I've made some good progress here.
I found that older version like 4.19 work, so I ran git bisect. I'm
still doing the final check, but it looks like the series that causes
the issue is the one containing these:
d53d2f78cead bpf: Use vmalloc special flag
1a7b7d922081 modules: Use vmalloc special
I can repro on upstream, all the way back to 5.4.0. It might have
existed before that - I haven't tested any earlier yet.
Was the test methodology changed just before this was found? I'm just
wondering why it suddenly appeared ~a year after Focal was released. I
thought it might have been a patch
I can repro this with the latest Focal kernel on:
description: PowerNV
product: 8247-22L (IBM Power System S822L)
Trying to see if I can repro it upstream.
FWIW my opening hypothesis is that something in a percpu data structure
isn't getting updated over hotplug.
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I cannot yet explain this, but after bisecting the config, I can repro
this with pseries_le_defconfig + CONFIG_RCU_SCALE_TEST=m
That's weird to me, and I'll continue to investigate.
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The 5.3.0 HWE kernel also works, which means we now have a good
workaround while we debug things.
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https://bugs.launchpad.net/bugs/1863044
Title:
qla2xxx no longer detects
Hi Mauricio,
5.4.0-14 works for me, dmesg attached.
I'll see if an HWE kernel supplied in the bionic repositories also
works, maybe we can use that in the mean time so we don't fall any
further behind on kernel updates while we debug this.
Regards,
Daniel
** Attachment added: "dmesg-5.4.0-14-ge
Ah, I was just about to tell you that I have just tried master-next at
a59858e18bc8996f8c96d307a33e504b079dc541 ! I think that is the same sha
that ended up being tagged as -89, so I think it provides us with the
same information.
Sadly -89 also doesn't seem to work; dmesg attached.
I don't know
** Attachment added: "dmesg from -72"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863044/+attachment/5329133/+files/dmesg-72
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Hi Mauricio,
Thanks for the prompt answer! After a lot of messing around to get a
remote console, I can finally test. It looks like -88 doesn't work. I'm
attaching a dmesg from -88 and -72. I will build and test master-next
next.
Regards,
Daniel
** Attachment added: "dmesg from -88"
https://
** Attachment added: "lspci-vnvn.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1863044/+attachment/5327820/+files/lspci-vnvn.log
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Public bug reported:
We have an IBM BladeCentre Hx5 with a number of blades running Ubuntu
18.04.3. Storage is attached over Fiber Channel.
They all boot fine with 4.15.0-72 - the qla2xxx detects all the LUNs. On
4.15.0-74 and 4.15.0-76, the qla2xxx driver loads but the LUNs are not
detected. Thi
My colleague has verified all 4 versions. In all cases, on supported
hardware, the test now operates as expected: the secret does not leak
unless the mitigation is manually turned off.
I notice the SRU verification is happening a bit sooner than I expected
- when do you expect these kernels to be
The embargo has expired so I'm making this public now.
** Description changed:
Hi,
Recently you would have been notified about CVE-2019-18660 via email to
the linux-distros private mailing list. In short, it is a bug in the
Spectre v2 class affecting powerpc.
We have developed so
Hi Michael R,
I tried to apply your patches to test them and support the effort to get
them included in the Bionic kernel, but I'm having some trouble applying
them:
ubuntu@dja-bionic:~/bionic$ git am
../patches/01-powerpc-64s-add-support-for-ori-barrier_nospec.patch
Patch format detection faile
** Description changed:
+ SRU Justification
+ =
+
+ [Impact]
+
+ Some users see panics like the following when performing fstrim on a
+ bcached volume:
+
+ [ 529.803060] BUG: unable to handle kernel NULL pointer dereference at
0008
+ [ 530.183928] #PF error: [norm
The user has verified that the -proposed kernel resolves their issue.
Regards,
Daniel
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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ht
The OpenPower partner reports that their system is fixed with this
kernel.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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Hi,
I have a patch which I believe fixes your issue:
https://www.spinics.net/lists/linux-bcache/msg06997.html
It looks like it will go in to the 5.1 kernel, and I will propose it for
backporting to earlier Ubuntu kernels.
