Hi,
i use Alpine-Linux-Xen4.12 with kernel 4.19.58-0-vanilla with several
domU's. Now I need more than 8 loop-devices for domU's.
So, I tried to configure max_loop=32. Where i can configure for
permanent usage ?
Any idea?
best regards
Helmut
On Thu, 1 Aug 2019, Helmut wrote:
> i use Alpine-Linux-Xen4.12 with kernel 4.19.58-0-vanilla with several> domU's. Now I need more than 8 loop-devices for domU's.> So, I tried to configure max_loop=32. Where i can configure for> permanent usage ?
Depends on where you need those loop devices.
If they are needed in the Dom0 _for_ the DomUs, then max_loop=32 can be
added to the kernel's command line in the Dom0's boot loader, i.e
/boot/extlinux.conf. Slightly off-topic, but: why do you need so many
loop-devices?
If these loop devices are needed within the DomUs, then it depends how
these are started. PV domains can accept an "extra=" line for kernel
parameters in the domU configuration file. Or maybe it's a HVM domain and
has its own bootloader (pygrub), then the max_loop=32 should be added to
the kernel command line within that domain.
Or maybe the DomU has "loop" compiled as a module, then it should go into
the module configuration within that domain.
So many possibilities! :-D
C.
--
BOFH excuse #305:
IRQ-problems with the Un-Interruptible-Power-Supply
Hello,
thx for the link. My actual config is:
/etc/modprobe.d/loop
options loop max_loop=32
/etc/modprobe.d/xen
options loop max_loop=32
/boot/extlinux.conf
APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin ---
vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c
modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet
rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) ---
initramfs-vanilla
NO SUCCESS !!
only my manual script has succes:
for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done
chmod 664 /dev/loop*
chown 0.disk /dev/loop*
But I need a permanently configure, did you more idea`s ?
best regards
Helmut
Am 02.08.2019 um 02:08 schrieb PICCORO McKAY Lenz:
>> El jue., 1 de ago. de 2019 a la(s) 15:39, Helmut (helmut_pohl@arcor.de> <mailto:helmut_pohl@arcor.de>) escribió:>> So, I tried to configure max_loop=32. Where i can configure for> permanent usage ?>>>> http://qgqlochekone.blogspot.com/2010/10/lopp-management-manejo-de-loops.html>> >>> Any idea?>> best regards> Helmut>>
Hello Christian,
thx for your help. My actual config is:
/etc/modprobe.d/loop
options loop max_loop=32
/etc/modprobe.d/xen
options loop max_loop=32
/boot/extlinux.conf
APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin ---
vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c
modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet
rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) ---
initramfs-vanilla
NO SUCCESS !!
only my manual script has succes:
for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done
chmod 664 /dev/loop*
chown 0.disk /dev/loop*
But I need a permanently configure in dom0 for start of 10 domU within
hd-devices, did you more idea`s ?
best regards
Helmut
Am 02.08.2019 um 02:34 schrieb Christian Kujau:
> On Thu, 1 Aug 2019, Helmut wrote:>> i use Alpine-Linux-Xen4.12 with kernel 4.19.58-0-vanilla with several>> domU's. Now I need more than 8 loop-devices for domU's.>> So, I tried to configure max_loop=32. Where i can configure for>> permanent usage ?> Depends on where you need those loop devices.>> If they are needed in the Dom0 _for_ the DomUs, then max_loop=32 can be > added to the kernel's command line in the Dom0's boot loader, i.e > /boot/extlinux.conf. Slightly off-topic, but: why do you need so many > loop-devices?>> If these loop devices are needed within the DomUs, then it depends how > these are started. PV domains can accept an "extra=" line for kernel > parameters in the domU configuration file. Or maybe it's a HVM domain and > has its own bootloader (pygrub), then the max_loop=32 should be added to > the kernel command line within that domain.>> Or maybe the DomU has "loop" compiled as a module, then it should go into > the module configuration within that domain.>> So many possibilities! :-D>> C.
