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Luis R. Rodriguez c930a1b23b coccicheck: enable parmap support 
Coccinelle has had parmap support since 1.0.2, this means
it supports --jobs, enabling built-in multithreaded functionality,
instead of needing one to script it out. Just look for --jobs
in the help output to determine if this is supported and use it
only if your number of processors detected is > 1.

If parmap is enabled also enable the load balancing to be dynamic, so
that if a thread finishes early we keep feeding it.

stderr is currently sent to /dev/null, addressing a way to capture
that will be addressed next.

If --jobs is not supported we fallback to the old mechanism.
We expect to deprecate the old mechanism as soon as we can get
confirmation all users are ready.

While at it propagate back into the shell script any coccinelle error
code. When used in serialized mode where all cocci files are run this
also stops processing if an error has occured. This lets us handle some
errors in coccinelle cocci files and if they bail out we should inspect
the errors. This will be more useful later to help annotate coccinelle
version dependency requirements. This will let you run only SmPL files
that your system supports.

Extend Documentation/coccinelle.txt as well.

As a small example, prior to this change, on an 8-core system:

Before:

$ export COCCI=scripts/coccinelle/free/kfree.cocci
$ time make coccicheck MODE=report
...

real    29m14.912s
user    103m1.796s
sys     0m4.464s

After:

real    16m22.435s
user    128m30.060s
sys     0m2.712s

v4:

o expand Documentation/coccinelle.txt to reflect parmap support info
o update commit log to reflect what we actually do now with stderr
o split out DEBUG_FILE use into another patch
o detect number of CPUs and if its 1 then skip parmap support,
  note that if you still support parmap, but have 1 CPU you will
  also go through the new branches, so the old complex multithreaded process
  is skipped as well.

v3:

o move USE_JOBS to avoid being overriden

v2:

o redirect coccinelle stderr to /dev/null by default and
  only if DEBUG_FILE is used do we pass it to a file
o fix typo of paramap/parmap

Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Nicolas Palix <nicolas.palix@imag.fr>
Signed-off-by: Michal Marek <mmarek@suse.com>
 		2016-07-22 12:13:39 +02:00
..
basic kbuild: add fine grained build dependencies for exported symbols 2016-03-29 16:30:56 -04:00
coccinelle coccinelle: catch krealloc() on devm_*() allocated memory 2016-06-21 11:43:32 +02:00
dtc scripts/dtc: Update to upstream version 53bf130b1cdd 2016-03-29 13:29:22 -05:00
gdb scripts/gdb: decode bytestream on dmesg for Python3 2016-05-23 17:04:14 -07:00
genksyms scripts: genksyms: fix resource leak 2016-04-20 09:24:49 +02:00
kconfig Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-05-26 22:27:09 -07:00
ksymoops
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mod modpost: fix module autoloading for OF devices with generic compatible property 2016-05-05 17:38:53 -07:00
package builddeb: really include objtool binary in headers package 2016-07-19 11:19:27 +02:00
selinux selinux: explicitly declare the role "base_r" 2015-07-13 13:32:00 -04:00
tracing kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
.gitignore KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
Kbuild.include kbuild: fix if_change and friends to consider argument order 2016-05-10 21:21:14 +02:00
Lindent scripts/Lindent: handle missing indent gracefully 2015-09-04 16:54:41 -07:00
Makefile KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
Makefile.asm-generic kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
Makefile.build kbuild: rename cmd_as_s_S to cmd_cpp_s_S 2016-04-20 10:49:09 +02:00
Makefile.clean Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2015-02-19 10:07:08 -08:00
Makefile.dtbinst dtbsinstall: don't move target directory out of the way 2016-01-28 11:40:32 +01:00
Makefile.extrawarn kbuild: move -Wunused-const-variable to W=1 warning level 2016-05-11 13:05:40 +02:00
Makefile.fwinst kbuild: include $(src)/Makefile rather than $(obj)/Makefile 2015-04-02 16:42:08 +02:00
Makefile.headersinst kbuild: collect shorthands into scripts/Kbuild.include 2014-11-26 14:36:52 +01:00
Makefile.help
…
Makefile.host kbuild: handle the dependency of multi-objs hostprogs appropriately 2014-08-19 10:26:20 +02:00
Makefile.kasan arm64: add KASAN support 2015-10-12 17:46:36 +01:00
Makefile.lib Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-05-26 22:01:22 -07:00
Makefile.modbuiltin
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Makefile.modinst modsign: Abort modules_install when signing fails 2015-08-07 16:26:13 +01:00
Makefile.modpost modpost: Add flag -E for making section mismatches fatal 2015-10-06 10:46:21 +10:30
Makefile.modsign modsign: lookup lines ending in .ko in .mod files 2014-08-27 21:54:11 +09:30
Makefile.ubsan ubsan: fix tree-wide -Wmaybe-uninitialized false positives 2016-03-22 15:36:02 -07:00
adjust_autoksyms.sh kbuild: fix adjust_autoksyms.sh for modules that need only one symbol 2016-05-10 17:25:29 +02:00
analyze_suspend.py PM / tools: analyze_suspend.py: update to v3.0 2014-08-09 02:47:58 +02:00
asn1_compiler.c ASN.1: fix open failure check on headername 2016-04-06 14:06:48 +01:00
bloat-o-meter scripts/bloat-o-meter: print percent change 2016-05-19 19:12:14 -07:00
bootgraph.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
check-lc_ctype.c DocBook: Use a fixed encoding for output 2015-09-28 01:31:48 -06:00
check_extable.sh scripts: add check_extable.sh script. 2015-04-13 21:03:02 +09:30
checkincludes.pl
…
checkkconfigsymbols.py checkkconfigsymbols.py: Fix typo in help message 2016-05-01 14:11:12 -07:00
checkpatch.pl checkpatch: improve --git <commit-count> shortcut 2016-05-20 17:58:30 -07:00
checkstack.pl Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-10-07 21:16:26 -04:00
checksyscalls.sh x86/asm/entry: Move the arch/x86/syscalls/ definitions to arch/x86/entry/syscalls/ 2015-06-04 07:37:37 +02:00
checkversion.pl
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cleanfile
…
cleanpatch
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coccicheck coccicheck: enable parmap support 2016-07-22 12:13:39 +02:00
config kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
conmakehash.c kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: handle symbols in modules 2016-05-19 19:12:14 -07:00
decodecode scripts/decodecode: make faulting insn ptr more robust 2013-04-29 15:54:27 -07:00
depmod.sh depmod: pass -P $CONFIG_SYMBOL_PREFIX 2013-02-22 11:52:31 +01:00
diffconfig vfs,ext2: remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX 2015-02-16 17:56:04 -08:00
docproc.c docproc: print a comment about autogeneration for rst output 2016-05-14 09:56:56 -06:00
export_report.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
extract-cert.c KEYS: Remove unnecessary header #inclusions from extract-cert.c 2015-09-25 16:31:45 +01:00
extract-ikconfig scripts/extract-ikconfig: Support LZ4-compressed images. 2015-04-15 14:01:12 +02:00
extract-module-sig.pl KEYS: Provide a script to extract a module signature 2015-10-21 15:18:36 +01:00
extract-sys-certs.pl KEYS: Use the symbol value for list size, updated by scripts/insert-sys-cert 2016-02-26 15:32:05 +00:00
extract-vmlinux scripts: add extract-vmlinux 2011-08-31 16:12:17 +02:00
gcc-goto.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-ld kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-version.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_32-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gcc-x86_64-has-stack-protector.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
gen_initramfs_list.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
get_maintainer.pl scripts/get_maintainer.pl: handle file names beginning with ./ 2016-01-20 17:09:18 -08:00
gfp-translate chmod +x scripts/gfp-translate 2012-06-27 12:44:29 -07:00
headerdep.pl
…
headers.sh CRIS: Fix headers_install 2014-12-20 00:01:12 +01:00
headers_check.pl headers_check: don't warn about c++ guards 2016-05-24 14:12:48 +10:00
headers_install.sh Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2014-10-14 09:22:26 +02:00
insert-sys-cert.c KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
kallsyms.c ARM: 8553/1: kallsyms: remove --page-offset command line option 2016-04-07 21:57:16 +01:00
kernel-doc kernel-doc: use rst C domain directives and references for types 2016-05-14 09:56:34 -06:00
kernel-doc-xml-ref scripts/kernel-doc: Adding cross-reference links to html documentation. 2015-08-16 22:11:16 -06:00
ld-version.sh ld-version: Drop the 4th and 5th version components 2016-05-13 14:02:05 +02:00
link-vmlinux.sh ARM: 8552/1: kallsyms: remove special lower address limit for CONFIG_ARM 2016-04-07 21:57:15 +01:00
makelst
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markup_oops.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mkcompile_h kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
mkmakefile kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
mksysmap mksysmap: Add h8300 local symbol pattern 2015-06-23 13:35:47 +09:00
mkuboot.sh
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mkversion
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module-common.lds kernel: add support for .init_array.* constructors 2015-02-13 21:21:42 -08:00
namespace.pl kallsyms: add support for relative offsets in kallsyms address table 2016-03-15 16:55:16 -07:00
objdiff scripts: objdiff: support directories for the augument of record command 2014-06-10 14:59:33 +02:00
patch-kernel kbuild: trivial - remove trailing spaces 2014-04-30 17:34:32 +02:00
pnmtologo.c kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
profile2linkerlist.pl kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00
prune-kernel scripts: add "prune-kernel" script to clean up old kernel images 2016-02-09 10:09:52 -08:00
recordmcount.c ftrace/scripts: Fix incorrect use of sprintf in recordmcount 2016-01-04 11:13:16 -05:00
recordmcount.h recordmcount: Fix endianness handling bug for nop_mcount 2015-11-03 10:45:26 -05:00
recordmcount.pl scripts/recordmcount.pl: support data in text section on powerpc 2016-01-13 12:35:41 +11:00
setlocalversion Fix detectition of kernel git repository in setlocalversion script [take #2] 2014-01-03 14:48:42 +01:00
show_delta kbuild: trivial - remove trailing empty lines 2014-06-10 00:04:06 +02:00
sign-file.c sign-file: fix build with CMS support disabled 2016-03-03 10:50:46 +00:00
sortextable.c parisc: Use generic extable search and sort routines 2016-03-23 16:00:46 +01:00
sortextable.h scripts/sortextable: suppress warning: `relocs_size' may be used uninitialized 2014-10-14 02:18:23 +02:00
spelling.txt scripts/spelling.txt: add "fimware" misspelling 2016-05-19 19:12:14 -07:00
stackdelta scripts: add stackdelta script 2015-08-28 17:04:40 +02:00
stackusage scripts: add stackusage script 2015-08-28 17:04:40 +02:00
tags.sh scripts/tags.sh: add regex to map kprobe helpers 2016-02-18 20:56:37 +01:00
unifdef.c
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ver_linux scripts: fix typo in ver_linux 2016-02-07 23:01:45 -08:00
xen-hypercalls.sh xen: build infrastructure for generating hypercall depending symbols 2015-03-16 14:49:13 +00:00
xz_wrap.sh kbuild: Make scripts executable 2014-08-20 16:03:45 +02:00