This bug was fixed in the package linux - 4.15.0-39.42
---------------
linux (4.15.0-39.42) bionic; urgency=medium
* linux: 4.15.0-39.42 -proposed tracker (LP: #1799411)
* Linux: insufficient shootdown for paging-structure caches (LP: #1798897)
- mm: move tlb_table_flush to tlb_flush_mmu_free
- mm/tlb: Remove tlb_remove_table() non-concurrent condition
- mm/tlb, x86/mm: Support invalidating TLB caches for RCU_TABLE_FREE
- [Config] CONFIG_HAVE_RCU_TABLE_INVALIDATE=y
* Ubuntu18.04: GPU total memory is reduced (LP: #1792102)
- Revert "powerpc/powernv: Increase memory block size to 1GB on radix"
* arm64: snapdragon: reduce boot noise (LP: #1797154)
- [Config] arm64: snapdragon: DRM_MSM=m
- [Config] arm64: snapdragon: SND*=m
- [Config] arm64: snapdragon: disable ARM_SDE_INTERFACE
- [Config] arm64: snapdragon: disable DRM_I2C_ADV7511_CEC
- [Config] arm64: snapdragon: disable VIDEO_ADV7511, VIDEO_COBALT
* [Bionic] CPPC bug fixes (LP: #1796949)
- ACPI / CPPC: Update all pr_(debug/err) messages to log the susbspace id
- cpufreq: CPPC: Don't set transition_latency
- ACPI / CPPC: Fix invalid PCC channel status errors
* regression in 'ip --family bridge neigh' since linux v4.12 (LP: #1796748)
- rtnetlink: fix rtnl_fdb_dump() for ndmsg header
* screen displays abnormally on the lenovo M715 with the AMD GPU (Radeon Vega
8 Mobile, rev ca, 1002:15dd) (LP: #1796786)
- drm/amd/display: Fix takover from VGA mode
- drm/amd/display: early return if not in vga mode in disable_vga
- drm/amd/display: Refine disable VGA
* arm64: snapdragon: WARNING: CPU: 0 PID: 1 arch/arm64/kernel/setup.c:271
reserve_memblock_reserved_regions (LP: #1797139)
- SAUCE: arm64: Fix /proc/iomem for reserved but not memory regions
* The front MIC can't work on the Lenovo M715 (LP: #1797292)
- ALSA: hda/realtek - Fix the problem of the front MIC on the Lenovo M715
* Keyboard backlight sysfs sometimes is missing on Dell laptops (LP: #1797304)
- platform/x86: dell-smbios: Correct some style warnings
- platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
- platform/x86: dell-smbios: Link all dell-smbios-* modules together
- [Config] CONFIG_DELL_SMBIOS_SMM=y, CONFIG_DELL_SMBIOS_WMI=y
* rpi3b+: ethernet not working (LP: #1797406)
- lan78xx: Don't reset the interface on open
* 87cdf3148b11 was never backported to 4.15 (LP: #1795653)
- xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto
* [Ubuntu18.04][Power9][DD2.2]package installation segfaults inside debian
chroot env in P9 KVM guest with HTM enabled (kvm) (LP: #1792501)
- KVM: PPC: Book3S HV: Fix guest r11 corruption with POWER9 TM workarounds
* Provide mode where all vCPUs on a core must be the same VM (LP: #1792957)
- KVM: PPC: Book3S HV: Provide mode where all vCPUs on a core must be the
same
VM
* fscache: bad refcounting in fscache_op_complete leads to OOPS (LP: #1797314)
- SAUCE: fscache: Fix race in decrementing refcount of op->npages
* CVE-2018-9363
- Bluetooth: hidp: buffer overflow in hidp_process_report
* CVE-2017-13168
- scsi: sg: mitigate read/write abuse
* [Bionic] ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID
is set (LP: #1797200)
- ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
* [Bionic] arm64: topology: Avoid checking numa mask for scheduler MC
selection (LP: #1797202)
- arm64: topology: Avoid checking numa mask for scheduler MC selection
* crypto/vmx - Backport of Fix sleep-in-atomic bugs patch for 18.04
(LP: #1790832)
- crypto: vmx - Fix sleep-in-atomic bugs
* hns3: autoneg settings get lost on down/up (LP: #1797654)
- net: hns3: Fix for information of phydev lost problem when down/up
* not able to unwind the stack from within __kernel_clock_gettime in the Linux
vDSO (LP: #1797963)
- powerpc/vdso: Correct call frame information
* Signal 7 error when running GPFS tracing in cluster (LP: #1792195)
- powerpc/mm/books3s: Add new pte bit to mark pte temporarily invalid.
