On Wed, Feb 22, 2023 at 09:16:07PM -0300, André Almeida wrote: > As it's done for zstd compression, enable multithread compression for > xz to speed up module installation. > > Signed-off-by: André Almeida <andrealmeid@xxxxxxxxxx> This seems reasonable to me. Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx> If for some reason Masahiro does not want to take this, you could set XZ_OPT=-T0 in your build environment, which should accomplish the same thing. > --- > > On my setup xz is a bottleneck during module installation. Here are the > numbers to install it in a local directory, before and after this patch: > > $ time make INSTALL_MOD_PATH=/home/tonyk/codes/.kernel_deploy/ modules_install -j16 > Executed in 100.08 secs > > $ time make INSTALL_MOD_PATH=/home/tonyk/codes/.kernel_deploy/ modules_install -j16 > Executed in 28.60 secs > --- > scripts/Makefile.modinst | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst > index 4815a8e32227..28dcc523d2ee 100644 > --- a/scripts/Makefile.modinst > +++ b/scripts/Makefile.modinst > @@ -99,7 +99,7 @@ endif > quiet_cmd_gzip = GZIP $@ > cmd_gzip = $(KGZIP) -n -f $< > quiet_cmd_xz = XZ $@ > - cmd_xz = $(XZ) --lzma2=dict=2MiB -f $< > + cmd_xz = $(XZ) --lzma2=dict=2MiB -f -T0 $< > quiet_cmd_zstd = ZSTD $@ > cmd_zstd = $(ZSTD) -T0 --rm -f -q $< > > -- > 2.39.2 >
