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Message-id: <9a57890c-d9e9-5719-e155-ce1161795a02@samsung.com> Date: Fri, 17 Feb 2017 12:37:11 +0100 From: Krzysztof Opasiak <k.opasiak@...sung.com> To: tj@...nel.org, lizefan@...wei.com, hannes@...xchg.org Cc: Łukasz Stelmach <l.stelmach@...sung.com>, linux-kernel@...r.kernel.org, Karol Lewandowski <k.lewandowsk@...sung.com>, cgroups@...r.kernel.org Subject: Re: counting file descriptors with a cgroup controller + cgroups mailing list + cgroup maintainers On 02/17/2017 10:37 AM, Łukasz Stelmach wrote: > Hi, > > We need to limit and monitor the number of file descriptors processes > keep open. If a process exceeds certain limit we'd like to terminate it > and restart it or reboot the whole system. Currently the RLIMIT API > allows limiting the number of file descriptors but to achieve our goals > we'd need to make sure all programmes we run handle EMFILE errno > properly. That is why we consider developing a cgroup controller that > limits the number of open file descriptors of its members (similar to > memory controler). > > Any comments? Is there any alternative that: > > + does not require modifications of user-land code, > + enables other process (e.g. init) to be notified and apply policy. > > Kind regards, > -- Krzysztof Opasiak Samsung R&D Institute Poland Samsung Electronics
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