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[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> X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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