Messages in this thread | | | From | Andi Kleen <> | Subject | Re: 2.6.19-rc5: known regressions (v3) | Date | Wed, 15 Nov 2006 11:50:10 +0100 |
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> On a working kernel on an Opteron, we have normally 4 directories > in /dev/oprofile : > > # ls -ld /dev/oprofile/? > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/0 > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/1 > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/2 > drwxr-xr-x 1 root root 0 15. Nov 12:38 /dev/oprofile/3 > > With linux-2.6.19-rc5, the first one (0) is missing and we get 1,2,3
That's because 0 was never available. It is used by the NMI watchdog. The new kernel doesn't give it to oprofile anymore.
> Maybe the 'bug' is in oprofile tools, that currently expect to find '0'
Yes, it's likely a user space issue.
-Andi
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