[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
This bug is also affecting us. We're on Xenial but use this kernel for HWE. Basically for our monitoring, the leader to all this shows as dirty memory and or filesystem writeback. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
I have also been running 4.15.0-144-generic for three weeks so far without the issue occurring. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
John - thanks for finding ==> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926081 There is a great testing work done there. For this thread I have been running kernel 4.15.0-144-generic for the last 3 weeks and haven't seen the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
I note it is possible this is a duplicate of https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1926081 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
We were directed to this bug by our Portworx support team, and believe we're seeing the same thing. We are running Ubuntu 16.04 with the hardware enablement kernel. Most of our nodes are running 4.15.0-140, and like Peter notes above, the I/O performance problem does not show up right away, but takes a few days to appear. When it gets bad, we see exactly the same behavior when looking at `iotop`, where any processes doing more than trivial I/O show as 99.9% IOWAIT time. The system performs sluggishly (notably the container runtime) and a reboot "fixes" the problem. Our strategy at the moment is roll back to the -136 kernel on all of our bare metal Kubernetes nodes, and hopefully get upgraded to Ubuntu 20.04 by the end of the year. If any further testing is requested please let us know and we can try things out on our dev systems. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi! We are running some large (100+) kubernetes clusters on bare metal machines also running a LSI MegaRAID controller and we are experiencing these exact problems since about a week (cluster being in production since early june). We run with this controller: # lspci | grep -i mega 59:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID Tri-Mode SAS3516 (rev 01) After being in operation and taking production traffic (we are very IO intense) for less month both clusters started behaving weirdly with timeouts between processes on different nodes. After much debugging we found that basically IO performance had ground to a halt. Here is a quick summary of what we found together with our external partner (developer of our software defined storage solution): We analyzed a small subset of nodes encountering the issue. Based on our initial diagnosis, here are the findings: - The CPU and IO utilization were low but all systems reported high load averages. - All disks looked fine - root and data disks. The IO load was very small with no visible spikes in latencies. None of the devices were unresponsive/stuck. - All user space processes looked fine, none were blocked. - The systems were slow in general. i.e. Installing packages and writing even to the root disk was very slow. - A kernel thread dump showed a lot of them in D state, all stuck on writing to the page cache. - We used dd to write a small 1M file on the host (NOT on px device), requiring no disk io and it showed the same symptoms. - System dirty threshold settings do not show anything out of the ordinary. - All the affected nodes another common symptom is that the page cache drain appeared to be slow/stuck. Amount of pages in the writeback list is high but no writeback appeared to be happening. These clusters all run a 18.04 LTS but have different kernels depending on their patch level: Cluster A: 228 4.15.0-140-generic 74 4.15.0-142-generic 7 4.15.0-143-generic Cluster B: 418 4.15.0-136-generic 22 4.15.0-144-generic 12 4.15.0-143-generic 9 4.15.0-142-generic Cluster A is the one with the worst performance. Cluster B have had similar problems but since the majority of the nodes are on 136 it has not been so badly hit. Our only remedy for now have been to downgrade to 136 and/or rebooting the machines. Rebooting the machines but staying on the problematic kernel works for now, but most likely we will see the same behavior in a week or so of taking production traffic. