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Mathieu Desnoyers 87f3b6b6fb Marker depmod fix core kernel list 
* Theodore Ts'o (tytso@mit.edu) wrote:
>
> I've been playing with adding some markers into ext4 to see if they
> could be useful in solving some problems along with Systemtap.  It
> appears, though, that as of 2.6.27-rc8, markers defined in code which is
> compiled directly into the kernel (i.e., not as modules) don't show up
> in Module.markers:
>
> kvm_trace_entryexit arch/x86/kvm/kvm-intel  %u %p %u %u %u %u %u %u
> kvm_trace_handler arch/x86/kvm/kvm-intel  %u %p %u %u %u %u %u %u
> kvm_trace_entryexit arch/x86/kvm/kvm-amd  %u %p %u %u %u %u %u %u
> kvm_trace_handler arch/x86/kvm/kvm-amd  %u %p %u %u %u %u %u %u
>
> (Note the lack of any of the kernel_sched_* markers, and the markers I
> added for ext4_* and jbd2_* are missing as wel.)
>
> Systemtap apparently depends on in-kernel trace_mark being recorded in
> Module.markers, and apparently it's been claimed that it used to be
> there.  Is this a bug in systemtap, or in how Module.markers is getting
> built?   And is there a file that contains the equivalent information
> for markers located in non-modules code?

I think the problem comes from "markers: fix duplicate modpost entry"
(commit d35cb360c2)

Especially :

  -   add_marker(mod, marker, fmt);
  +   if (!mod->skip)
  +     add_marker(mod, marker, fmt);
    }
    return;
   fail:

Here is a fix that should take care if this problem.

Thanks for the bug report!

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Tested-by: "Theodore Ts'o" <tytso@mit.edu>
CC: Greg KH <greg@kroah.com>
CC: David Smith <dsmith@redhat.com>
CC: Roland McGrath <roland@redhat.com>
CC: Sam Ravnborg <sam@ravnborg.org>
CC: Wenji Huang <wenji.huang@oracle.com>
CC: Takashi Nishiie <t-nishiie@np.css.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-06 16:34:19 -07:00
..
basic kernel-doc: new P directive for DOC: sections 2008-01-28 23:14:35 +01:00
genksyms kbuild: genksyms: Include extern information in dumps 2008-07-31 23:01:31 +02:00
kconfig kconfig: readd lost change count 2008-09-29 08:03:01 -07:00
ksymoops
mod Marker depmod fix core kernel list 2008-10-06 16:34:19 -07:00
package Kbuild: Fix deb-pkg target to work with kernel versions ending with -<text-without-digit> 2008-02-09 10:51:47 +01:00
rt-tester
.gitignore Add binoffset to gitignore 2008-02-09 10:43:58 +01:00
bin2c.c
binoffset.c
bloat-o-meter fix bloat-o-meter for ppc64 2007-12-17 19:28:17 -08:00
checkincludes.pl
checkkconfigsymbols.sh kbuild: script to check for undefined Kconfig symbols 2007-10-12 21:13:50 +02:00
checkpatch.pl checkpatch: version 0.21 2008-07-24 10:47:27 -07:00
checkstack.pl fix checkstack.pl arch detection 2008-07-25 10:53:27 -07:00
checksyscalls.sh i386/x86_64: move headers to include/asm-x86 2007-10-11 11:20:03 +02:00
checkversion.pl
cleanfile scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
cleanpatch scripts: Make cleanfile/cleanpatch warn about long lines 2007-07-16 21:15:50 +02:00
conmakehash.c
decodecode Mark 'scripts/decodecode' executable 2008-05-30 14:02:21 -07:00
diffconfig kconfig: add diffconfig utility 2008-07-25 22:12:41 +02:00
export_report.pl kbuild: fix perl usage in export_report.pl 2007-10-12 21:13:50 +02:00
extract-ikconfig
gcc-version.sh kbuild: fix buglet in gcc-version.sh 2008-01-28 23:14:36 +01:00
gcc-x86_64-has-stack-protector.sh
gen_initramfs_list.sh kbuild: fix unportability in gen_initramfs_list.sh 2008-04-28 22:50:51 +02:00
headers_check.pl kbuild: optimize headers_* targets 2008-07-25 22:12:16 +02:00
headers_install.pl kbuild: install all headers when arch is changed 2008-07-25 22:12:18 +02:00
headers.sh kbuild: prepare headers_* for arch/$ARCH/include 2008-07-25 22:12:33 +02:00
kallsyms.c kbuild: filter away debug symbols from kernel symbols 2008-05-19 20:07:58 +02:00
Kbuild.include kbuild: fix make V=1 2008-02-11 17:43:54 +01:00
kernel-doc kernel-doc: allow structs whose members are all private 2008-09-23 08:09:13 -07:00
Lindent scripts/Lindent: support gnu indent v2.2.10 2008-04-29 08:06:04 -07:00
Makefile
Makefile.build kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.clean kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.fwinst firmware: silence __fw_modbuild and __fw_modinst 'Nothing to be done' messages 2008-08-02 07:52:29 +01:00
Makefile.headersinst kbuild: install all headers when arch is changed 2008-07-25 22:12:18 +02:00
Makefile.host kbuild: fix some minor typoes 2008-04-25 20:18:48 +02:00
Makefile.lib kbuild: create new CFLAGS_REMOVE_(basename).o option 2008-05-23 22:43:33 +02:00
Makefile.modinst kbuild: fix installing external modules 2008-01-28 23:14:36 +01:00
Makefile.modpost markers: fix duplicate modpost entry 2008-07-22 09:59:41 -07:00
makelst kbuild: introduce ccflags-y, asflags-y and ldflags-y 2007-10-15 22:25:06 +02:00
mkcompile_h kbuild: override build timestamp & version 2007-05-02 20:58:09 +02:00
mkmakefile kbuild: scripts/mkmakefile: dynamic determination of output directory 2008-01-28 23:14:38 +01:00
mksysmap kbuild: filter away debug symbols from kernel symbols 2008-05-19 20:07:58 +02:00
mkuboot.sh kbuild/mkuboot.sh: allow spaces in CROSS_COMPILE 2007-05-02 20:58:10 +02:00
mkversion
namespace.pl x86: fixup the x86 namespace change in scripts/namespace.pl 2007-10-11 17:56:02 +02:00
patch-kernel bugfix for scripts/patch-kernel in 2.6 sublevel stepping 2008-08-06 22:11:33 +02:00
pnmtologo.c
profile2linkerlist.pl
setlocalversion setlocalversion: do not describe if there is nothing to describe 2008-07-25 22:12:53 +02:00
show_delta
unifdef.c
ver_linux kbuild: scripts/ver_linux: don't set PATH 2008-07-31 23:36:54 +02:00