From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 433C976C73 for ; Tue, 20 Feb 2024 17:30:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708450213; cv=none; b=VKBq28c47/DxrTFg1CC2voX5aB16BMala9dW1YzG8IxO+Am9wzTyuey/oUgKPJoJtW63dgcJeVTdMTkWX3BrR1F/vh6WOjZVk5G6IBsI5yc1DcAnYdX5065M2l8xHLpetTFuN4sj96LYGTmWSIynRDsE5/8J9QHXUYgpcl/Og6M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708450213; c=relaxed/simple; bh=k0FMmgNfs9nu8uShyqiykMfJCdKkwJauPu/9+oGhm/4=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=cEcZzhQ050MKPyiLMVwVTZ5G71qXX6c9fRKSczVX9buKD4cweT+P1FlJp1hRBqvRgMQPpvTN1DeMJ92snlbusK9Kq2/iuDFrwQ6zc4PPMVRi5JRbcsokuJgQOTioQx7UT7tG5g38vVOxETdVc+TMsmesfDog41gXNVenRnax5W4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=gJ/wHYZW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="gJ/wHYZW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 978A9C43390; Tue, 20 Feb 2024 17:30:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1708450212; bh=k0FMmgNfs9nu8uShyqiykMfJCdKkwJauPu/9+oGhm/4=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=gJ/wHYZWmjAnsS3He+umgyBGh3lXE7LqBO2wQar2CpQwcIZcUos0uNYS0uKR8dHok l8oFMHm+egBkXULKDCa4uSFIEMkZN0ggf+as2JbayPk8eKMwiz3gILYnOZDwxxIzMR 9v1ALjYE+dDKjU6VWh3A7XyQWA/rhUe1Da4qLrdE= Date: Tue, 20 Feb 2024 09:30:11 -0800 From: Andrew Morton To: Mikhail Gavrilov Cc: Vlastimil Babka , Marco Elver , Andrey Konovalov , glider@google.com, dvyukov@google.com, eugenis@google.com, Oscar Salvador , Linux List Kernel Mailing , Linux Memory Management List Subject: Re: regression/bisected commit 773688a6cb24b0b3c2ba40354d883348a2befa38 make my system completely unusable under high load Message-Id: <20240220093011.bf84486d704c3814079c2aa0@linux-foundation.org> In-Reply-To: References: <91c50335-e7b6-4ae1-9dad-a0c990b52021@suse.cz> <20240219152836.11d36709c594e66fe3037f2d@linux-foundation.org> <7e31accb-db01-486f-afb8-18a3f5402d00@suse.cz> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Tue, 20 Feb 2024 10:37:03 +0500 Mikhail Gavrilov wrote: > On Tue, Feb 20, 2024 at 4:50 AM Vlastimil Babka wrote: > > > > > > I'm all confused. > > > > > > 4434a56ec209 ("stackdepot: make fast paths lock-less again") was > > > mainlined for v6.8-rc3. > > > > Uh sorry, I just trusted the info that it's not merged and didn't verify > > it myself. Yeah, I can see it is there. > > > > Wait, I am talk about these two patches which is not merged yet: > [PATCH v2 1/2] stackdepot: use variable size records for non-evictable entries > [PATCH v2 2/2] kasan: revert eviction of stack traces in generic mode > https://lore.kernel.org/linux-mm/20240129100708.39460-1-elver@google.com/ A can move those into the 6.8-rc hotfixes queue, and it appears a cc:stable will not be required. However I'm not seeing anything in the changelogs to indicate that we're fixing a dramatic performance regression, nor why that regressions is occurring.