Difference between revisions of "Panic"
From OpenZFS on OS X
(panic) |
m |
||
Line 25: | Line 25: | ||
Kernel Extensions in backtrace: | Kernel Extensions in backtrace: | ||
− | net.lundman.spl(1.0)[7F69C13B-C730-3475-99E9-53861AC6C54E]@ | + | net.lundman.spl(1.0)[7F69C13B-C730-3475-99E9-53861AC6C54E]@0xffffff7f85d2a000->0xffffff7f85d36fff |
net.lundman.zfs(1.0)[5637421D-EE17-33F1-ACB2-8FA38BC5A5A6]@'''0xffffff7f80d54000'''->0xffffff7f85f38fff | net.lundman.zfs(1.0)[5637421D-EE17-33F1-ACB2-8FA38BC5A5A6]@'''0xffffff7f80d54000'''->0xffffff7f85f38fff | ||
We can then run the command | We can then run the command | ||
− | # xcrun '''atos''' -arch '''x86_64''' -o ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs | + | # xcrun '''atos''' -arch '''x86_64''' -l '''0xffffff7f80d54000''' -o ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs '''0xffffff7f80dcf760 0xffffff7f80dcf423 0xffffff7f80dc491a''' |
got symbolicator for ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs, base address 0 | got symbolicator for ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs, base address 0 | ||
spa_taskqs_init (in zfs) (spa.c:888) | spa_taskqs_init (in zfs) (spa.c:888) | ||
spa_create_zio_taskqs (in zfs) (spa.c:972) | spa_create_zio_taskqs (in zfs) (spa.c:972) | ||
spa_activate (in zfs) (spa.c:1094) | spa_activate (in zfs) (spa.c:1094) | ||
+ | |||
+ | Which can be repeated for spl, and spl load address as well, if needed. |
Revision as of 01:31, 17 March 2014
Kernel panics
One of the most useful settings to assist with debugging is telling Darwin kernel to keep the symbols from kexts. This can be set using the nvram command, and requires a reboot.
First check to see if you have any special boot-args set and add the new keepsyms instruction.
# nvram boot-args="keepsyms=y"
and reboot the machine for it to take effect.
Panic decoding
If you get a panic but you do not have symbols enabled, it can be decoded using the atos command.
In a standard panic log, you will see something like:
# cd /Library/Logs/DiagnosticReports/ # less Kernel_2014-03-13-093629_OSX109.panic Backtrace (CPU 0), Frame : Return Address 0xffffff8088843b10 : 0xffffff7f85e25759 : 0xffffff7f80dcf760 0xffffff8088843b40 : 0xffffff7f85e25560 : 0xffffff7f80dcf423 0xffffff8088843be0 : 0xffffff7f85e08f27 : 0xffffff7f80dc491a Kernel Extensions in backtrace: net.lundman.spl(1.0)[7F69C13B-C730-3475-99E9-53861AC6C54E]@0xffffff7f85d2a000->0xffffff7f85d36fff net.lundman.zfs(1.0)[5637421D-EE17-33F1-ACB2-8FA38BC5A5A6]@0xffffff7f80d54000->0xffffff7f85f38fff
We can then run the command
# xcrun atos -arch x86_64 -l 0xffffff7f80d54000 -o ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs 0xffffff7f80dcf760 0xffffff7f80dcf423 0xffffff7f80dc491a got symbolicator for ../zfs/module/zfs/zfs.kext/Contents/MacOS/zfs, base address 0 spa_taskqs_init (in zfs) (spa.c:888) spa_create_zio_taskqs (in zfs) (spa.c:972) spa_activate (in zfs) (spa.c:1094)
Which can be repeated for spl, and spl load address as well, if needed.