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 28A282A1C9; Thu, 12 Jun 2025 01:54:25 +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=1749693266; cv=none; b=sk0e7qeBOxu4f7HF4CtVtUbbY0Im02HiVMhZOxEC7E432DiDa03c54NL2s9VumUYTnUtNkRxR5iwEKpBP2mNW2Mv+KNnyltI85jWhXxkxXblgdBmONRH204bxhq1i2jwcKyhdmC2leI+Lxylhqmn2Xq/TYHSFclHU3PwY2hInlQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749693266; c=relaxed/simple; bh=eMDfTk/BBqYcq/CPfA/Bjkk2xIKYHif8ciTCELud91g=; h=Date:From:To:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=Uk4CUTPzulctpOutCTDl2rlbR/TCiTfPQ6OsNgHa+XlEg3ef52f3ADGGszeWkzJ5FdW+hG1evfN3DcYMQcNkuWdqIOrd6rngIuhfSDQwLbTtFAyP4B7hfn8Ys5k9GEWWjybzljtBT8ckKUJqTufdDCNNCm6seGkVe9u+iJQb0DQ= 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=vUgQYu+p; 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="vUgQYu+p" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 165D4C4CEE3; Thu, 12 Jun 2025 01:54:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1749693265; bh=eMDfTk/BBqYcq/CPfA/Bjkk2xIKYHif8ciTCELud91g=; h=Date:From:To:Subject:In-Reply-To:References:From; b=vUgQYu+p69fTs1R9l5r3U3jL6CjvORXv7iAGZbWgBviMc7lewUaS/XdnldptbWOwu gJTFy4ogvTcWrxBzdrvWckAd2GJLErY7Onr3eQl0xwoAPITHl1c2DZ5A5ESRwFR129 XS+Y40t0IdDILfp1/evcUFHiavCafFVHQ8trAmlo= Date: Wed, 11 Jun 2025 18:54:24 -0700 From: Andrew Morton To: Kuan-Wei Chiu , corbet@lwn.net, colyli@kernel.org, kent.overstreet@linux.dev, robertpang@google.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-bcache@vger.kernel.org, jserv@ccns.ncku.edu.tw, stable@vger.kernel.org Subject: Re: [PATCH 0/8] Fix bcache regression with equality-aware heap APIs Message-Id: <20250611185424.79f3cf82da78c2b271629657@linux-foundation.org> In-Reply-To: <20250611184817.bf9fee25d6947a9bcf60b6f9@linux-foundation.org> References: <20250610215516.1513296-1-visitorckw@gmail.com> <20250611184817.bf9fee25d6947a9bcf60b6f9@linux-foundation.org> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 11 Jun 2025 18:48:17 -0700 Andrew Morton wrote: > Unfortunately the changelog provides no indication of the magnitude of > the userspace impact. Please tell us this, in detail. OK I found details in the 8th patch's Closes: link. That was tricky ;) It's impressively detailed but I'm still struggling to understand how much pain this regression causes users in real life. So some sort of reader-friendly executive summary would be great, please.