possible stack overflow?

[Jonathan Grymes]

All,
Had an issue with a server (snippet from the syslog is attached). Is there a way to determine what caused this issue? Basically locked the system up.

System is an HP Integrity rx2620. 1 processor

Sep 28 19:10:02 fgexsh41 vmunix: Deferred swap reservation failure pid: 22658
Sep 28 19:10:02 fgexsh41 vmunix:
Sep 28 19:10:02 fgexsh41 vmunix: Pid 22658 was killed due to failure in writing the signal context- possible stack overflow.
Sep 28 19:10:02 fgexsh41 vmunix: Deferred swap reservation failure pid: 22658
Sep 28 19:22:33 fgexsh41 vmunix: Warning: Ignoring setuid/setgid bit on "/h/EC/progs/debx_env_launch" as the system tunable "secure_sid_scripts" is s
et.
Sep 28 19:27:17 fgexsh41 vmunix: Deferred swap reservation failure pid: 23914
Sep 28 19:27:17 fgexsh41 vmunix:
Sep 28 19:27:17 fgexsh41 vmunix: Pid 23914 was killed due to failure in writing the signal context- possible stack overflow.
Sep 28 19:27:17 fgexsh41 vmunix: Deferred swap reservation failure pid: 23914
Sep 28 19:33:34 fgexsh41 above message repeats 2 times
Sep 28 19:38:00 fgexsh41 syslog: clnt_dg_create: out of memory
Sep 28 19:51:28 fgexsh41 vmunix: Deferred swap reservation failure pid: 26610
Sep 28 19:51:28 fgexsh41 vmunix:
Sep 28 19:51:28 fgexsh41 vmunix: Pid 26610 was killed due to failure in writing the signal context- possible stack overflow.
Sep 28 19:51:28 fgexsh41 vmunix: Deferred swap reservation failure pid: 26610
Sep 28 19:59:39 fgexsh41 vmunix: Deferred swap reservation failure pid: 27676
Sep 28 20:04:44 fgexsh41 vmunix: Warning: Ignoring setuid/setgid bit on "/h/EC/progs/debx_env_launch" as the system tunable "secure_sid_scripts" is s
et.
Sep 28 20:04:45 fgexsh41 vmunix: Deferred swap reservation failure pid: 27864

[Patrick Wallek · Accepted solution]

Basically the system could not reserve any swap space for new processes because none was available.

How much RAM does the system have? Please post the output of 'swapinfo -tam'.

[Jonathan Grymes]

# swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 4096 856 3240 21% 0 - 1 /dev/vg00/lvol2
reserve - 1961 -1961
memory 2028 1509 519 74%
total 6124 4326 1798 71% - 0 -
#

[Dennis Handly]

You could have a recursive stack overflow due to coding mistakes.

But all of the other errors makes it look like you are out of swap when it happens.
Add more memory or swap.

[Dennis Handly]

>And more memory or swap.

If not obvious, I should have said: Add more memory or swap.