[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
Ubuntu 19.10 (Eoan Ermine) has reached end of life, so this bug will not be fixed for that specific release. ** Changed in: kdump-tools (Ubuntu Eoan) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
Ubuntu 20.10 (Groovy Gorilla) has reached end of life, so this bug will not be fixed for that specific release. ** Changed in: kdump-tools (Ubuntu Groovy) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
The Groovy Gorilla has reached end of life, so this bug will not be fixed for that release ** Changed in: makedumpfile (Ubuntu Groovy) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
The Eoan Ermine has reached end of life, so this bug will not be fixed for that release ** Changed in: makedumpfile (Ubuntu Eoan) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** No longer affects: makedumpfile (Ubuntu Cosmic) ** No longer affects: makedumpfile (Ubuntu Disco) ** Also affects: makedumpfile (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: makedumpfile (Ubuntu Groovy) Importance: High Assignee: Guilherme G. Piccoli (gpiccoli) Status: In Progress ** Changed in: makedumpfile (Ubuntu Focal) Status: New => Confirmed ** Changed in: makedumpfile (Ubuntu Eoan) Status: In Progress => Confirmed ** Changed in: makedumpfile (Ubuntu Groovy) Status: In Progress => Confirmed ** Changed in: makedumpfile (Ubuntu Focal) Importance: Undecided => Medium ** Changed in: makedumpfile (Ubuntu Groovy) Importance: High => Medium ** Changed in: makedumpfile (Ubuntu Eoan) Importance: High => Medium ** Changed in: makedumpfile (Ubuntu Bionic) Importance: High => Medium ** Changed in: makedumpfile (Ubuntu Xenial) Importance: High => Medium ** Changed in: makedumpfile (Ubuntu Focal) Assignee: (unassigned) => Guilherme G. Piccoli (gpiccoli) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
Ubuntu 19.04 reached end of life on January 23, 2020. I am therefore marking this bug 'wontfix' for that release. ** Changed in: makedumpfile (Ubuntu Disco) Status: Confirmed => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Changed in: makedumpfile (Ubuntu Cosmic) Status: Confirmed => Won't Fix ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
This is the debdiff containing the proposed solution for this LP. I'd like to thanks specially Cascardo and Heitor for the fruitful discussions with regards the direction we should take in this LP. ** Changed in: makedumpfile (Ubuntu Cosmic) Status: In Progress => Confirmed ** Changed in: makedumpfile (Ubuntu Eoan) Status: Confirmed => In Progress ** Changed in: makedumpfile (Ubuntu Bionic) Status: In Progress => Confirmed ** Patch added: "lp1800562_eoan.debdiff" https://bugs.launchpad.net/ubuntu/bionic/+source/makedumpfile/+bug/1800562/+attachment/5275119/+files/lp1800562_eoan.debdiff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Description changed:
[Impact]
- Crash kernels include an obsolete "nousb" parameter by default, which can
cause confusion since it's been deprecated in newer kernel versions.
+ * Kdump command-line include an obsolete "nousb" parameter by default, which
can cause a misimpression: users will think they are not booting with USB, but
they are.
- [Description]
- Since kernel v4.5, the correct parameter to disable USB subsystem
initialization is "usbcore.nousb" always (instead of "nousb" in case the
subsystem is built-in). This was changed by commit 097a9ea0e48 ("usb: make
"nousb" a clear module parameter").
+ * Since kernel v4.5, the correct parameter to disable USB subsystem
+ initialization is "usbcore.nousb" always (instead of "nousb" in case the
+ subsystem is built-in). This was changed by commit 097a9ea0e48 ("usb:
+ make "nousb" a clear module parameter").
- We need to take this into account in kdump-tools, or else we may boot
- with USB in kdump even the command-line appears to be saying the
- opposite.
+ * USB may be pretty essential in case for example kdump users need to
+ decrypt a disk under LUKS, and there's only an USB keyboard connected to
+ the system. Given the option is innocuous since Bionic, we should just
+ drop it to prevent confusion.
- This affects Xenial onwards, since the system may be running an HWE or
- other supported v4.5+ kernel.
[Test Case]
+
1) Deploy a Disco VM e.g. with uvt-kvm
2) Install the kdump-tools package
3) Run `kdump-config test`and check for the 'nousb' parameter:
$ kdump-config test
...
kexec command to be used:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic
root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0 nr_cpus=1
systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0"
/var/lib/kdump/vmlinuz
+
[Regression Potential]
- The regression potential is extremely low, since it doesn't need any changes
in makedumpfile code and we're only removing an already ineffective parameter
from the crashkernel cmdline. Nonetheless, patches will be tested with
autopkgtests and normal kdump use-case scenarios.