El vie., 2 de ago. de 2019 a la(s) 05:36, Helmut
(helmut_pohl@arcor.de) escribió:
>> thx for the link. My actual config is:>> APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin --- vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) --- initramfs-vanilla
OH xen vm! so i must do furter investigations.. i'll back with some info.. later
>> NO SUCCESS !!>>> only my manual script has succes:>> for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done> chmod 664 /dev/loop*> chown 0.disk /dev/loop*>>> But I need a permanently configure, did you more idea`s ?>> best regards> Helmut>>>>> Am 02.08.2019 um 02:08 schrieb PICCORO McKAY Lenz:>>> El jue., 1 de ago. de 2019 a la(s) 15:39, Helmut (helmut_pohl@arcor.de) escribió:>>>> So, I tried to configure max_loop=32. Where i can configure for>> permanent usage ?>>>> http://qgqlochekone.blogspot.com/2010/10/lopp-management-manejo-de-loops.html>>>>>>>> Any idea?>>>> best regards>> Helmut>>>>
Hello,
do you have a solution for my problem with Alpine-Linux-Xen and max_loops ?
best regards
Helmut Pohl
Am 02.08.2019 um 18:05 schrieb PICCORO McKAY Lenz:
> El vie., 2 de ago. de 2019 a la(s) 05:36, Helmut> (helmut_pohl@arcor.de) escribió:>> thx for the link. My actual config is:>>>> APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin --- vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) --- initramfs-vanilla> OH xen vm! so i must do furter investigations.. i'll back with some info.. later>>>> NO SUCCESS !!>>>>>> only my manual script has succes:>>>> for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done>> chmod 664 /dev/loop*>> chown 0.disk /dev/loop*>>>>>> But I need a permanently configure, did you more idea`s ?>>>> best regards>> Helmut>>>>>>>>>> Am 02.08.2019 um 02:08 schrieb PICCORO McKAY Lenz:>>>>>> El jue., 1 de ago. de 2019 a la(s) 15:39, Helmut (helmut_pohl@arcor.de) escribió:>>> So, I tried to configure max_loop=32. Where i can configure for>>> permanent usage ?>>>>>> http://qgqlochekone.blogspot.com/2010/10/lopp-management-manejo-de-loops.html>>>>>>>>>> Any idea?>>>>>> best regards>>> Helmut>>>>>>
On 8/6/19 7:59 AM, Helmut wrote:
> Hello,> > do you have a solution for my problem with Alpine-Linux-Xen and max_loops ?> > best regards> Helmut Pohl>
Try adding `loop max_loop=32` to /etc/modules and reboot.
Hello,
thanks for your help. My actual config is:
/etc/modules
loop max_loop=32
/etc/modprobe.d/loop
options loop max_loop=32
/etc/modprobe.d/xen
options loop max_loop=32
/boot/extlinux.conf
APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin ---
vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c
modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet
rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) ---
initramfs-vanilla
NO SUCCESS !!
only my manual script has succes:
for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done
chmod 664 /dev/loop*
chown 0.disk /dev/loop*
But I need a permanently configure in dom0 for start of 10 domU within
hd-devices, did you more idea`s ?
best regards
Helmut
Am 06.08.2019 um 14:10 schrieb Cosmo Borsky:
> On 8/6/19 7:59 AM, Helmut wrote:>> Hello,>>>> do you have a solution for my problem with Alpine-Linux-Xen and max_loops ?>>>> best regards>> Helmut Pohl>>> > Try adding `loop max_loop=32` to /etc/modules and reboot.>
On 8/6/19 8:26 AM, Helmut wrote:
> Hello,> > thanks for your help. My actual config is:> > /etc/modules> loop max_loop=32> > /etc/modprobe.d/loop> options loop max_loop=32> > /etc/modprobe.d/xen> options loop max_loop=32> > /boot/extlinux.conf> > APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin ---> vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c> modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet> rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) ---> initramfs-vanilla> > NO SUCCESS !!> > > only my manual script has succes:> > for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done> chmod 664 /dev/loop*> chown 0.disk /dev/loop*> > > But I need a permanently configure in dom0 for start of 10 domU within> hd-devices, did you more idea`s ?> > best regards> Helmut>
I see now, when booting only 8 loop modules will be made regardless of
the max_loop parameter.
The loops will be made when:
```
# ls /dev/loop[0-9]* | wc -l
8
# rmmod loop
# modprobe loop max_loop=32
# ls /dev/loop[0-9]* | wc -l
32
```
The loop module is loaded from the initfs without the /etc/modules and
/etc/modprobe.d options. In order to load those options, you will need
to add loop to /etc/mkinitfs/mkinitfs.conf, like so:
`/etc/mkinitfs/mkinitfs.conf/`
```
features="... loop"
```
After adding loop to your features list, run `mkinitfs` as root and then
reboot.
El mar., 6 de ago. de 2019 a la(s) 08:25, Helmut
(helmut_pohl@arcor.de) escribió:
> /etc/modules> loop max_loop=32> /etc/modprobe.d/loop> options loop max_loop=32> /etc/modprobe.d/xen> options loop max_loop=32> /boot/extlinux.conf
THAT never will work due only affect your main operatin system.. not
the xen node
The internal emulated system must have all those changes!