Regards,
Daniel
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I think I have discovered the cause: https://lore.kernel.org/linux-
block/87h8e9ii2l@linkitivity.dja.id.au/
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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I've checked that the proposed Xenial AWS kernel works - it boots
successfully and uses the deadline scheduler by default on a t2.micro
instance.
Regards,
Daniel
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Public bug reported:
SRU Justification
=
[Impact]
An IBM OpenPower partner reports their system with a bunch of NVMe
drives fails the NVMe init due to some drives taking PCIe EEH errors.
[Fix]
Pick patch db2173198b9513f7add8009f225afa1f1c79bcc6 upstream.
[Testing]
IBM reports
** Description changed:
A user reports that using an i40e with intel_iommu=on with the Xenial GA
kernel causes data corruption. Using the Xenial HWE kernel or an out-of-
tree driver more recent than the version shipped with Xenial solves the
issue.
[Impact]
Corrupted data is returne
Public bug reported:
A user reports that using an i40e with intel_iommu=on with the Xenial GA
kernel causes data corruption. Using the Xenial HWE kernel or an out-of-
tree driver more recent than the version shipped with Xenial solves the
issue.
[Impact]
Corrupted data is returned from the networ
** Description changed:
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by
default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads
on HDD disks.
[Fix]
Amazon Linux has a commit which re
Public bug reported:
In current Ubuntu kernels, PV blkfront drivers have blk-mq enabled by
default and cannot use the old I/O scheduler.
[Impact]
blk-mq is not as fast as the old request-based scheduler for some workloads on
HDD disks.
[Fix]
Amazon Linux has a commit which reintroduces the requ
** Tags added: sts
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https://bugs.launchpad.net/bugs/1798706
Title:
Incomplete linking with boost_regex
Status in linux package in Ubuntu:
In Progress
Bug description:
aries
dpkg-shlibdeps: warning: symbol _ZN5boost9re_detail13get_mem_blockEv used by
debian/google-compute-engine-oslogin/lib/libnss_google-compute-engine-oslogin-1.3.1.so
found in none of the libraries
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: Daniel Axtens (daxtens)
aries
dpkg-shlibdeps: warning: symbol _ZN5boost9re_detail13get_mem_blockEv used by
debian/google-compute-engine-oslogin/lib/libnss_google-compute-engine-oslogin-1.3.1.so
found in none of the libraries
** Affects: linux (Ubuntu)
Importance: Critical
Assignee: Daniel Axtens (daxtens)
** Description changed:
SRU Justification
-
[Impact]
A kernel BUG is sometimes observed when using fscache:
[4740718.880898] FS-Cache:
[4740718.880920] FS-Cache: Assertion failed
[4740718.880934] FS-Cache: 0 > 0 is false
[4740718.881001] --
Public bug reported:
SRU Justification
-
[Impact]
A kernel BUG is sometimes observed when using fscache:
[4740718.880898] FS-Cache:
[4740718.880920] FS-Cache: Assertion failed
[4740718.880934] FS-Cache: 0 > 0 is false
[4740718.881001] [ cut here ]-
Hi,
I haven't found the time to do this yet, sorry. Is it still an issue on
the current Xenial kernel?
Regards,
Daniel
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Title:
lin
) finally check using cat /proc/fs/fscache/stats | grep -i pages ;
free -h , cat /proc/meminfo and page-types -r -b lru
to ensure all pages are freed.
[Regression Potential]
Limited to cachefiles.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (da
** Changed in: linux (Ubuntu)
Assignee: Daniel Axtens (daxtens) => (unassigned)
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https://bugs.launchpad.net/bugs/1783246
Title:
Cephfs + fscache: unable to han
** Description changed:
== SRU Justification ==
[Impact]
Oops during heavy NFS + FSCache use:
- [81738.886634] FS-Cache:
+ [81738.886634] FS-Cache:
[81738.888281] FS-Cache: Assertion failed
[81738.889461] FS-Cache: 6 == 5 is false
[81738.890625] [ cut here ]-
(Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Invalid
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Title:
Various fscache/cachefiles bugs
Oops, my mistake, there are already LP bugs covering these issues.
