From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4ED4EC41604 for ; Wed, 7 Oct 2020 15:55:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5215216C4 for ; Wed, 7 Oct 2020 15:55:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="CQwQZKzn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728222AbgJGPzS (ORCPT ); Wed, 7 Oct 2020 11:55:18 -0400 Received: from mail.zx2c4.com ([192.95.5.64]:32799 "EHLO mail.zx2c4.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726129AbgJGPzS (ORCPT ); Wed, 7 Oct 2020 11:55:18 -0400 Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 20c8e6c1 for ; Wed, 7 Oct 2020 15:22:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=zx2c4.com; h=mime-version :references:in-reply-to:from:date:message-id:subject:to :content-type; s=mail; bh=IzkKBgkAYb2SjNahiWJ7BabZwlg=; b=CQwQZK znfgG+lLHfROf0qBtaZVjm3u6X+jRcZsO1MVz50QaYJDFMdIo0liy7shw8Ex+ID/ bszSsAGG9PkC4XbajgEQtfpN+LPzUsELfJBLpuCQdsb0MtLOISG3ELh2rTDNilKX eVYeSBtVD4D7JQye0g2X5pi/d9Ld1aO2a53SSUIyBuwNY9AqXVmY/KkHltGodqnI cqqD4DnHBOncu5WZU79TbILa2kBYAymFn4GYDjTCsRXOylqkbhB3/e3YXLQw7UO5 fkTyDxdJVbhrHzD4ueniS643/0LfmEwox3A5Kqr7Ai9pj2IBhHa+GwWUPeuOnLU8 fmB4LD0e56y7CaHw== Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 3ab80e33 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO) for ; Wed, 7 Oct 2020 15:22:36 +0000 (UTC) Received: by mail-io1-f43.google.com with SMTP id n6so2828199ioc.12 for ; Wed, 07 Oct 2020 08:55:15 -0700 (PDT) X-Gm-Message-State: AOAM530ItwJh5eGWwMMe9ZRlyDeiyiSkCljWFNn+eURjASZXmywqowHS YO6+aEyCDVXdloGYGUKoR2ZxSNVVlROxdSo/wIA= X-Google-Smtp-Source: ABdhPJzBTQC9Ja1J0AfMdiYWxLJlnNn5p9MR4dmSFwd4hQQJhKfzCk2xre4E91IFXuIVNRBlM/iSgsDtmJfWs62Nx2A= X-Received: by 2002:a5d:8787:: with SMTP id f7mr2807973ion.79.1602086114464; Wed, 07 Oct 2020 08:55:14 -0700 (PDT) MIME-Version: 1.0 References: <5bd2bb9d925cfc81392bd9bf93b31ce4fd81e107.camel@redhat.com> <20200930225046.173190-1-Jason@zx2c4.com> <20200930225046.173190-3-Jason@zx2c4.com> In-Reply-To: <20200930225046.173190-3-Jason@zx2c4.com> From: "Jason A. Donenfeld" Date: Wed, 7 Oct 2020 17:55:03 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v3 2/2] Input: synaptics - enable InterTouch for ThinkPad P1/X1E gen 2 To: linux-input@vger.kernel.org, Vincent Huang , Lyude Paul , Dmitry Torokhov , Jiri Kosina , Andrew Duggan , Hans de Goede , Benjamin Tissoires , Chris Heiny , Sultan Alsawaf Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Oddly, CPU usage seems exceedingly high when using the trackpoint, in the rmi4 irq handler. Running perf-top indicates a hotspot in i801_access calling "in (%dx),%al", which makes sense. I wonder: is this a culprit of expensive accesses in general, which Sultan (CC'd) has been working on? Or are we hitting something different here? Improper IRQ masking in the i801 code? Jason