[Bug kprobes/11421] New: probe point mismatch while resolving probe point vfs.read

["tethys at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

In section 2.1.3
(http://sourceware.org/systemtap/SystemTap_Beginners_Guide/using-systemtap.html#testing),
it says to try:

stap -v -e 'probe vfs.read {printf("read performed\n"); exit()}'

This doesn't work, giving the error:

root@quimby:~/stp# stap -v -e 'probe vfs.read {printf("read\n"); exit()}'
Pass 1: parsed user script and 38 library script(s) in 120usr/0sys/129real ms.
semantic error: probe point mismatch at position 1 (alternatives:
__set_page_dirty_buffers add_to_page_cache block_sync_page buffer_migrate_page
do_mpage_readpage do_sync_read do_sync_write remove_from_page_cache) while
resolving probe point vfs.read
Pass 2: analyzed script: 0 probe(s), 0 function(s), 0 embed(s), 0 global(s) in
0usr/0sys/2real ms.
Pass 2: analysis failed.  Try again with more '-v' (verbose) options.

-- 
           Summary: probe point mismatch while resolving probe point
                    vfs.read
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: kprobes
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: tethys at gmail dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=11421

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