011-10-25 Thread Eric B Munson
This flag will be used to check if the vm was stopped by the host when a soft lockup was detected. Signed-off-by: Eric B Munson emun...@mgebm.net --- arch/x86/include/asm/pvclock-abi.h |1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/pvclock-abi.h

[PATCH 3/6] Add ioctl for KVM_GUEST_STOPPED

2011-10-25 Thread Eric B Munson
Now that we have a flag that will tell the guest it was suspended, create an interface for that communication using a KVM ioctl. Signed-off-by: Eric B Munson emun...@mgebm.net --- arch/x86/include/asm/pvclock.h |3 +++ arch/x86/kernel/kvmclock.c | 12 arch/x86/kvm/x86.c

[PATCH 4/6] Add generic stubs for kvm stop check functions

2011-10-25 Thread Eric B Munson
Signed-off-by: Eric B Munson emun...@mgebm.net --- include/asm-generic/pvclock.h | 19 +++ 1 files changed, 19 insertions(+), 0 deletions(-) create mode 100644 include/asm-generic/pvclock.h diff --git a/include/asm-generic/pvclock.h b/include/asm-generic/pvclock.h new file

[PATCH 2/6] Add functions to check if the host has stopped the vm

2011-10-25 Thread Eric B Munson
When a host stops or suspends a VM it will set a flag to show this. The watchdog will use these functions to determine if a softlockup is real, or the result of a suspended VM. Signed-off-by: Eric B Munson emun...@mgebm.net --- arch/x86/include/asm/pvclock.h |2 ++

[PATCH 6/6] Add age out of guest paused flag

2011-10-25 Thread Eric B Munson
The KVM_GUEST_PAUSED flag will prevent a guest from compaining about a soft lockup but it can mask real soft lockups if the flag isn't cleared when it is no longer relevant. This patch adds a kvm ioctl that the hypervisor will use when it resumes a guest to start a timer for aging out the flag.

[PATCH 5/6] Add check for suspended vm in softlockup detector

2011-10-25 Thread Eric B Munson
A suspended VM can cause spurious soft lockup warnings. To avoid these, the watchdog now checks if the kernel knows it was stopped by the host and skips the warning if so. Signed-off-by: Eric B Munson emun...@mgebm.net --- kernel/watchdog.c |9 + 1 files changed, 9 insertions(+), 0

Re: [Qemu-devel] KVM call agenda for October 25

2011-10-25 Thread Alexander Graf
On 25.10.2011, at 17:32, Kevin Wolf kw...@redhat.com wrote: Am 25.10.2011 16:06, schrieb Anthony Liguori: On 10/25/2011 08:56 AM, Kevin Wolf wrote: Am 25.10.2011 15:05, schrieb Anthony Liguori: On 10/25/2011 07:35 AM, Kevin Wolf wrote: Am 24.10.2011 13:35, schrieb Paolo Bonzini: On

Re: [PATCH RFC V2 5/5] kvm guest : pv-ticketlocks support for linux guests running on KVM hypervisor

2011-10-25 Thread Jeremy Fitzhardinge
On 10/23/2011 12:07 PM, Raghavendra K T wrote: This patch extends Linux guests running on KVM hypervisor to support pv-ticketlocks. Very early during bootup, paravirtualied KVM guest detects if the hypervisor has required feature (KVM_FEATURE_WAIT_FOR_KICK) to support pv-ticketlocks. If so,

Re: [PATCH] kvm tools: Fix SDL exit on window close

2011-10-25 Thread Osier Yang
于 2011年10月25日 19:46, Sasha Levin 写道: We've changed IPC to use sockets instead of signals, but the process of closing the SDL window was still trigerring an exit signal causing an ugly message and not cleaning up after itself. This patch switches that to use the proper method of cleaning up.

about NPIV with qemu-kvm.

2011-10-25 Thread ya su
hi, hannes: I want to use NPIV with qemu-kvm, I issued the following command: echo ':' /sys/class/fc_host/host0/vport_create and it will produce a new host6 and one vport succesfully, but it does not create any virtual hba pci device. so I don't know

Re: [Qemu-devel] [RFC v2 PATCH 5/4 PATCH] virtio-net: send gratuitous packet when needed

2011-10-25 Thread Jason Wang
On 10/25/2011 11:41 PM, Michael S. Tsirkin wrote: On Tue, Oct 25, 2011 at 10:50:41AM +0800, Jason Wang wrote: On 10/24/2011 01:25 PM, Michael S. Tsirkin wrote: On Mon, Oct 24, 2011 at 02:54:59PM +1030, Rusty Russell wrote: On Sat, 22 Oct 2011 13:43:11 +0800, Jason Wang jasow...@redhat.com

Re: about NPIV with qemu-kvm.

2011-10-25 Thread Hannes Reinecke
On 10/26/2011 06:40 AM, ya su wrote: hi, hannes: I want to use NPIV with qemu-kvm, I issued the following command: echo ':' /sys/class/fc_host/host0/vport_create and it will produce a new host6 and one vport succesfully, but it does not