From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-pp-o94.zoho.com (sender4-pp-o94.zoho.com [136.143.188.94]) (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 31D721FECAB for ; Mon, 18 May 2026 03:55:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.94 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779076516; cv=pass; b=Nnf3KF9sGdM/GuIk5kjJq7OGu5K72MvhrHuiXVzfi3wuwb8Va336tHwtvWB0CuHevv/SSSgNuAqrzemVjxo+DQIy1gS4xUVfeXfvuOSi+CUCedjmOLmPbE+PvaI2JplkH7h9bgwSYmU8EdulqQ/V0dBGtR3Ie/5o7Fp4Y5tIhC0= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779076516; c=relaxed/simple; bh=LwGt6MPpM3OQtSa2Vi4laqH/3tODQHjPzuQ2iKXCEyU=; h=From:To:Cc:References:In-Reply-To:Subject:Date:Message-ID: MIME-Version:Content-Type; b=QD0nEsRrA6zwUQZs/H0MiFNU4aMiM4/ab98aNb4qJx1gu5Z7Y4OQGpRzHYd8AvtHksPhEy7HoXPce5ZYm7rN/vmeEQsbLYJzI/43VMX46/TOan/gh6wfZqjcxOFbV0d4FlRZd2WX4PlvbupnAnhiNzV4cJUJE5n7hgp9eoRrsNc= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com; spf=pass smtp.mailfrom=zohomail.com; dkim=pass (1024-bit key) header.d=zohomail.com header.i=mhklkml@zohomail.com header.b=RGpRB30Q; arc=pass smtp.client-ip=136.143.188.94 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zohomail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zohomail.com header.i=mhklkml@zohomail.com header.b="RGpRB30Q" ARC-Seal: i=1; a=rsa-sha256; t=1779076495; cv=none; d=zohomail.com; s=zohoarc; b=VmmLKrmwyax9ys0dxIbIsexwurt0DtMMJzGl9NllcT6a3M6a/RvQ5Jr/dTlvI/g4Ub99TgL7sN82ApeEX2SAoBZbubf8vGG/267/NtB6b7so+uEJmYMQvmuqTQb56/oDVgC4W9PovC5/9zI3DwuZ+J9QI5clIPWWIxtp8y60UIg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1779076495; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:Subject:To:To:Message-Id:Reply-To; bh=AWwA9IhuZAbyC4NPTwyFgMfXjZLLjdxG5LqaakWTHPE=; b=hQCbTWGkCthEPzG/q0CtmMvMy5aHa1tl5M5Przf0N4Rlu07agUZYMkwIAlug0Gzq4WDbRXXWwIzcNjVusftm3Jhiwp73GlT9z5drnPLyXz26ZH2n1fg6WruqxmeBpt3Jy3oTrzh7v0jkLc4Tcbx672BdH6rKXgcTdQsiV1WJKJg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=zohomail.com; spf=pass smtp.mailfrom=mhklkml@zohomail.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1779076495; s=zm2022; d=zohomail.com; i=mhklkml@zohomail.com; h=From:From:To:To:Cc:Cc:References:In-Reply-To:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Type:Content-Transfer-Encoding:Feedback-ID:Message-Id:Reply-To; bh=AWwA9IhuZAbyC4NPTwyFgMfXjZLLjdxG5LqaakWTHPE=; b=RGpRB30QITvD9qdqGoPijfAl77TcEHt7j4ezvejsPqVavC2XURT4hl3HAp10qfJ3 EvlT7YUCtino2dTCtbT2f0xqPYVg9kGB6f6trBve+L/glFjXmB+1tNETxTiX5wbMMZ3 6wJRT6JDzWxfSIbV1sdJeaFmKjG0YaqbYPA2m58o= Received: by mx.zohomail.com with SMTPS id 17790764917541021.6685477683561; Sun, 17 May 2026 20:54:51 -0700 (PDT) From: To: "'Thomas Gleixner'" , "'LKML'" Cc: , "'Michael Kelley'" , "'Dmitry Ilvokhin'" , "'Radu Rendec'" , "'Jan Kiszka'" , "'Kieran Bingham'" , "'Florian Fainelli'" , "'Marc Zyngier'" References: <20260517194421.705253664@kernel.org> In-Reply-To: <20260517194421.705253664@kernel.org> Subject: RE: [patch V6 00/16] Improve /proc/interrupts further Date: Sun, 17 May 2026 20:54:49 -0700 Message-ID: <001801dce67a$14564930$3d02db90$@zohomail.com> 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="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Content-Language: en-us Thread-Index: AQH56g6/qV8GK9atT2+Q5TEoV0zp2LXZHn+g Feedback-ID: zu0801122790fa0e6223ecf0033b7a23d50000939603395bc01926be2b634ba1ceafa22b243285235079659c:ZohoMail X-Zoho-CM-AccountID: 0c88436b239415d28725328898ceccb9ce2ba3b61598c1c37bcb2109e0248174 X-ZohoMailClient: External From: Thomas Gleixner Sent: Sunday, May 17, 2026 1:01 PM > > This is a follow up to v5 which can be found here: > > https://lore.kernel.org/20260401195625.213446764@kernel.org > > The v1 cover letter contains a full analysis, explanation and numbers: > > https://lore.kernel.org/20260303150539.513068586@kernel.org > > TLDR: > > - The performance of reading of /proc/interrupts has been improved > piecewise over the years, but most of the low hanging fruit has been > left on the table. As I did previously with v2 and v5 of the patch series, I tested in Hyper-V guests on x86/x64 and arm64. Did basic smoke tests of taking a CPU offline, and removing a PCI device along with its IRQs, then adding them back again. Everything looks good. The improved alignment looks 100% good. The alignment nits I called out against v5 are fixed, and I did not find anything new to be picky about. I did not do anything with the new binary interface or the gdb Python script. Tested-by: Michael Kelley > > Changes vs. V5: > > - Rebased against v7.1-rc2 > > - Addressed some formatting/alignment details - Radu, Michael > > - Fixed some 0-day fallout vs. various Kconfig combinations > > - Picked up tags where appropriate > > Delta patch against v5 is below. > > The series applies on top of v7.1-rc2 and is also available via git: > > git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git irq-proc-v6 > > Thanks, > > tglx