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[134.2.85.21]) by smtp.gmail.com with ESMTPSA id l15-v6sm11144182wrb.85.2018.04.23.03.24.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Apr 2018 03:24:53 -0700 (PDT) From: Christian Brauner To: ebiederm@xmission.com, davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: avagin@virtuozzo.com, ktkhai@virtuozzo.com, serge@hallyn.com, gregkh@linuxfoundation.org, Christian Brauner Subject: [PATCH net-next 0/2 v1] netns: uevent performance tweaks Date: Mon, 23 Apr 2018 12:24:41 +0200 Message-Id: <20180423102443.16627-1-christian.brauner@ubuntu.com> X-Mailer: git-send-email 2.17.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey everyone, This is v1 of "netns: uevent performance tweaks". Like Eric requested, I did extensive testing that prove significant performance improvements when using per-netns uevent sequence numbers with decoupled locks. The results and test descriptions were added to the commit message of [PATCH 2/2 v1] netns: isolate seqnums to use per-netns locks. This series deals with a bunch of performance improvements when sending out uevents that have been extensively discussed here: https://lkml.org/lkml/2018/4/10/592 - Only record uevent sockets from network namespaces owned by the initial user namespace in the global uevent socket list. Eric, this is the exact patch we agreed upon in https://lkml.org/lkml/2018/4/10/592. A very detailed rationale is present in the commit message for [PATCH 1/2] netns: restrict uevents - Decouple the locking for network namespaces in the global uevent socket list from the locking for network namespaces not in the global uevent socket list. A very detailed rationale including performance test results is present in the commit message for [PATCH 2/2] netns: isolate seqnums to use per-netns locks Thanks! Christian Christian Brauner (2): netns: restrict uevents netns: isolate seqnums to use per-netns locks include/linux/kobject.h | 2 + include/net/net_namespace.h | 3 + kernel/ksysfs.c | 11 +++- lib/kobject_uevent.c | 122 ++++++++++++++++++++++++++++-------- net/core/net_namespace.c | 14 +++++ 5 files changed, 126 insertions(+), 26 deletions(-) -- 2.17.0