Re: Systemtap results on power64 box against kernel version 2.6.35-rc4-git5

[David Smith <dsmith at redhat dot com>]

On 07/13/2010 09:53 AM, David Smith wrote:
> On 07/13/2010 08:40 AM, divya wrote:
>> Hi Everyone,
>> Here is the result of systemtap snap test on kernel 2.6.35-rc4-git5
>>
>> Arch - ppc64
>> elfutils version - 0.148

Divya was kind enough to send me the full log file, so I've had a look
at some of these errors.  Most of the errors look to be debuginfo
problems with 1 build-id problem.

>> FAIL: systemtap.examples/general/badname build
>> FAIL: systemtap.examples/general/badname run

Hmm, it looks like the test should be a bit smarter and not try to run a
script if it fails to build.  Anyway, this one fails with errors like:

semantic error: failed to retrieve location attribute for local 'child'
(dieoffset: 0xf3c95c): identifier '$child' at badname.stp:16:7
        source:   if ($child->d_inode || $dir->i_flags & 16) next

This looks like a debuginfo problem.  Can you show me the output of:

# stap -L 'kernel.function("may_create@fs/namei.c")'

>> FAIL: systemtap.examples/io/iostat-scsi run

This one failed with:

ERROR: Build-id mismatch: "sd_mod" vs. "sd_mod.ko" byte 0 (0xc1 vs 0x00)
rc 0 -14

which means that stap doesn't think your debuginfo and the actual module
match.  Other stap folk can probably expound more here.

>> FAIL: systemtap.examples/network/netdev build
>> FAIL: systemtap.examples/network/netdev run

This one failed with:

semantic error: failed to retrieve location attribute for local 'dev'
(dieoffset: 0x2daa6f2): identifier '$dev' at
/usr/local/share/systemtap/tapset/networking.stp:159:29
        source:         dev_name = get_netdev_name($dev)

I'd bet this one is a debuginfo problem.  Can you show me the output of:

# stap -L netdev.change_rx_flag

>> FAIL: systemtap.examples/network/socktop run

This one was a testcase problem that I just fixed.

> Hmm, I'm surprised the examples failed.  Can you privately email me the
> systemtap.log output for systemtap.examples/check.exp?
> 
>> FAIL: buildok/nfsd-detailed.stp

This one dies with:

semantic error: not accessible at this address (0x1703c): identifier
'$filp' at /usr/local/share/systemtap/tapset/nfsd.stp:1046:29^M
        source:         filename = __file_filename($filp)^M

This looks like a debuginfo problem.  Can you show me the output of:

# stap -L nfsd.close

>> FAIL: buildok/pr10678.stp

This one dies with:

semantic error: no match while resolving probe point
module("ne2k_pci").function("ne2k_pci_open")

This is a test problem, not a real problem.

>> FAIL: buildok/scsi-detailed.stp

This one dies errors like:

semantic error: not accessible at this address (0x10e34): identifier
'$cmd' at /usr/local/share/systemtap/tapset/scsi.stp:133:12^M
        source:         host_no = $cmd->device->host->host_no^M

This looks like another debuginfo problem.  Can you show me the output of:

# stap -L scsi.iodone

-- 
David Smith
dsmith@redhat.com
Red Hat
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