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[23.128.96.18]) by mx.google.com with ESMTP id b16si5383282ejv.583.2020.10.25.10.22.08; Sun, 25 Oct 2020 10:22:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1416039AbgJYMqG (ORCPT + 99 others); Sun, 25 Oct 2020 08:46:06 -0400 Received: from mail-ot1-f65.google.com ([209.85.210.65]:43796 "EHLO mail-ot1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1416032AbgJYMqF (ORCPT ); Sun, 25 Oct 2020 08:46:05 -0400 Received: by mail-ot1-f65.google.com with SMTP id k68so5661269otk.10; Sun, 25 Oct 2020 05:46:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=PAyOG8KXMj9ahjjZJ9yihvyoTqK3oGi3EPsVzO3w7LQ=; b=HnwpLr2iNCxLKz9YTClU1tHIDxAVM/PwG6G3RQxwN1COK/AiiNZ860mgs6v/CjW2N0 Y1M2U64hPsMRQL+o0LgIVvElAGo2ouGfnQRkcZjzPyp7iZbmqELop5W63zGsyvA3RUP2 WjXAuI+tIxs0F7diShTkyTvLVRun+qonx/gul56HOgIRB2bJwK+bHO+mFhCOMu8v6q2b liWqqloGvvfTNOkLsv6tVd9qEGzOFMaH5zpneQ+2efhpaFzAV+J+cGDqmEa50VoFm3xd LaoyYNmF9CBbBxBkVXUg++xlAGQhTGLuZuw/5ZlJannmF3SUhRnkhE7TsV/JQoHVadxI thSw== X-Gm-Message-State: AOAM531x/M2rdqq770Ceg5cqnm8q/goqRt0Wq0eW21lzzrE+ooADJcR3 8Se3gt7zeh7zrKcKbgsZMkEWRkuvHDxLrQsO+KU= X-Received: by 2002:a05:6830:210a:: with SMTP id i10mr9252914otc.145.1603629963765; Sun, 25 Oct 2020 05:46:03 -0700 (PDT) MIME-Version: 1.0 References: <20201008154651.1901126-1-arnd@arndb.de> <20201008154651.1901126-14-arnd@arndb.de> In-Reply-To: From: Geert Uytterhoeven Date: Sun, 25 Oct 2020 13:45:52 +0100 Message-ID: Subject: Re: [RFC 13/13] m68k: mac: convert to generic clockevent To: Arnd Bergmann Cc: Finn Thain , "linux-kernel@vger.kernel.org" , Russell King , Tony Luck , Fenghua Yu , Greg Ungerer , Philip Blundell , Joshua Thompson , Sam Creasey , "James E.J. Bottomley" , Helge Deller , Thomas Gleixner , Daniel Lezcano , John Stultz , Stephen Boyd , Linus Walleij , "linux-ia64@vger.kernel.org" , Parisc List , linux-m68k , Linux ARM Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 23, 2020 at 11:24 AM Geert Uytterhoeven wrote: > On Fri, Oct 23, 2020 at 9:52 AM Arnd Bergmann wrote: > > On Sun, Oct 18, 2020 at 2:55 AM Finn Thain wrote: > > > On Thu, 15 Oct 2020, Arnd Bergmann wrote: > > > > On Thu, Oct 15, 2020 at 3:19 AM Finn Thain wrote: > > > > > On Sat, 10 Oct 2020, Arnd Bergmann wrote: > > > > > > That configuration still produces the same 5 KiB of bloat. I see that > > > kernel/time/Kconfig has this -- > > > > > > # Core internal switch. Selected by NO_HZ_COMMON / HIGH_RES_TIMERS. This is > > > # only related to the tick functionality. Oneshot clockevent devices > > > # are supported independent of this. > > > config TICK_ONESHOT > > > bool > > > > > > But my question was really about both kinds of dead code (oneshot device > > > support and oneshot tick support). Anyway, after playing with the code for > > > a bit I don't see any easy way to reduce the growth in text size. > > > > Did you look more deeply into where those 5KB are? Is this just > > the code in kernel/time/{clockevents,tick-common}.c and the > > added platform specific bits, or is there something more? > > I suppose the sysfs interface and the clockevents_update_freq() > > logic are not really needed on m68k, but it wouldn't make much > > sense to split those out either. > > > > How does the 5KB bloat compare to the average bloat we get > > from one release to the next? Geert has been collecting statistics > > for this. > > It would be a fair share of the typical increase of ca. 30 KiB per > kernel release. Still, it would be lost in the noise of the increase for > v5.10-rc1: > > add/remove: 1200/455 grow/shrink: 1419/821 up/down: 468970/-93714 (375256) > Function old new delta > _printk_rb_static_infos - 180224 +180224 > write_buf 8192 32768 +24576 > _printk_rb_static_descs - 24576 +24576 > HUF_decompress4X4_usingDTable_internal - 5664 +5664 > HUF_decompress4X2_usingDTable_internal - 5006 +5006 > __ext4_ioctl - 4774 +4774 > sock_ops_convert_ctx_access 3840 8462 +4622 > ZSTD_decompressSequences - 3100 +3100 FTR, 3.9 KiB reclaimed by upgrading from gcc 8.4.0 in Ubuntu 18.04LTS to gcc 9.3.0 in Ubuntu 20.04LTS. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org 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