#2993 PMR29175 /proc missing on diskless nodes - HASN

PMR (72)

ECM Service Ping
From: Ping Li/Poughkeepsie/IBM
To: Lissa Valletta/Poughkeepsie/IBM@IBMUS
Cc: Norman Nott/Poughkeepsie/IBM@IBMUS, Linda Mellor/Poughkeepsie/IBM@IBMUS
Date: 07/20/2012 02:27 PM
Subject: PMR29175 /proc missing on diskless sys


ECMWF Alex Wood report /proc missing on all diskless node.
I found old mail for this [ xcat-Bugs-3397226 ] /Proc filesystem is not created on AIX diskless node, it was fixed on 2.6.7, but I could not find 3397226 bugs.
Customer saw it again on 2.7.2 ?

Problem Details
Product or Service: eXtreme Cloud Administrative Toolkit on AIX 2.7.2
Component ID: 5724V6301
Operating System: AIX
Problem title
C2T: Missing /proc filesystem
Problem description
System Model: 9125-F2C
Operating System: AIX V7.1
2xP7-775 HFI Topology: 8D_SDSN
HMC: V7R7.3.0 SP4 (Build lvl 20120514.1)
AIX: 7100-01-03-1207, xCAT: 2.7.2, GPFS, LL
PPE:, xlf: v13.1.0.5

A user recently reported they were unable to run procstack against a
process, got error:

procstack 3932398

fopen: No such file or directory
procstack: 3932398 is not a process

Tracked this down to node not having /proc filesystem mounted. Further
investigation reavealed that all our diskless nodes are missing the
/proc entry in /etc/filesystems, however if I check the image on the
EMS it is there:

xdsh -i ec_c_p5_v1 "grep -p proc /etc/filesystems"

ec_c_p5_v1: /proc:
ec_c_p5_v1: dev = /proc
ec_c_p5_v1: vol = "/proc"
ec_c_p5_v1: mount = true
ec_c_p5_v1: check = false
ec_c_p5_v1: free = false
ec_c_p5_v1: vfs = procfs

Issue exists on both clusters that have been upgraded to HPC SP5.1
(xCAT 2.7.2) in both storage and compute images. Also checked with HPC
test team, they see the same issue.


  • Lissa Valletta

    Lissa Valletta - 2012-07-23

    Reassigning to the develoer that fixed the original defect .

  • Norm Nott

    Norm Nott - 2012-07-23

    The support for the /proc filesystem is contained in the mkdsklsnode command. The command updates the /etc/filesystems file that will be used when the node is booted. Unfortunately this block of code was missed when adding the support for HASN.

    I'll add it to the HASN flow.

  • Lissa Valletta

    Lissa Valletta - 2012-07-24

    Norm is working on an efix

  • Norm Nott

    Norm Nott - 2012-07-24

    Added /proc setup to hasn flow in mkdsklsnode

    File: aixinstall.pm
    2.7.4 - rev 13342.
    2.8 - rev 13343.

    The ifix version of the file for 2.7.2 is attached below.

    Note: This file includes the changes for ifix SF3526650!

  • Norm Nott

    Norm Nott - 2012-07-24

    This is the gzip'd source file - not the ifix package.

  • Norm Nott

    Norm Nott - 2012-07-24

    tar file containing SF3547581.120724.epkg.Z and README

  • Lissa Valletta

    Lissa Valletta - 2012-10-19
    • status: pending --> closed
  • Lissa Valletta

    Lissa Valletta - 2012-10-19

    Checked PMR database it is closed


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