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Re: Systemtap with kernel markers?
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: Theodore Tso <tytso at mit dot edu>
- Cc: systemtap at sources dot redhat dot com
- Date: Fri, 03 Oct 2008 08:28:14 -0400
- Subject: Re: Systemtap with kernel markers?
- References: <20081003032829.GA9017@mit.edu>
Theodore Tso <tytso@mit.edu> writes:
> So in attempt to help out Arjan van de Ven on a recent problem that he
> posted on LKML, I patched ext4 with some markers (see attached patch).
> The markers are definitely found in the in the kernel:
That should "just work", as of many months ago.
> semantic error: no match while resolving probe point kernel.mark("ext4_sync_file")
> [...]
> Any suggestions [...]
The marker interface code uses the Module.markers file generated by
modpost to get a list of available markers. Perhaps this file is not
being found (in which case our code should emit a proper error
message). Can you find the Module.markers file by hand? Can you try
stracing stap to see if it found it?
- FChE