+
+ The regression potential is extremely low, since the "nousb" parameter
+ is not used since Bionic although is there. Any bugs we would have by
+ changing this are still valid by not removing the option - the semantics
+ with or without "nosub" is the same since from Bionic.
+
+ NOTICE we won't change Xenial, it can use kernel 4.4 which indeed
+ disables USB by taking the "nousb" parameter.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1800562
Title:
Remove obsolete "nousb" option in kdump command-line for newer kernels
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Also affects: makedumpfile (Ubuntu Eoan) Importance: High Assignee: Heitor Alves de Siqueira (halves) Status: Opinion ** Changed in: makedumpfile (Ubuntu Xenial) Status: In Progress => Won't Fix ** Changed in: makedumpfile (Ubuntu Disco) Status: Opinion => Confirmed ** Changed in: makedumpfile (Ubuntu Eoan) Status: Opinion => Confirmed ** Changed in: makedumpfile (Ubuntu Xenial) Assignee: Heitor Alves de Siqueira (halves) => Guilherme G. Piccoli (gpiccoli) ** Changed in: makedumpfile (Ubuntu Bionic) Assignee: Heitor Alves de Siqueira (halves) => Guilherme G. Piccoli (gpiccoli) ** Changed in: makedumpfile (Ubuntu Cosmic) Assignee: Heitor Alves de Siqueira (halves) => Guilherme G. Piccoli (gpiccoli) ** Changed in: makedumpfile (Ubuntu Disco) Assignee: Heitor Alves de Siqueira (halves) => Guilherme G. Piccoli (gpiccoli) ** Changed in: makedumpfile (Ubuntu Eoan) Assignee: Heitor Alves de Siqueira (halves) => Guilherme G. Piccoli (gpiccoli) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Tags added: seg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Tags removed: patch sts -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
Unsubscribing the Ubuntu Sponsors Team as there is nothing to sponsor. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1800562 Title: Remove obsolete "nousb" option in kdump command-line for newer kernels To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1800562] Re: Remove obsolete "nousb" option in kdump command-line for newer kernels
** Description changed:
[Impact]
- Crash kernels come up with the usb subsystem enabled, even when it should be
disabled by default.
+ Crash kernels include an obsolete "nousb" parameter by default, which can
cause confusion since it's been deprecated in newer kernel versions.
[Description]
Since kernel v4.5, the correct parameter to disable USB subsystem
initialization is "usbcore.nousb" always (instead of "nousb" in case the
subsystem is built-in). This was changed by commit 097a9ea0e48 ("usb: make
"nousb" a clear module parameter").
We need to take this into account in kdump-tools, or else we may boot
- with USB in kdump even the command-line saying the opposite.
+ with USB in kdump even the command-line appears to be saying the
+ opposite.
This affects Xenial onwards, since the system may be running an HWE or
other supported v4.5+ kernel.
[Test Case]
1) Deploy a Disco VM e.g. with uvt-kvm
2) Install the kdump-tools package
- 3) Run `kdump-config test`and check for the 'usbcore.nousb' parameter:
+ 3) Run `kdump-config test`and check for the 'nousb' parameter:
$ kdump-config test
...
kexec command to be used:
/sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.15.0-45-generic
root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0 nr_cpus=1
systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0"
/var/lib/kdump/vmlinuz
[Regression Potential]
- The regression potential is very low, since it doesn't need any changes in
makedumpfile and we're only adding a parameter on the crashkernel cmdline.
- According to kernel documentation [0], unknown parameters will be ignored if
they contain a dot (usbcore.nousb), so this change should have no impact on
v4.4 and earlier kernels.
- Nonetheless, the fix will be tested with autopkgtests and normal kdump
use-case scenarios.
-
- [0] https://www.kernel.org/doc/Documentation/admin-guide/kernel-
- parameters.rst
+ The regression potential is extremely low, since it doesn't need any changes
in makedumpfile code and we're only removing an already ineffective parameter
from the crashkernel cmdline. Nonetheless, patches will be tested with
autopkgtests and normal kdump use-case scenarios.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1800562
Title:
Remove obsolete "nousb" option in kdump command-line for newer kernels
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1800562/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
