Hi Rob, On Tue, Mar 9, 2021 at 6:42 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote: > On Tue, Mar 9, 2021 at 4:21 AM Geert Uytterhoeven > <geert+renesas@xxxxxxxxx> wrote: > > Setting DT_SCHEMA_FILES allows the user to restrict the > > "dt_binding_check" make target to a specified set of DT binding files. > > However, yamllint is still run on all available files, which can take > > quite some time. > > > > Fix this by changing "find_cmd" to only return the specified files. > > Note that this also affects the "cmd_chk_bindings" and "cmd_mk_schema" > > rules. > > > > This reduces the execution time of > > > > make dt_binding_check DT_SCHEMA_FILES=/path/to/json/schema/file > > > > from ca. 22 to less than 2 seconds on an i7-8700K. > > We could use xargs sharding like 'chk_bindings' does. That goes from > 18s to 5s for me (i7-7700HQ). Good enough? Not sure why I didn't other > than thinking 20sec was fast enough. Sounds better, but yamllint (on all files) would still take 80% of the time for a single binding check, assuming a reasonably fast multi-core machine. My main objection is that while working on a new binding, and using DT_SCHEMA_FILES, I don't want to waste time on checking other bindings, and being bothered with warnings about them. > > Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > > --- > > Should this be restricted to cmd_yamllint? > > I'm not sure which users of find_cmd do and do not need all files. > > cmd_chk_bindings always does. cmd_mk_schema needs both. So I think > this doesn't work for all cases. Thanks, will respin to restrict to yamllint. > > --- a/Documentation/devicetree/bindings/Makefile > > +++ b/Documentation/devicetree/bindings/Makefile > > @@ -22,10 +22,18 @@ $(obj)/%.example.dts: $(src)/%.yaml check_dtschema_version FORCE > > # Use full schemas when checking %.example.dts > > DT_TMP_SCHEMA := $(obj)/processed-schema-examples.json > > > > +ifeq ($(DT_SCHEMA_FILES),) > > + > > find_cmd = find $(srctree)/$(src) \( -name '*.yaml' ! \ > > -name 'processed-schema*' ! \ > > -name '*.example.dt.yaml' \) > > > > +else > > + > > +find_cmd = echo $(addprefix $(srctree)/, $(DT_SCHEMA_FILES)) > > + > > +endif > > + > > quiet_cmd_yamllint = LINT $(src) > > cmd_yamllint = ($(find_cmd) | \ > > xargs $(DT_SCHEMA_LINT) -f parsable -c $(srctree)/$(src)/.yamllint) || true Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds