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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C4B2C004D4 for ; Thu, 19 Jan 2023 21:22:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230262AbjASVWg (ORCPT ); Thu, 19 Jan 2023 16:22:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229716AbjASVVy (ORCPT ); Thu, 19 Jan 2023 16:21:54 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 90AEE9FDF1 for ; Thu, 19 Jan 2023 13:14:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674162857; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+iHY1JhHo7sNRnq5TCZlVvfIFAGkKRvvynfD4YQ8b9Q=; b=e9gw7VTO6MJ+RJsb5+3DY23c5/KTEBmw2oWCzF83bmh22SISlJJ0OBaJXuUOijNT2v4Uu5 fkmFQHa8EIcTRoPrwcQQhd3v6X/SBt7eg5kgFK655+UYGCXvKuI1mC2BbWCH6XWLSuqPLR tHflVHy+g4TFumvMrpCqD2GuO4x/aZI= Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-118-qxwh9TsgPp6Uq0cMYe1fiQ-1; Thu, 19 Jan 2023 16:14:15 -0500 X-MC-Unique: qxwh9TsgPp6Uq0cMYe1fiQ-1 Received: by mail-qt1-f199.google.com with SMTP id q26-20020ac8735a000000b003b63165d87cso1526430qtp.11 for ; Thu, 19 Jan 2023 13:14:15 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=+iHY1JhHo7sNRnq5TCZlVvfIFAGkKRvvynfD4YQ8b9Q=; b=aeft5xwhRdWwvOOVL05o1E28z1YZW5sir8P+1lnznpk9CsXwJQS0s2KawQ/Uz4oGDM tlP1Mp7mM8QSyD5zZWKR2F0exUCJ38JoxOnaOpzxzRQEuNJdW3+4TAFFW+LvIP8rWywp mOv2rW310J99lNLWOdHgOjPylhIM0YJqisa0y9Bldjd4AlL5RMs2vkvNW6UjIqJXufg/ ncWE826Qv00/YiACOf0ssUQ4Ado7Li+L3gwGxX7pgTfudv5SpKRWY95wffzVVIXzVDTD YCfdjCkAMpxittImmjEpddnP11iGS3htPvZ1W+117sKJ9RuzP8Mm59Atht16Dzqj4eTc Z+qA== X-Gm-Message-State: AFqh2kr/armB9vq+TTOOFbPuInnkaichfnU1HovMWblfKyN8WjhdkO5O mshOfcBmjEz6nGGsE8Aw4qaiEpqJ//YkSFG0VDwpuLskQrtDbohwAfmeSQYq7kDcLyK5PZFtiCM EWcb1A4nVPOKrIMCvzq8sE6Dx X-Received: by 2002:ad4:424f:0:b0:535:5a09:8312 with SMTP id l15-20020ad4424f000000b005355a098312mr3170020qvq.34.1674162855301; Thu, 19 Jan 2023 13:14:15 -0800 (PST) X-Google-Smtp-Source: AMrXdXt2pAh2PbL6ofFXjhTL8NCW+Ds/0+z/BXxNI16rcaTPJz1b1RTgCytbMYeE0N9f5zuezGPMrg== X-Received: by 2002:ad4:424f:0:b0:535:5a09:8312 with SMTP id l15-20020ad4424f000000b005355a098312mr3169995qvq.34.1674162855013; Thu, 19 Jan 2023 13:14:15 -0800 (PST) Received: from localhost (pool-71-184-142-128.bstnma.fios.verizon.net. [71.184.142.128]) by smtp.gmail.com with ESMTPSA id q44-20020a05620a2a6c00b006fc9fe67e34sm10705407qkp.81.2023.01.19.13.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Jan 2023 13:14:14 -0800 (PST) Date: Thu, 19 Jan 2023 16:14:14 -0500 From: Eric Chanudet To: Alexander Viro Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Alexander Larsson , Andrew Halaney Subject: Re: [RFC PATCH 0/1] fs/namespace: defer free_mount from namespace_unlock Message-ID: <20230119211414.qfkh3hrmupcynrrb@echanude> References: <20230119205521.497401-1-echanude@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230119205521.497401-1-echanude@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 19, 2023 at 03:55:20PM -0500, Eric Chanudet wrote: > We noticed a significant slow down when running a containers on an > Aarch64 system with the RT patch set using the following test: > [...] > With the following patch, namespace_unlock will queue up the resources > that needs to be released and defer the operation through call_rcu to > return without waiting for the grace period. I did not CC:linux-rt-users. Resending with them included, my apologies. -- Eric Chanudet