[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
** Changed in: oem-priority Status: Fix Committed = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
This bug was fixed in the package linux - 2.6.38-11.48 --- linux (2.6.38-11.48) natty-proposed; urgency=low [Herton R. Krzesinski] * Release Tracking Bug - LP: #818175 [ Upstream Kernel Changes ] * Revert HID: magicmouse: ignore 'ivalid report id' while switching modes - LP: #814250 linux (2.6.38-11.47) natty-proposed; urgency=low [Steve Conklin] * Release Tracking Bug - LP: #811180 [ Keng-Yu Lin ] * SAUCE: Revert: dell-laptop: Toggle the unsupported hardware killswitch - LP: #775281 [ Ming Lei ] * SAUCE: fix yama_ptracer_del lockdep warning - LP: #791019 [ Stefan Bader ] * SAUCE: Re-enable RODATA for i386 virtual - LP: #809838 [ Tim Gardner ] * [Config] Add grub-efi as a recommended bootloader for server and generic - LP: #800910 * SAUCE: rtl8192se: Force a build for a 2.6/3.0 kernel - LP: #805494 [ Upstream Kernel Changes ] * Revert bridge: Forward reserved group addresses if !STP - LP: #793702 * Fix up ABI directory * bonding: Incorrect TX queue offset, CVE-2011-1581 - LP: #792312 - CVE-2011-1581 * fs/partitions/efi.c: corrupted GUID partition tables can cause kernel oops - LP: #795418 - CVE-2011-1577 * usbnet/cdc_ncm: add missing .reset_resume hook - LP: #793892 * ath5k: Disable fast channel switching by default - LP: #767192 * mm: vmscan: correctly check if reclaimer should schedule during shrink_slab - LP: #755066 * mm: vmscan: correct use of pgdat_balanced in sleeping_prematurely - LP: #755066 * ALSA: hda - Use LPIB for ATI/AMD chipsets as default - LP: #741825 * ALSA: hda - Enable snoop bit for AMD controllers - LP: #741825 * ALSA: hda - Enable sync_write workaround for AMD generically - LP: #741825 * cpuidle: menu: fixed wrapping timers at 4.294 seconds - LP: #774947 * drm/i915: Fix gen6 (SNB) missed BLT ring interrupts. - LP: #761065 * USB: ehci: remove structure packing from ehci_def - LP: #791552 * drm/i915: disable PCH ports if needed when disabling a CRTC - LP: #791752 * kmemleak: Do not return a pointer to an object that kmemleak did not get - LP: #793702 * kmemleak: Initialise kmemleak after debug_objects_mem_init() - LP: #793702 * Fix _OSC UUID in pcc-cpufreq - LP: #793702 * CPU hotplug, re-create sysfs directory and symlinks - LP: #793702 * Fix memory leak in cpufreq_stat - LP: #793702 * net: recvmmsg: Strip MSG_WAITFORONE when calling recvmsg - LP: #793702 * ftrace: Only update the function code on write to filter files - LP: #793702 * qla2xxx: Fix hang during driver unload when vport is active. - LP: #793702 * qla2xxx: Fix virtual port failing to login after chip reset. - LP: #793702 * qla2xxx: Fix vport delete hang when logins are outstanding. - LP: #793702 * powerpc/kdump64: Don't reference freed memory as pacas - LP: #793702 * powerpc/kexec: Fix memory corruption from unallocated slaves - LP: #793702 * x86, cpufeature: Fix cpuid leaf 7 feature detection - LP: #793702 * ath9k_hw: do noise floor calibration only on required chains - LP: #793702 * ath9k_hw: fix power for the HT40 duplicate frames - LP: #793702 * ath9k_hw: fix dual band assumption for XB113 - LP: #793702 * ath9k_hw: Fix STA connection issues with AR9380 (XB113). - LP: #793702 * powerpc: Set nr_cpu_ids early and use it to free PACAs - LP: #793702 * powerpc/oprofile: Handle events that raise an exception without overflowing - LP: #793702 * iwlagn: fix iwl_is_any_associated - LP: #793702 * block: rescan partitions on invalidated devices on -ENOMEDIA too - LP: #793702 * block: move bd_set_size() above rescan_partitions() in __blkdev_get() - LP: #793702 * paride: Convert to bdops-check_events() - LP: #793702 * gdrom,viocd: Convert to bdops-check_events() - LP: #793702 * ide: Convert to bdops-check_events() - LP: #793702 * block: don't block events on excl write for non-optical devices - LP: #793702 * block: Fix discard topology stacking and reporting - LP: #793702 * block: add proper state guards to __elv_next_request - LP: #793702 * block: always allocate genhd-ev if check_events is implemented - LP: #793702 * mtd: mtdconcat: fix NAND OOB write - LP: #793702 * mtd: return badblockbits back - LP: #793702 * x86, 64-bit: Fix copy_[to/from]_user() checks for the userspace address limit - LP: #793702 * ext4: fix possible use-after-free in ext4_remove_li_request() - LP: #793702 * iwlwifi: fix bugs in change_interface - LP: #793702 * nl80211: Fix set_key regression with some drivers - LP: #793702 * mac80211: fix a few RCU issues - LP: #793702 * wire up fanotify syscalls - LP: #793702 * wire up clock_adjtime syscall - LP: #793702 * drm: Send pending vblank events before disabling vblank.
