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Re: problem in run systemtap script
ch huang <justlooks@gmail.com> writes:
> how to handle this?
> [...]
> WARNING: probe module("ext3").function("ext3_journalled_set_page_dirty@fs/ext3/inode.c:1780").call
> (address 0xffffffff8804dff8) registration error (rc -22)
> WARNING: probe module("ext3").function("bget_one@fs/ext3/inode.c:1419").call
> (address 0xffffffff8804d50a) registration error (rc -22)
> [...]
This could be the kernel kprobes limitation also mentioned in
<https://bugzilla.redhat.com/show_bug.cgi?id=801785>. Some functions
will simply miss being probed. But note that they are all warnings.
> ERROR: probe overhead exceeded threshold
> WARNING: Number of errors: 1, skipped probes: 0
This would be the real problem. Rerun with -DSTP_NO_OVERLOAD to
disable the overload-prevention mechanism.
- FChE