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hey, We experienced the performance issue on different hardware servers: LENOVO System x3650 M5 Lenovo ThinkSystem SR650 with the following kernels: 4.15.0-137-generic: disk performance issue 4.15.0-139-generic: disk performance issue 4.15.0-140-generic: disk performance issue 4.15.0-142-generic: disk performance issue I haven't seen this issue on virtual machines (VMware VMs Ubuntu 18/20). At the moment, I'm testing "4.15.0-144-generic". To early to say it is free of the bug - I will come back in a week. Thanks Mariusz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi, We think we are affected by the same bug. We were on version 4.15.0-139 and upgraded to 144 before finding this post. Is there any confirmation that this issue also occurs in 4.15.0-144? I have have installed version 4.15.0-136 in the meantime to allow us to reboot and select that kernel, incase the issue is present. Hope to see a fix for this issue soon. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: linux (Ubuntu Bionic) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi Khaled, I have finished testing the kernels - it took more time than I expected but the results are: 4.15.0-136-generic: no issues 4.15.0-137-generic: disk performance issue 4.15.0-139-generic: disk performance issue 4.15.0-140-generic: disk performance issue 4.15.0-142-generic: disk performance issue Each kernel was running for minimum 7 days. Those which have disk performance issue start to break after few days of normal workload. Here is an example of "iotop -a", when our disk operations are throttled: Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO>COMMAND 10908 be/4 barman0.00 B144.00 K 0.00 % 99.99 % pg_receivewal --dbname=dbname=replication host=XX replication=~o-password --directory=/data/barman/X/streaming --slot=barman 9494 be/4 barman0.00 B144.00 K 0.00 % 99.99 % rsync --server -logDtpre.iLsfxC . /data/barman/XX/incoming/0001318300ED 10907 be/4 barman0.00 B144.00 K 0.00 % 99.99 % pg_receivewal --dbname=dbname=replication host=XX replication~-password --directory=/data/barman/XXX/streaming --slot=barman 7148 be/4 barman0.00 B144.00 K 0.00 % 99.99 % rsync --server -logDtpre.iLsfxC . /data/barman/XX/incoming/0001D2E90043 11144 be/4 barman0.00 B144.00 K 0.00 % 99.99 % pg_receivewal --dbname=dbname=replication host=X replication=~o-password --directory=/data/barman/X/streaming --slot=barman 17724 be/3 root 0.00 B 8.00 K 0.00 % 99.99 % auditd 11217 be/4 root 0.00 B 8.00 K 0.00 % 99.99 % syslog-ng -F 10003 be/4 barman0.00 B 96.00 K 0.00 % 99.99 % gpg -e -r BarmanBackup 10219 be/4 barman0.00 B 96.00 K 0.00 % 99.99 % gpg -e -r BarmanBackup 9247 be/4 barman0.00 B140.00 K 0.00 % 98.62 % rsync --server -logDtpre.iLsfxC . /data/barman/mel-attn-hostdb/incoming/00014CE00083 11391 be/4 barman0.00 B140.00 K 0.00 % 98.60 % pg_receivewal --dbname=dbname=replication host=XXX replication=~o-password --directory=/data/barmanXXX/streaming --slot=barman 9556 be/4 barman0.00 B 92.00 K 0.00 % 98.53 % gpg -e -r BarmanBackup 4381 be/4 root 0.00 B 8.00 K 0.00 % 57.53 % sadc -F -L -S DISK 60 /var/log/sysstat 10959 be/4 root 0.00 B 4.00 K 0.00 % 26.29 % sadc -F -L -S DISK 60 /var/log/sysstat 15626 be/4 root 0.00 B 4.00 K 0.00 % 8.22 % sadc -F -L -S DISK 60 /var/log/sysstat So, I think it is ok to say that the problem was introduced with 4.15.0-137-generic. We will try to see the latest kernel in our next patching window. However, based on the fact that kernels 137,139,140,142 are not working correctly, could this be related to some tuning changes? In our case, we haven't done any changes to e.g. sysctl after patching. Many thanks for your help so far! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Thanks for the extensive testing, Mariusz. (I assume -137 doesn't have the performance problem?) So, for comment #9 - the difference in loaded modules comes down to 20 additional modules that were loaded when performance was bad: -ip6_tables 28672 0 -iptable_filter 16384 0 -ip_tables 28672 1 iptable_filter -x_tables 40960 3 iptable_filter,ip6_tables,ip_tables -tcp_diag 16384 0 -udp_diag 16384 0 -inet_diag 24576 2 tcp_diag,udp_diag -cpuid 16384 0 -btrfs 1155072 0 -zstd_compress 163840 1 btrfs -xor 24576 1 btrfs -raid6_pq 114688 1 btrfs -ufs 77824 0 -qnx4 16384 0 -minix 32768 0 -ntfs 102400 0 -msdos 20480 0 -jfs 188416 0 -xfs 1204224 0 -libcrc32c 16384 1 xfs Seems they are mostly filesystem modules and iptables modules. It is possible that this could affect performance - though unlikely to cause performance issues simply by them being loaded. If they are causing the performance hit it would probably mean that some thing else is running not just additional modules loaded in memory. So, if I understand correctly, -140 seemed initially fine, but after some time, performance degrades. That makes things a bit more interesting. Do you see those additional modules loaded when performance is degraded? Note that all those additional modules don't seem to have any external dependencies other than themselves - they depend only on each other. So it should be easily possible to unload them and see if that "fixes" the performance issue. By the way, kernels -143 and -144 have been released since this bug was created. Maybe it is worthwhile to also try those kernels? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi, I have done longer testing of kernel 140 and it has performance degradation issue as well. It took a couple of days to fully max out disk IOs on that kernel with the same load. Therefore, I came back to testing the other kernels in longer time-window. At the moment, I'm running kernel 4.15.0-137-generic. Will leave it running for the next few days to see if there is any difference. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi, In the last 3 days, I have been testing the other kernels. The steps which I took: 1. Boot to kernel-4.15.0-136. 2. Install kernel X, where X = 136,137,139,140: sudo apt-get install linux-image-4.15.0-X-generic linux-headers-4.15.0-X-generic linux-modules-4.15.0-X-generic linux-modules-extra-4.15.0-X-generic 3. Boot to kernel X. 4. Manually run: sudo depmod 5. Reboot. 4. Run the server's normal workload and see how it was performing. I haven't seen disk performance issues with those kernels. But there is one difference, which I don't know how to explain. Before I raised this bug, we had the same disk performance issues on kernel-4.15.0-140. I collected the list of kernel modules running on that kernel at that time: Module Size Used by joydev 24576 0 input_leds 16384 0 hid_generic16384 0 usbhid 49152 0 hid 122880 2 usbhid,hid_generic ip6_tables 28672 0 iptable_filter 16384 0 ip_tables 28672 1 iptable_filter x_tables 40960 3 iptable_filter,ip6_tables,ip_tables tcp_diag 16384 0 udp_diag 16384 0 inet_diag 24576 2 tcp_diag,udp_diag cpuid 16384 0 btrfs1155072 0 zstd_compress 163840 1 btrfs xor24576 1 btrfs raid6_pq 114688 1 btrfs ufs77824 0 qnx4 16384 0 minix 32768 0 ntfs 102400 0 msdos 20480 0 jfs 188416 0 xfs 1204224 0 libcrc32c 16384 1 xfs intel_rapl 20480 0 sb_edac24576 0 x86_pkg_temp_thermal16384 0 intel_powerclamp 16384 0 coretemp 16384 0 kvm_intel 217088 0 kvm 614400 1 kvm_intel ipmi_ssif 32768 0 irqbypass 16384 1 kvm crct10dif_pclmul 16384 0 crc32_pclmul 16384 0 ghash_clmulni_intel16384 0 pcbc 16384 0 aesni_intel 188416 0 aes_x86_64 20480 1 aesni_intel cdc_ether 16384 0 usbnet 45056 1 cdc_ether mii16384 1 usbnet crypto_simd16384 1 aesni_intel glue_helper16384 1 aesni_intel cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel intel_cstate 20480 0 intel_rapl_perf16384 0 ipmi_si57344 0 ipmi_devintf 20480 0 ipmi_msghandler53248 3 ipmi_devintf,ipmi_si,ipmi_ssif shpchp 36864 0 mei_me 40960 0 mei94208 1 mei_me lpc_ich24576 0 acpi_power_meter 20480 0 acpi_pad 180224 0 mac_hid16384 0 bonding 163840 0 lp 20480 0 parport49152 1 lp autofs440960 2 mgag20045056 1 i2c_algo_bit 16384 1 mgag200 ttm 106496 1 mgag200 drm_kms_helper172032 1 mgag200 syscopyarea16384 1 drm_kms_helper sysfillrect16384 1 drm_kms_helper tg3 167936 0 sysimgblt 16384 1 drm_kms_helper fb_sys_fops16384 1 drm_kms_helper ptp20480 1 tg3 drm 401408 4 drm_kms_helper,mgag200,ttm pps_core 20480 1 ptp megaraid_sas 143360 12 mxm_wmi16384 0 wmi24576 1 mxm_wmi Now, after the testing we are running on kernel-4.15.0-140 (again) and this time I don't see the