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=-9.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=unavailable 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 74C44C433E6 for ; Mon, 15 Feb 2021 17:41:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4CB8764DEC for ; Mon, 15 Feb 2021 17:41:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231551AbhBORlq (ORCPT ); Mon, 15 Feb 2021 12:41:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232243AbhBORLV (ORCPT ); Mon, 15 Feb 2021 12:11:21 -0500 Received: from mail-ed1-x530.google.com (mail-ed1-x530.google.com [IPv6:2a00:1450:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AD556C061756; Mon, 15 Feb 2021 09:10:41 -0800 (PST) Received: by mail-ed1-x530.google.com with SMTP id y18so8911093edw.13; Mon, 15 Feb 2021 09:10:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:subject:from:to:cc:date:in-reply-to:references :mime-version:content-transfer-encoding; bh=JWbg4DdogtY10SwmZ8bb0CjcoeVc39azJNWP/xOX164=; b=puO2K3XWd5kb9NbElyzyfrAMT2M3zd0UhnUTNNEsw8FKcGLucfIpjz1ueg1z2zJjzb 0mIwkXHVbAYdgpDVN4T9sLutpaO5v3ERaI/aXta/Cf0BujlCKyitHjzUlh0l9/mj9iD5 Stap20ZTAOumCy+UqeLM3bbENm0/VdjQYB7HbLcq1AG0TQQkJcL4jZvcf3FepvLNQbIA 6s2iR6dmLkrQ6m6dfx3QWCippaEq2BleVJKTEaw0MfPzSWTBf6SpYgXwsCw0q10NlQ03 ex3QfAgY9W2TTnFTinz4knB++5tI8SwXWz+cGlh0iBygoiX1PtzsROSBGOtMJYKnLz83 aDjw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:mime-version:content-transfer-encoding; bh=JWbg4DdogtY10SwmZ8bb0CjcoeVc39azJNWP/xOX164=; b=CCBOtyEWXvNsnmbvn9A0T3OnTAHLCe/8GzSuU7Uks/Q0cMiDlAJdXYlywnQupXWOmw W1JZt3pbuLsNRCtE0PNiWe0aqaJt88721ZLMq94Kh4qlBZr3YnCCWcHV361xmHHZ5d4P i95qPbRUVZE4ywEbzOxji2CZE8ck9XdgyF2Lj4miBo3GXc1hZ44ic7gFC0vdR0s8zOdK j3k42VkbzcB3WiEOU7elD/Fk6Cip7ckXFGsVyB1oYWXpunzgKmYhdWp4verjRB3rwHIj 44E9Dd2q8Nty81gnv7/eYmx5AvrLHdcG/dkSSyQIgouk5HEQu7CV57VtyvgUnk36wh5G 2f0A== X-Gm-Message-State: AOAM532dy+Yyhv5DL7Lfqi5uvtN9sXZMCjC2M73loL56HaaKnIXctIhb IVOY+zAdBZtwB553Phy0IO8= X-Google-Smtp-Source: ABdhPJxq/Z3u6ekwwlv5xWqUgmffSZrAWiyR+7ogVmEhnbl52TS0gaV5eSYOGO4vbJHVxoQ+XjEG7g== X-Received: by 2002:a50:9e62:: with SMTP id z89mr15972050ede.79.1613409040460; Mon, 15 Feb 2021 09:10:40 -0800 (PST) Received: from ubuntu-laptop (ip5f5bec65.dynamic.kabel-deutschland.de. [95.91.236.101]) by smtp.googlemail.com with ESMTPSA id df15sm10585308edb.24.2021.02.15.09.10.39 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Mon, 15 Feb 2021 09:10:40 -0800 (PST) Message-ID: Subject: Re: [PATCH V2 4/4] scsi: ufs-debugfs: Add user-defined exception event rate limiting From: Bean Huo To: Adrian Hunter , "Martin K . Petersen" , "James E . J . Bottomley" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Alim Akhtar , Avri Altman , Can Guo , Stanley Chu Date: Mon, 15 Feb 2021 18:10:39 +0100 In-Reply-To: <20210209062437.6954-5-adrian.hunter@intel.com> References: <20210209062437.6954-1-adrian.hunter@intel.com> <20210209062437.6954-5-adrian.hunter@intel.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2021-02-09 at 08:24 +0200, Adrian Hunter wrote: > An enabled user-specified exception event that does not clear quickly > will > repeatedly cause the handler to run. That could unduly disturb the > driver > behaviour being tested or debugged. To prevent that add debugfs file > exception_event_rate_limit_ms. When a exception event happens, it is > disabled, and then after a period of time (default 20ms) the > exception > event is enabled again. > > Note that if the driver also has that exception event enabled, it > will not > be disabled. > > Signed-off-by: Adrian Hunter Acked-by: Bean Huo