From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D0F6AC433F5 for ; Fri, 17 Sep 2021 15:07:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B9DF661164 for ; Fri, 17 Sep 2021 15:07:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235077AbhIQPIo (ORCPT ); Fri, 17 Sep 2021 11:08:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237944AbhIQPIl (ORCPT ); Fri, 17 Sep 2021 11:08:41 -0400 Received: from mail-io1-xd34.google.com (mail-io1-xd34.google.com [IPv6:2607:f8b0:4864:20::d34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 38EDEC061574; Fri, 17 Sep 2021 08:07:19 -0700 (PDT) Received: by mail-io1-xd34.google.com with SMTP id a22so12576539iok.12; Fri, 17 Sep 2021 08:07:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=01aK1+qs2ony0wtCQjSv+7PH8MX0z1DNX/5puDnYAWQ=; b=biO/72ML/F+PPNWDuVwkDDkLg2Z4jjzWk/o5+eoWrS8dH8z2f3TqTrCuDEl84cUwwt 7LIsbRSHwlZKmb+aag6R5lpml1WbaUESR9WiUuKXXjBCez1pdcBVTDXDGx1/eLXkA8Pr J7xN3RWrz5vdtmg53+goJyUSpZbKyuHScstZEj6hWJBq51ng40CgHRGQmtLMO938L+Aq zydcrME1WLaypBvvcW6nZq7G156eG0bFe5UKAQXfA5YKaBwbkqgC6Zb+bj4ngOOkaHFG +10JzOLDGgt9WDTBMjCUUApVzgclvWALYtpjjlYjyKMOl1sqG549vZoR3nh+szp5oUaO msCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=01aK1+qs2ony0wtCQjSv+7PH8MX0z1DNX/5puDnYAWQ=; b=fKXu4sFWl7wER0I15wPEIPnA3RF7FLw30Khb2pprjj/n2S4YFtD2ybCmAwTRVO/Krj uWY8ZOIo+FR7IK/QQm9o6+yAj8GgOOTIbLZzGAY+qLOrFqnYNL8aBMi5XQ93N8+z49oc lpqZ2Zb6vJ8/67LLmZCCxwBa9ChmD/PSwEfVRoNBNKbm6Zb899FmQnxBgZVGKQCOeJe9 5iQs0baKkmOo/oWcRlQaIvfXprdxcouytEE7GZ68B70bLrLEPJFnaiB/yyRdXZ5KmJzh 2HpvaO83ywne+rwk3IGWMs9Bz5pvFGsMtnJ1JkNpB3Y/w1UuO4uSic6pRorJ2UP8SHMt XiGw== X-Gm-Message-State: AOAM53216T2aXjSyKVjtZx3XKfKa10RpPcKJ5gNSewDSQUvb9D96ONtS qEt2coL9XKTYksH9tLxrXomwguVZgr3wuPpWxdQApBc3 X-Google-Smtp-Source: ABdhPJz/hW2EPv/26N4Tu75FdUs6UoMyYVOrMMC+eV3FmlUjSROonOgk5A7zua0dDEkAZX2m/aZSZehjX9Q2R9/KAag= X-Received: by 2002:a6b:7104:: with SMTP id q4mr1230501iog.29.1631891238494; Fri, 17 Sep 2021 08:07:18 -0700 (PDT) MIME-Version: 1.0 References: <20210910130954.1392104-1-lucjan.lucjanov@gmail.com> In-Reply-To: <20210910130954.1392104-1-lucjan.lucjanov@gmail.com> From: =?UTF-8?Q?Piotr_G=C3=B3rski?= Date: Fri, 17 Sep 2021 17:07:06 +0200 Message-ID: Subject: Re: [PATCH] kbuild: use smaller dictionary size for zstd module compression To: Linux Kernel Mailing List Cc: Linux Kbuild mailing list , Michal Marek , Masahiro Yamada , Nick Desaulniers Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Ping... pt., 10 wrz 2021 o 15:10 Piotr Gorski napisa=C5= =82(a): > > By default, zstd without parameters uses a dictionary size of 8 MB. > However, most modules are much smaller than that. > Use a dictionary size of 2 MB for module compression, resulting in > slightly higher compression speed while still maintaining a good > compression ratio. > The --zstd=3Dwlog=3D21 option is equivalent to --lzma2=3Ddict=3D2MiB used= in XZ compression. > > Signed-off-by: Piotr Gorski > --- > scripts/Makefile.modinst | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst > index ff9b09e4cfca..c3475e5aca7c 100644 > --- a/scripts/Makefile.modinst > +++ b/scripts/Makefile.modinst > @@ -97,7 +97,7 @@ quiet_cmd_gzip =3D GZIP $@ > quiet_cmd_xz =3D XZ $@ > cmd_xz =3D $(XZ) --lzma2=3Ddict=3D2MiB -f $< > quiet_cmd_zstd =3D ZSTD $@ > - cmd_zstd =3D $(ZSTD) -T0 --rm -f -q $< > + cmd_zstd =3D $(ZSTD) --zstd=3Dwlog=3D21 -T0 --rm -f -q $< > > $(dst)/%.ko.gz: $(dst)/%.ko FORCE > $(call cmd,gzip) > -- > 2.33.0.142.ge0a2f5cbc5 >