issue. But the list of kernel module is different: lsmod Module Size Used by intel_rapl 20480 0 sb_edac24576 0 x86_pkg_temp_thermal16384 0 intel_powerclamp 16384 0 coretemp 16384 0 kvm_intel 217088 0 ipmi_ssif 32768 0 kvm 614400 1 kvm_intel irqbypass 16384 1 kvm crct10dif_pclmul 16384 0 crc32_pclmul 16384 0 ghash_clmulni_intel16384 0 pcbc 16384 0 aesni_intel 188416 0 aes_x86_64 20480 1 aesni_intel crypto_simd16384 1 aesni_intel glue_helper16384 1 aesni_intel cryptd 24576 3 crypto_simd,ghash_clmulni_intel,aesni_intel intel_cstate 20480 0 cdc_ether 16384 0 usbnet 45056 1 cdc_ether input_leds 16384 0 joydev 24576 0 mii16384 1 usbnet intel_rapl_perf16384 0 ipmi_si57344 0 ipmi_devintf 20480 0 ipmi_msghandler53248 3 ipmi_devintf,ipmi_si,ipmi_ssif mei_me 40960 0 mei94208 1 mei_me lpc_ich
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Cool cool, I will try to do what you have suggested - that make sense. Will get back once I have some details. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi @Mariusz - thank you for the bug report. That certainly sounds like a kernel bug based on your description. Doing a kernel bisect is probably the fastest approach to identifying the offending change. There are 392 changes between -136 and -142 so it could take up to 9 tests for a full bisect. @Mariusz, is it possible to find out which (if any) of the intermediate kernels between -136 and -142 are affected ? If you don't have any of the intermediate kernels installed already, you can install them with a command like this one: sudo apt-get install linux-image-4.15.0-137-generic linux- headers-4.15.0-137-generic linux-modules-4.15.0-137-generic linux- modules-extra-4.15.0-137-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Hi, I have done another test and compared the same server running on 4.15.0-136-generic and kernel 4.15.0-142-generic. Collected zabbix CPU utilization graph which is showing the problem from the performance point of view. On 4.15.0-136-generic, the server works normal and there are no processes stuck on 99% iowait. On 4.15.0-142-generic it is not working at all and rsync, pg_receivewal or dd processes are hanging with iowait 99%. I attached the zabbix graph to this bug. ** Attachment added: "kernel_issue.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+attachment/5498858/+files/kernel_issue.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Unable to run apport-collect 1928744 command. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
changed HWE to linux as I see no reference to a HWE (5.4) kernel ** Package changed: linux-signed-hwe (Ubuntu) => linux (Ubuntu) ** Tags added: bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Thanks a lot for coming back to me. I couldn't run apport-collect as we don't have python-launchpadlib installed. I did check (apt install python3-launchpadlib) and in my case it would install quite a lot of dependent packages - we would like to avoid that due to the nature of our server. But I did collect a bug report with "ubuntu-bug linux-image-generic" and attached to this case. Hope this will be helpful. ** Attachment added: "apport.linux-image-generic.zrvzpzar.apport" https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1928744/+attachment/5498602/+files/apport.linux-image-generic.zrvzpzar.apport -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal: apport-collect 1928744 When reporting bugs in the future please use apport by using 'ubuntu- bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs. Note: you may have issues with this, as you've changed the package to the HWE kernel (kernel 5.4 for 18.04) but your details imply you're using 18.04's GA kernel of 4.15 (Ubuntu 16.04 using HWE uses the 4.15 kernel) If you have issues; please change the package to 'linux' then try apport-collect again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1928744] Re: Disk IO very slow on kernel 4.15.0-142-generic
** Package changed: ubuntu => linux-signed-hwe (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1928744 Title: Disk IO very slow on kernel 4.15.0-142-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1928744/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
