From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 33D803A1BE; Mon, 22 Jan 2024 10:50:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.237.130.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705920646; cv=none; b=bhvjMGPfH0jrr/o0mBJuq1JoKzJ8SzoHL08pywOTE+N0o3g9kAV74sgWwoadrv5wjP6OvrP0kcXG6NjBSHsLeBNy4yTBQ/MiqGurb/mClKghXhHkPwe08Z/dznQIrYle5ogHYweo3+M8XCEcYT/8P9moq2I12CNIvZbM9wT/ZDc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705920646; c=relaxed/simple; bh=6GGGsTAkyuykJmXCUUzWPb7tQVhFfHYPnkRQ7X+yi7Y=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=RNsyAMJuWXBzyuzDLD9rDnmKSaMgtMHFigabA5EKQeR87+5UNktnZxdrTG/yu+WVLerYGFr66+RAqSYffM/088IrYfqiXeLp57p1/ubM56RNYFldVKGP+BdQj1olrGUR8S3ZjEPsVYSC5X5D8cp8yhpLCkhjJ9tEsi84asI3goU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=leemhuis.info; spf=pass smtp.mailfrom=leemhuis.info; arc=none smtp.client-ip=80.237.130.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=leemhuis.info Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=leemhuis.info Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1rRrt4-0005LQ-UK; Mon, 22 Jan 2024 11:50:42 +0100 Message-ID: <5ae01623-3f0f-4c19-bf5e-29e39e9e9349@leemhuis.info> Date: Mon, 22 Jan 2024 11:50:42 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [MAYBE REGRESSION] kbuild time of kernel compiling Content-Language: en-US, de-DE To: Jingbo Xu , linux-kbuild@vger.kernel.org, masahiroy@kernel.org, nathan@kernel.org, ndesaulniers@google.com, nicolas@fjasle.eu, Linux kernel regressions list Cc: "linux-kernel@vger.kernel.org" References: From: "Linux regression tracking (Thorsten Leemhuis)" Reply-To: Linux regressions mailing list In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1705920645;979e1402; X-HE-SMSGID: 1rRrt4-0005LQ-UK On 22.01.24 09:32, Jingbo Xu wrote: > > I noticed a regression of kbuild time in v6.7, especially when running > `make` command when all images have already been compiled. In v6.6 it > takes ~3s, while in v6.7 it takes ~18s. > > I'm not sure if it's a known issue, or an extra action configurable with > a "CONFIG_XX" option. > [...] Not my area of expertise, so take this with a gain of salt, as I might mislead you. Nevertheless: One problem with compile times in 6.7 was noticed and fixed in mainline; I wonder if that is the same issue as yours: https://lore.kernel.org/lkml/18c6df0d-45ed-450c-9eda-95160a2bbb8e@gmail.com/ https://git.kernel.org/torvalds/c/31e97d7c9ae3de072d7b424b2cf706a03ec10720 I think there was another issue, but can't remember it from the top of my head. Maybe simply checking if 6.8-rc1 fixes things might be the best. Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr If I did something stupid, please tell me, as explained on that page.