- powerpc/mm/radix: Only need the Nest MMU workaround for R -> RW transition
* Support Edge Gateway's WIFI LED (LP: #1798330)
- SAUCE: mwifiex: Switch WiFi LED state according to the device status
* Support Edge Gateway's Bluetooth LED (LP: #1798332)
- SAUCE: Bluetooth: Support for LED on Edge Gateways
* USB cardreader (0bda:0328) make the system can't enter s3 or hang
(LP: #1798328)
- usb: Don't disable Latency tolerance Messaging (LTM) before port reset
* CVE-2018-15471
- xen-netback: fix input validation in xenvif_set_hash_mapping()
* CVE-2018-16658
- cdrom: Fix info leak/OOB read in cdrom_ioctl_drive_status
* [Bionic] Update ThunderX2 implementation defined pmu core events
(LP: #1796904)
- perf vendor events arm64: Update ThunderX2 implementation defined pmu core
events
* the machine of lenovo M715 with the AMD GPU (Radeon Vega 8 Mobile, rev ca,
1002:15dd) often hangs randomly (LP: #1796789)
- drm/amd: Add missing fields in atom_integrated_system_info_v1_11
* [18.04] GLK hang after a while (LP: #1760545)
- drm/i915/glk: Add MODULE_FIRMWARE for Geminilake
* Fix usbcore.quirks when used at boot (LP: #1795784)
- usb: core: safely deal with the dynamic quirk lists
-- Kleber Sacilotto de Souza <[email protected]> Tue, 23 Oct
2018 14:44:55 +0000
** Changed in: linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-13168
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-15471
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-16658
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-9363
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https://bugs.launchpad.net/bugs/1792102
Title:
Ubuntu18.04: GPU total memory is reduced
Status in The Ubuntu-power-systems project:
Fix Committed
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
Fix Released
Bug description:
== SRU Justification ==
Due to a recent change for powernv, now the total GPU memory is no longer
available. This impacts performance for any application/benchmark has a
large GPU memory utilization.
IBM is requesting mainlien commit 7acf50e4efa6 in Bionic, which reverts
mainline commit 4b5d62ca17a1.
== Fix ==
7acf50e4efa6 ("Revert "powerpc/powernv: Increase memory block size to 1GB on
radix"")
== Regression Potential ==
Low. This is a revert that was also done upstream due to a regression.
Limited to powerpc.
== Test Case ==
A test kernel was built with this patch and tested by the original bug
reporter.
The bug reporter states the test kernel resolved the bug.
== Comment: #0 - Michael Ranweiler <[email protected]> - 2018-09-10
19:26:14 ==
Due to a recent change for powernv, now the total GPU memory is no
longer available. This impacts performance for any
application/benchmark has a large GPU memory utilization.
Previous amount of memory : 16128MiB
Current amount of available memory : 15360MiB
From Anton, describing the recent change.:
powerpc/powernv: Increase memory block size to 1GB on radix
Memory hot unplug on PowerNV radix hosts is broken. Our memory block
size is 256MB but since we map the linear region with very large
pages, each pte we tear down maps 1GB.
A hot unplug of one 256MB memory block results in 768MB of memory
getting unintentionally unmapped. At this point we are likely to oops.
Fix this by increasing our memory block size to 1GB on PowerNV radix
hosts.
Fixes: 4b5d62ca17a1 ("powerpc/mm: add
radix__remove_section_mapping()")
This is fixed with:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7acf50e4efa6
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1792102/+subscriptions
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