All our Lucid 2.6 and 3.0 kernels hang with heavy memory loads
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux-lts-backport-oneiric (Ubuntu) |
Invalid
|
Undecided
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Unassigned |
Bug Description
The purpose of this bug is to report/emphasize the severe number of system hangs, which require power-cycling, on our deployment of servers running the 10.04LTS (Lucid) release. The issue here is essentially identical to that reported for the 3.2 kernels on 12.04LTS in bug #1154876 at https:/
The kernel version which fails for us in the field is a 2.6.38-16 Ubuntu kernel. Though the power-cycling recovery in the field means we never received a crash dump for analysis we've been able to reproduce what appears to be the identical symptoms on an in-house VMware testbed. The exact same failure as the other bug also occurs in our testbed on Lucid using the very latest stock 3.0.0-32-generic kernel from the repository.
See the other bug for details of scripts/loads and details of a kdb session during the hang. I didn't reproduce all those attachments for this bug report since everything for this version of the system would be similar. Essentially all processes remain "stuck" in __alloc_
Before the hangs even occur we will also see very heavy pgscank and pgscand numbers, as reported by the "sar" facility. On our production machines these can each hit millions of page scans per second and seem to occur even when there are several gigabytes of available memory. The system hangs are invariably immediately preceded by exceptionally high levels of pgscank and usually pgscand as well.
We really need a remedy or some kind of workaround for this issue.
Requested system release info:
marc@direct-
Description: Ubuntu 10.04.4 LTS
Release: 10.04
Requested package info:
marc@direct-
ii linux-image-
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.0.0-32-generic x86_64
Architecture: amd64
Date: Wed Mar 27 20:45:58 2013
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110719.2)
ProcEnviron:
PATH=(custom, no user)
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: linux-lts-
That version is no more supported; and backport is not expected as its not a 'security' problem