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- natty' to 'verification-done-natty'. If verification is not done by one week from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-natty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
Just to make things a little more confusing, the patches in the bug got replaced by a better fix and these are being tracked in bug 808509 namely: SRU: Stop kswapd consuming 100% CPU when highest zone is small. I've tested the -proposed kernel and it addresses this bug (since it's essentially a manifestation of the same root bug). Testing as as follows: ~4 hours of running a script (see https://bugs.launchpad.net/ubuntu/+source/linux/+bug/808509/comments/7 ) giving 500 iterations of a copy loop that copies ~795MB of files from one ext4 partition to another. Exhaustive test passed. Without the fix the test would fail after a few tens of iterations. So I will mark this as verified. ** Tags added: natty-verification-done ** Tags removed: verification-needed-natty ** Tags added: verification-done-natty ** Tags removed: natty-verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
** Changed in: linux (Ubuntu Natty) Importance: Undecided = Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
** Summary changed: - heavy i/o on sandybridge systems with small memory footprints causes system hangs + Heavy I/O on Sandybridge systems with small memory footprints causes system hangs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
** Also affects: linux (Ubuntu Natty) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Status: In Progress = Fix Released ** Changed in: linux (Ubuntu Natty) Status: New = Fix Committed ** Changed in: linux (Ubuntu Natty) Assignee: (unassigned) = Colin King (colin-king) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs
** Changed in: oem-priority Status: Confirmed = Fix Committed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: Heavy I/O on Sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
SRU Request: System hangs have been observed when performing heavy I/O on sandybridge systems with small memory footprints (for example, less than 2GB of memory). kswapd consumes all the CPU and the machine effectively becomes unusable because kswapd is missing every cond_resched(). Also, we need to invert the logic in commit 1741c877 (mm: kswapd: keep kswapd awake for high-order allocations until a percentage of the node is balanced) to allow kswapd to go to sleep when balanced for high orders. Testing involved multiply copying ~600MB of files from an install image on a laptop with 2GB of memory. A 2.5 hour (150 iteration) soak test cannot trip the hang with these patches, where as without them the bug occurs in the first 5 to 30 iterations. Test Case: 600MB of files from Natty ISO image copied to a 1GB ext4 partition on /dev/sda3 and copied via the attached bash script to an ext4 partition on /dev/sda4. This script contains elements of the original ubiquity installer Python script that originally tripped the hang. Without the patches, system hangs after 5 to 30 iterations. kswapd chews up CPU and machine becomes unusable. with the patch, script can run for hours and hundreds of copy iterations. ** Attachment added: ubiquity.nousb.simple https://bugs.launchpad.net/ubuntu/+source/linux/+bug/755066/+attachment/2172614/+files/ubiquity.nousb.simple -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/755066/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
I have the same problem on a sandybridge XPS15 laptop with 4 GB ram. It almost exclusively happens when Dropbox is synchronizing files and it's very annoying. So I guess it's not just limited to devices with an low amount of memory. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
Update: I worked with upstream on a bunch of the patches for this issue and the good news is that we have two fixes that hit GregKH's stable 2.6.38.8 tree a few days ago: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.38.y.git;a=commit;h=2020aa625c559d371518040290b5476356e7aacf http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.38.y.git;a=commit;h=28663b64187171a869bf991b20e3dc24f88067d4 so hopefully these will be picked up on the Natty stable updates at some point in the future (a few weeks). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
Just to add, kudos to Minchan Kim, Johannes Weiner and Mel Gorman to name but a few on working on this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Changed in: oem-priority Assignee: Canonical Platform QA Team (canonical-platform-qa) = Chris Van Hoof (vanhoof) ** Changed in: oem-priority 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/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
Hello, I am experiencing a very similar problem with my laptop (AMD fusion based, HP Pavilion dm1-3101 - 4GB RAM, CPU AMD E350 dual core), a fresh Natty installation with updates and kernel 2.6.38-9-generic amd64. When trying to rsync a few GB directories from my main PC to the laptop, after a while (random) the laptop hangs. Nothing is displayed on screen and I cannot find any trace in the logs. After some hours (sic!) spent on this problem, I have noticed that: - The system hangs when free memory gets low (monitored with 'top' on a terminal). - As free memory decreases, kswapd0 starts consuming more and more cpu time, till it reaches 60%-80%. Swap is not used however, and I was able to reproduce the hang even with swap off. - As a workaround, I eventually found that dropping the disk caches when kswapd0 starts misbehaving (echo 1 /proc/sys/vm/drop_caches) prevents the kernel from freezing and, thanks to that, I could finally complete the rsync. Do you think this is the same problem, or should I open a new bug? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Changed in: linux (Ubuntu) Assignee: Chris Van Hoof (vanhoof) = Colin King (colin-king) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