Regards,
Daniel
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
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Ubuntu:
New
Bug description:
Per an email forwarded within IBM, we wish to use this Launchpad bug
to work on the technical discussion with the Canonical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue
d has been in mainline
since v4.16. So the risk of regression is well contained.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
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Bug description:
Per an email forwarded within IBM, we wish to use this Launchpad bug
to work on the technical discussion with the Canonical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
Launchpad bug
to work on the technical discussion with the Canonical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
#00177825.
The only statement at the moment by the KVM team was that
discussion with the Canonical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
#00177825.
The only statement at the moment by the KVM team was that there were
various issues associate
discussion with the Canonical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
#00177825.
The only statement at the moment by the KVM team was that there were
various issues associate
al development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
#00177825.
The only statement at the moment by the KVM team was that there were
various issues associated with CMA fragmentation ca
onical development
folks and the IBM KVM and kernel team surrounding the analysis made by
Daniel Axtens of Canonical for the customer issue raised in Case
#00177825.
The only statement at the moment by the KVM team was that there were
various issues associated with CMA fragmentation causing
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu Trusty)
Importance: Undecided => High
** Changed in: linux (Ubuntu Xenial)
Importance: Undecided => High
** Changed in: linux (Ubuntu Artful)
Importance: Undecided => High
** Changed in: linux (
: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
** Description changed:
+ == SRU Justification ==
+
[Impact]
-
- Under heavy NFS + FSCache load, a user sometimes observes a hang in
- __fscache_wait_on_page_write+0x5f/0xa0.
+ Under heavy NFS + FSCache load, a user
en observed so far.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Daniel Axtens (daxtens)
-
Hi,
I have a report from another user reporting this. I will submit it to
the kernel team.
Regards,
Daniel
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1742658
Title:
linux-generic-hwe-16.04 OOPS in nouveau after se
ock
** Changed in: linux (Ubuntu)
Assignee: Dragan S. (dragan-s) => Daniel Axtens (daxtens)
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Title:
user space process hung
Public bug reported:
The kdump/crashdump kernel is panicing during boot on Bionic.
1) Install the daily Bionic server or desktop ISO
2) apt install linux-crashdump, say yes to kdump being enabled
3) Reboot so as to boot with the correct kernel parameter
4) Run:
root@bionic-server:~# echo 1 >
Hi,
We do ship an iso for ppc64le for Trusty - I'm not sure whether it does
bare metal/PowerNV or just as an LPAR under PowerVM, but it's probably a
bit moot at this point.
The good news is that as you can see, the artful kernel was released with the
fix.
The Xenial kernel also contains the fix;
Fantastic!
If I understand correctly, that is sufficient for verification-done-
artful, so I am changing that over for you.
The one remaining kernel is Trusty 3.13. I am guessing your module
doesn't compile for that? If it doesn't, there probably isn't much point
on booting with just a virtual et
Hi,
Thanks for the Xenial test!
The kernel team process is that patches will always be committed from
the most recent kernel first and then back to older kernels, so that no-
one ends up with a regression if they upgrade to a more recent kernel.
So if it is applied to Xenial it will be applied to
Hi,
As well as Po-Hsu's comment above, I also have this internal update from
the kernel team:
As this is also a security fix, don't stress too much. If things
could be verified for at least for one of the kernels until next week
that is better than nothing. We are rather unlikely rip out fixe
Hi,
I am the support engineer on the Canonical side who has been working on
this with IBM Support on your behalf. Apologies for the confusion. I
will contact our kernel team now and get this clarified for you as soon
as I can.
Now, I can't speak for the kernel team or make any commitments on thei
I have tested this with the kernel bpf self-test, and it passes.
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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** Description changed:
[SRU Justification]
[Impact]
- On Artful kernels, X fails to start and a kernel splat is printed.
+ On Artful and Bionic kernels, X fails to start and a kernel splat is printed.
This is cbecause ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is
incomplete:
Hi Fred,
Thanks for the update. I have tried to nominate the bug for Bionic; I
think the kernel team normally does this so we will see if that has
worked.
More importantly, I will test and send a patch for Bionic shortly.
Regards,
Daniel
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Hi all,
I think there are two issues at play here, one is the bad pmd one, and
one is the original "huge_memory: mapcount 0 page_mapcount 1".
Perhaps we could break the bad pmd issue out into a different LP bug?
