Mini Core Dumps - Dell S4048T Configuration Manual

To undo this command, use the no logging coredump server command.

Mini Core Dumps

Dell Networking OS supports mini core dumps on the application and kernel crashes. The mini core dump
applies to Master, Standby, and Member units.
Application and kernel mini core dumps are always enabled. The mini core dumps contain the stack space
and some other minimal information that you can use to debug a crash. These files are small files and are
written into flash until space is exhausted. When the flash is full, the write process is stopped.
A mini core dump contains critical information in the event of a crash. Mini core dump files are located in
flash:/ (root dir). The application mini core filename format is f10StkUnit<Stack_unit_no>.<Application
name>.acore.mini.txt. The kernel mini core filename format is f10StkUnit<Stack_unit_no>.kcore.mini.txt. The
following are sample filenames.
When a member or standby unit crashes, the mini core file gets uploaded to master unit. When the master
unit crashes, the mini core file is uploaded to new master.
The panic string contains key information regarding the crash. Several panic string types exist, and they are
displayed in regular English text to enable easier understanding of the crash cause.
Example of Application Mini Core Dump Listings
Dell#dir flash:/CORE_DUMP_DIR
Directory of flash:/CORE_DUMP_DIR
1 drwx 4096
2 drwx 4096
3 drwx 4096
4 -rwx 512
flash: 2368282624 bytes total (2293637120 bytes free)
Example of a Mini Core Text File
VALID MAGIC
-----------------PANIC STRING -----------------
panic string is :<null>
---------------STACK TRACE START---------------
0035d60c <f10_save_mmu+0x120>:
00274f8c <panic+0x144>:
0024e2b0 <db_fncall+0x134>:
0024dee8 <db_command+0x258>:
0024d9c4 <db_command_loop+0xc4>:
002522b0 <db_trap+0x158>:
0026a8d0 <mi_switch+0x1b0>:
0026a00c <bpendtsleep>:
----------------STACK TRACE END----------------
--------------------FREE MEMORY---------------
uvmexp.free = 0x2312
Jan 07 2015 13:25:04 +00:00 .
Jan 01 1980 00:00:00 +00:00 ..
Jan 07 2015 13:25:04 +00:00 FTP_STK_MEMBER
May 11 2015 20:54:24 +00:00 f10StkUnit.kcore.mini.txt
Debugging and Diagnostics 1261