After some testing, the `/etc/mkinitfs/mkinitfs.conf` edit is
unnecessary. `mkinitfs` is all you need after updating
`/etc/modprobe.d/loop.conf`
I have posted this on the Alpine Linux Xen wiki page:
https://wiki.alpinelinux.org/wiki/Xen_Dom0#Loop_Devices
On 8/6/19 8:46 AM, Cosmo Borsky wrote:
> On 8/6/19 8:26 AM, Helmut wrote:>> Hello,>>>> thanks for your help. My actual config is:>>>> /etc/modules>> loop max_loop=32>>>> /etc/modprobe.d/loop>> options loop max_loop=32>>>> /etc/modprobe.d/xen>> options loop max_loop=32>>>> /boot/extlinux.conf>>>> APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin --->> vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c>> modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet>> rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) --->> initramfs-vanilla>>>> NO SUCCESS !!>>>>>> only my manual script has succes:>>>> for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done>> chmod 664 /dev/loop*>> chown 0.disk /dev/loop*>>>>>> But I need a permanently configure in dom0 for start of 10 domU within>> hd-devices, did you more idea`s ?>>>> best regards>> Helmut>>> > I see now, when booting only 8 loop modules will be made regardless of> the max_loop parameter.> The loops will be made when:> ```> # ls /dev/loop[0-9]* | wc -l> 8> # rmmod loop> # modprobe loop max_loop=32> # ls /dev/loop[0-9]* | wc -l> 32> ```> > The loop module is loaded from the initfs without the /etc/modules and> /etc/modprobe.d options. In order to load those options, you will need> to add loop to /etc/mkinitfs/mkinitfs.conf, like so:> > `/etc/mkinitfs/mkinitfs.conf/`> ```> features="... loop"> ```> > After adding loop to your features list, run `mkinitfs` as root and then> reboot.>
Hello
that's it. That's the solution for my problem.
THANK YOU
Now, after reboot the xen-dom0 have 32 /dev/loop* :-)))
/etc/modprobe.d/loop.conf and mkinitfs were the solution.
best regards
Helmut Pohl
Am 06.08.2019 um 16:33 schrieb Cosmo Borsky:
> After some testing, the `/etc/mkinitfs/mkinitfs.conf` edit is> unnecessary. `mkinitfs` is all you need after updating> `/etc/modprobe.d/loop.conf`>> I have posted this on the Alpine Linux Xen wiki page:> https://wiki.alpinelinux.org/wiki/Xen_Dom0#Loop_Devices>> On 8/6/19 8:46 AM, Cosmo Borsky wrote:>> On 8/6/19 8:26 AM, Helmut wrote:>>> Hello,>>>>>> thanks for your help. My actual config is:>>>>>> /etc/modules>>> loop max_loop=32>>>>>> /etc/modprobe.d/loop>>> options loop max_loop=32>>>>>> /etc/modprobe.d/xen>>> options loop max_loop=32>>>>>> /boot/extlinux.conf>>>>>> APPEND xen.gz dom0_mem=2048M dom0_max_vcpus=2 dom0_vcpus_pin --->>> vmlinuz-vanilla root=UUID=dad93766-6001-4458-a5de-d6ac14007b4c>>> modules=sd-mod,usb-storage,ext4,loop,xen-pciback nomodeset quiet>>> rootfstype=ext4 max_loop=32 xen-pciback.hide=(0000:04:01.0) --->>> initramfs-vanilla>>>>>> NO SUCCESS !!>>>>>>>>> only my manual script has succes:>>>>>> for i in $(seq 8 32) ; do mknod /dev/loop$i b 7 $i ;done>>> chmod 664 /dev/loop*>>> chown 0.disk /dev/loop*>>>>>>>>> But I need a permanently configure in dom0 for start of 10 domU within>>> hd-devices, did you more idea`s ?>>>>>> best regards>>> Helmut>>>>> I see now, when booting only 8 loop modules will be made regardless of>> the max_loop parameter.>> The loops will be made when:>> ```>> # ls /dev/loop[0-9]* | wc -l>> 8>> # rmmod loop>> # modprobe loop max_loop=32>> # ls /dev/loop[0-9]* | wc -l>> 32>> ```>>>> The loop module is loaded from the initfs without the /etc/modules and>> /etc/modprobe.d options. In order to load those options, you will need>> to add loop to /etc/mkinitfs/mkinitfs.conf, like so:>>>> `/etc/mkinitfs/mkinitfs.conf/`>> ```>> features="... loop">> ```>>>> After adding loop to your features list, run `mkinitfs` as root and then>> reboot.>>