People with the original bug - was anyone able to verify if this
happened on a more
Hi,
I installed 4.13.0-35-generic from artful-proposed. The kernel boots and
X starts fine, so this has passed verification.
Regards,
Daniel
** Tags removed: verification-needed-artful
** Tags added: verification-done-artful
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Hi,
I'm happy to submit this patch to the kernel team, but I wanted to talk
about the kernel process and ask a question first.
The way this process usually works is:
- patch submitted to kernel team
- kernel team checks patch and if they are happy with it, applies it to the
kernel
- this is b
** Description changed:
SRU Justification
=
A ppc64le system runs as a guest under PowerVM. This guest has a bnx2x
card attached, and uses openvswitch to bridge an ibmveth interface for
traffic from other LPARs.
We see the following crash sometimes when running ne
This has been assigned CVE-2018-126.
** CVE added: https://cve.mitre.org/cgi-
bin/cvename.cgi?name=2018-126
** Description changed:
SRU Justification
=
A ppc64le system runs as a guest under PowerVM. This guest has a bnx2x
card attached, and uses openvswitch to
** Description changed:
SRU Justification
=
A ppc64le system runs as a guest under PowerVM. This guest has a bnx2x
card attached, and uses openvswitch to bridge an ibmveth interface for
traffic from other LPARs.
We see the following crash sometimes when running ne
** Description changed:
- (This bug provides a place to track the progress of this issue upstream
- and then in to Ubuntu.)
+ SRU Justification
+ =
A ppc64le system runs as a guest under PowerVM. This guest has a bnx2x
card attached, and uses openvswitch to bridge an ibmveth
A set of 2 patches to fix this was accepted upstream:
https://github.com/torvalds/linux/commit/2b16f048729bf35e6c28a40cbfad07239f9dcd90
https://github.com/torvalds/linux/commit/8914a595110a6eca69a5e275b323f5d09e18f4f9
I will send an SRU shortly.
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** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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Title:
tar -x sometimes fails on overlayfs
Status in linux
Public bug reported:
SRU Justification
=
Coverity reports:
*** CID 1464330: Uninitialized variables (MISSING_RETURN)
/arch/x86/net/bpf_jit_comp.c: 1088 in bpf_int_jit_compile()
1082int i;
1083 1084 if (!bpf_jit_enable)
1085return pr
I have talked to the kernel team about this and updated Fred off-line.
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https://bugs.launchpad.net/bugs/1738334
Title:
hisilicon hibmc regression due to ea642c3216cb ("drm/
Hi Frank,
Yes, that is how I see it - these changes can go through, but we need
good docs to point people to as there is an incredibly high likelihood
of misconfiguration at various points.
Regards,
Daniel
On Tue, Dec 19, 2017 at 3:46 AM, Frank Heimes
<1692...@bugs.launchpad.net> wrote:
> Siva a
** Description changed:
- ea642c3216cb ("drm/ttm: add io_mem_pfn callback") is incomplete: the
- hisilicon hibmc driver does not contain the callback and so X does not
- start.
+ [SRU Justification]
- Discussion and potential fix at https://lists.freedesktop.org/archives
- /dri-devel/2017-Novem
Confirmed - the symptom is a kernel splat about "Attempting to execute
userspace memory" triggered by Xorg with LR in ttm_bo_vm_fault - see
attached screenshot (sorry!)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Attachment added: "splat.png"
https://bugs.launchpa
Hi Fred,
The artful repository is git://kernel.ubuntu.com/ubuntu/ubuntu-
artful.git
It contains 4417ec7a7c8d ("UBUNTU: SAUCE: PCI: Support hibmc VGA cards
behind a misbehaving HiSilicon bridge")
This was an earlier version of those patches and should allow xorg
autoconfiguration to work.
Regard
There is another bug causing an artful regression - opening a new LP for
that: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738334
** Changed in: linux (Ubuntu Artful)
Status: Incomplete => Fix Released
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cts Artful, upstream has not landed on a solution yet as far as
I can tell, so lets backport the first proposed small fix.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: New
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Hi Fred,
I will have a look soon and update you.