Do your systems install Maverick fine? As I said, I was able to install Natty beta 2 and transfer lots of data (around 70GB) before it cracked. But now I am unable to reinstall Natty, Maverick or even Windows 7 retail (unfortunately I do not have a recovery cd). This was on a 5 hour old Thinkpad t420s. Tech support said the did not support Linux (obviously) and that it was normal that windows 7 cracked because it was the retail (not the OEM) version, but I think the guy just thought I did not know what I was doing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
I get the same problem, but not when installing. Copying a large amount of files, or importing a lot of photos them into shotwell also causes the system to hang. I have tried several of the mainline kernels as described in including: * http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2011-04-13-natty/ * http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.39-rc4-natty/ These kernels do not hang. The machine is a Dell 15R with 3G of RAM : http://www.dell.com/uk/p/inspiron-r/pd?p=inspiron-rview=pdetails Let me know if I can give any more information to help. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
I could install too, and copy a large amount of data until I got the first failure. From then, failures were frequent and easily reproducible (an rsync would fail in less than 5 minutes), giving me general protection fault. However I have been unable to reinstall from scratch again, the process now fails at different stages of the process, both with Natty beta 2 and with Maverick. So right now I am inclined to think my machine might be botched. It was a brand new Thinkpad t420s. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
changed state to In Progress so it doesn't scare me every time I look at the hot list. :) ~JFo ** Changed in: linux (Ubuntu) Status: New = In Progress -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
@Chris --- I wonder if we are getting an OOM or similar. It would be great if we could examine the dmesg when this is occuring. Perhaps configure a network console, or serial and see if we capture anything. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
@Chris, might also be useful to see /proc/meminfo and /proc/slabinfo in that state to get an idea of where all the memory is being used. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
@Seth here ya go: Full set of various commands, top, vmstat, iostat, mpstat, slabinfo, meminfo etc from the start of a test, to the point where I hang: http://people.canonical.com/~vanhoof/lazy_itable_init_testing_plus_dirty/debug/ --chris -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
Sorry, I don't think that information really tells us anything new. Lots of memory used for the page cache, which isn't surprising. slabinfo does show a large increase in the size of the buffer_head slab at the end, which indicates a lot of stuff waiting to undergo I/O, and again not surprising. Well, it was worth a try. I've seen systems that ground to a halt because of an in-kernel memory leak or similar creating enormous system- wide memory pressure. But that doesn't seem to be what's happening here unless something went horribly wrong after the logs stop. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
An update from today's testing: We went through the test case today, and began testing older kernel releases to see if we could find a bisection point. These tests were run on three different SandyBridge machines, with 1gb, 2gb, and 3gb of memory. All using a dual core chip. In any case where there was a failure, we hung 5 iterations through the reproducer. In any case where there was success we went beyond 20 (even 35) iterations. Using the Kernel Team's mainline builds from here: - http://kernel.ubuntu.com/~kernel-ppa/mainline/ Working: v2.6.37-natty v2.6.37.6-natty Failing:v2.6.38-rc1-natty We've even seen the same failure up to 2.6.39-rc3 There is ~8000 patches between 2.6.37 and 2.6.38-rc1, requiring 13 bisections from what I gather. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Also affects: oem-priority Importance: Undecided Status: New ** Changed in: oem-priority Importance: Undecided = Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Tags added: hwe-blocker -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Changed in: oem-priority Assignee: (unassigned) = Canonical Platform QA Team (canonical-platform-qa) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Changed in: linux (Ubuntu) Assignee: (unassigned) = Chris Van Hoof (vanhoof) ** Changed in: linux (Ubuntu) Importance: Undecided = Critical -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
I did some testing on this issue, and initially thought I had a culprit with mkfs.ext4: http://people.canonical.com/~vanhoof/lazy_itable_init_testing_plus_dirty/ However it has been proven to occur even with a more generic file copy operation. I was able to grab some perf top results today during an instance of this lockup: http://people.canonical.com/~vanhoof/lazy_itable_init_testing_plus_dirty/perftop/ Which does show a large spike in shrink_slab when this hits. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Attachment added: ubiquity2.sh https://bugs.launchpad.net/bugs/755066/+attachment/2002847/+files/ubiquity2.sh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Attachment added: uname.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/755066/+attachment/2002857/+files/uname.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 755066] Re: heavy i/o on sandybridge systems with small memory footprints causes system hangs
** Attachment added: version.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/755066/+attachment/2002858/+files/version.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/755066 Title: heavy i/o on sandybridge systems with small memory footprints causes system hangs -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
