diff options
| -rw-r--r-- | kernel.spec | 4 | ||||
| -rwxr-xr-x[-rw-r--r--] | parallel_xz.sh | 26 |
2 files changed, 27 insertions, 3 deletions
diff --git a/kernel.spec b/kernel.spec index 737527e86..101240c54 100644 --- a/kernel.spec +++ b/kernel.spec @@ -51,8 +51,6 @@ Summary: The Linux kernel %if %{zipmodules} %global zipsed -e 's/\.ko$/\.ko.xz/' -# for parallel xz processes, replace with 1 to go back to single process -%global zcpu `nproc --all` %endif # define buildid .local @@ -2070,7 +2068,7 @@ find Documentation -type d | xargs chmod u+w fi \ fi \ if [ "%{zipmodules}" -eq "1" ]; then \ - find $RPM_BUILD_ROOT/lib/modules/ -type f -name '*.ko' | xargs -P%{zcpu} xz; \ + find $RPM_BUILD_ROOT/lib/modules/ -type f -name '*.ko' | %{SOURCE79} %{?_smp_mflags}; \ fi \ %{nil} diff --git a/parallel_xz.sh b/parallel_xz.sh index e69de29bb..bc08a548d 100644..100755 --- a/parallel_xz.sh +++ b/parallel_xz.sh @@ -0,0 +1,26 @@ +#!/bin/sh +# Reads filenames on stdin, xz-compresses each in place. +# Not optimal for "compress relatively few, large files" scenario! + +# How many xz's to run in parallel: +procgroup="" +while test "$#" != 0; do + # Get it from -jNUM + N="${1#-j}" + if test "$N" = "$1"; then + # Not -j<something> - warn and ignore + echo "parallel_xz: warning: unrecognized argument: '$1'" + else + procgroup="$N" + fi + shift +done + +# If told to use only one cpu: +test "$procgroup" || exec xargs -r xz +test "$procgroup" = 1 && exec xargs -r xz + +# xz has some startup cost. If files are really small, +# this cost might be significant. To combat this, +# process several files (in sequence) by each xz process via -n 16: +exec xargs -r -n 16 -P $procgroup xz |