Regards,
Daniel
On Mon, Dec 11, 2017 at 6:00 PM, Fred Kimmy
wrote:
> this patch will solve commit #10 bug, please merge this patch.
>
> thank you
>
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> report.
> https
The patch does seem to be in Artful, following up with the user.
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https://bugs.launchpad.net/bugs/1698700
Title:
hibmc driver does not include "pci:" prefix in bus ID
Stat
** Description changed:
[SRU Justification]
[Impact]
- Some NVMe operations time out too quickly. The module parameters allow the
timeouts to be extended, but only up to 255s, as the counters are bytes.
+ Some NVMe operations time out too quickly. The module parameters allow the
timeouts
Hi Siva,
Thank you for your quick and thoughtful response.
I will ask about the default MTU for the veth interface to see if the
user increased it themselves.
I'm not sure I completely understand what you mean about largesend
offload being disabled after retransmits. I'm also not completely sure
Hi Bryant,
So, to be crystal clear, IBM's position is if customers are using this
setup, that they should set the MTU in their AIX partitions to 1500? (or
9000 if using jumbo frames)
Is this documented anywhere on your website that we can point users to?
I ask because I have asked one of your cu
Just as an update: I am working with Jay V on a set of patches to drop
the oversized packets at the openvswitch/bridge level to prevent the
crash I mentioned.
But that is not sufficient to solve the underlying problem: there will
still be packet loss when there's an MTU mismatch here. A device in
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Title:
NVMe timeout is too short
Status in
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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Title:
Neighbour confirmation broken, breaks ARP cache aging
too, by picking patch
http://lists.infradead.org/pipermail/linux-nvme/2017-September/012701.html
[Regression Potential]
Very limited: only types of module parameters are changing, the patch is easily
reviewable.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens
.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
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Ti
Hi,
It turns out that support for this driver would require a very large
backport with several series of patches, involving significant
refactoring, code movement and other code change. This makes it very
hard for us to be sure that our backport is correct, and that it's not
going to fail unexpect
Verified on Xenial and Zesty.
** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty
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Title:
Neighbour c
tdev@vger.kernel.org/msg138762.html
[1]: https://www.spinics.net/lists/linux-rdma/msg45907.html
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
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Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Daniel Axtens (daxtens)
Status: Confirmed
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Title:
bnx2x_attn_
** Description changed:
+ [SRU Justification]
+
+ [Impact]
+ System OOPSes shortly after boot when KVM guests are started.
+
+ [Fix]
+ Cherry-pick patch e47057151422a67ce08747176fa21cb3b526a2c9
+
+ [Testcase]
+ Tested at IBM - boot a machine with a KVM guest configured to start at boot.
Withou
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Daniel Axtens (daxtens)
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https://bugs.launchpad.net/bugs/1714420
Title:
kernel oops - kvm guest started
** Description changed:
The Dell PERC H740 series RAID controllers, codename "Harpoon", are not
supported in standard Ubuntu kernels.
- The kernel patch to support these new devices is:
+ There is a series of kernel patches required to support these:
+ http://www.mail-archive.com/linux-kern
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Released
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https://bugs.launchpad.net/bugs/1687512
Title:
Kernel panics on Xenial when using cgroups and strict C
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1699627
Title:
XDP eBPF programs fail to verify on Zesty ppc64el
Hi Edward,
I am glad to hear the modified ISO works. I have backported the
patches and am in discussions with the kernel team about including
them in the default kernel.
One of our issues is that the patch set is quite large so we're
worried about regressions - do you have any older H7** raid
con
Hi Marzog,
What commit has been committed to Linux? I cannot find it.
Regards,
Daniel
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https://bugs.launchpad.net/bugs/1701297
Title:
NTP reload failure (unable to read l
Hi,
We currently have a user testing the patches for Xenial onwards.
Regards,
Daniel
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https://bugs.launchpad.net/bugs/1683587
Title:
LSI Harpoon support in megaraid_sas m
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1698706
Title:
Quirk for non-compliant PCI bridge on HiSilicon D05 board
Status in linux package in Ubuntu:
Also verified by an IBMer on a real P8.
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https://bugs.launchpad.net/bugs/1699627
Title:
XDP eBPF programs fail to verify on Zesty ppc64el
Status in linux package in Ubuntu
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