Re: counting file descriptors with a cgroup controller

On Wed, Mar 08, 2017 at 10:52:18AM +0100, Krzysztof Opasiak wrote: > Well detecting failures of open is not enough and it has couple of problems: > > 1) open(2) is not the only syscall which creates fd. In addition to other > syscalls like socket(2), dup(2), some ioctl() on drivers (for example

Re: counting file descriptors with a cgroup controller

On Wed, Mar 08, 2017 at 10:52:18AM +0100, Krzysztof Opasiak wrote: > Well detecting failures of open is not enough and it has couple of problems: > > 1) open(2) is not the only syscall which creates fd. In addition to other > syscalls like socket(2), dup(2), some ioctl() on drivers (for example

Re: counting file descriptors with a cgroup controller

Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: > Personally, I don't want to use rlimit for this as it ends up returning > error code from for example open() when we hit the limit. This may lead to > some unpredictable crashes in services (esp. those poor proprietary

Re: counting file descriptors with a cgroup controller

Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: > Personally, I don't want to use rlimit for this as it ends up returning > error code from for example open() when we hit the limit. This may lead to > some unpredictable crashes in services (esp. those poor proprietary

Re: counting file descriptors with a cgroup controller

On 03/07/2017 09:48 PM, Tejun Heo wrote: Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: Personally, I don't want to use rlimit for this as it ends up returning error code from for example open() when we hit the limit. This may lead to some unpredictable crashes in

Re: counting file descriptors with a cgroup controller

On 03/07/2017 09:48 PM, Tejun Heo wrote: Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: Personally, I don't want to use rlimit for this as it ends up returning error code from for example open() when we hit the limit. This may lead to some unpredictable crashes in

Re: counting file descriptors with a cgroup controller

On 03/08/2017 03:59 AM, Parav Pandit wrote: Hi, On Tue, Mar 7, 2017 at 2:48 PM, Tejun Heo wrote: Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: Personally, I don't want to use rlimit for this as it ends up returning error code from for example

Re: counting file descriptors with a cgroup controller

On 03/08/2017 03:59 AM, Parav Pandit wrote: Hi, On Tue, Mar 7, 2017 at 2:48 PM, Tejun Heo wrote: Hello, On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: Personally, I don't want to use rlimit for this as it ends up returning error code from for example open() when we

Re: counting file descriptors with a cgroup controller

Hi, On Tue, Mar 7, 2017 at 2:48 PM, Tejun Heo wrote: > > Hello, > > On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: > > Personally, I don't want to use rlimit for this as it ends up returning > > error code from for example open() when we hit the limit. This

Re: counting file descriptors with a cgroup controller

Hi, On Tue, Mar 7, 2017 at 2:48 PM, Tejun Heo wrote: > > Hello, > > On Tue, Mar 07, 2017 at 09:06:49PM +0100, Krzysztof Opasiak wrote: > > Personally, I don't want to use rlimit for this as it ends up returning > > error code from for example open() when we hit the limit. This may lead to > >

Re: counting file descriptors with a cgroup controller

On 03/07/2017 08:41 PM, Tejun Heo wrote: Hello, Krzysztof. On Tue, Mar 07, 2017 at 12:19:52PM +0100, Krzysztof Opasiak wrote: So maybe let me clarify our use case so we can have some more discussion about this. We are dealing with task of monitoring system services on an IoT system. So this

Re: counting file descriptors with a cgroup controller

On 03/07/2017 08:41 PM, Tejun Heo wrote: Hello, Krzysztof. On Tue, Mar 07, 2017 at 12:19:52PM +0100, Krzysztof Opasiak wrote: So maybe let me clarify our use case so we can have some more discussion about this. We are dealing with task of monitoring system services on an IoT system. So this

Re: counting file descriptors with a cgroup controller

Hello, Krzysztof. On Tue, Mar 07, 2017 at 12:19:52PM +0100, Krzysztof Opasiak wrote: > So maybe let me clarify our use case so we can have some more discussion > about this. We are dealing with task of monitoring system services on an IoT > system. So this system needs to run as long as possible

Re: counting file descriptors with a cgroup controller

Hello, Krzysztof. On Tue, Mar 07, 2017 at 12:19:52PM +0100, Krzysztof Opasiak wrote: > So maybe let me clarify our use case so we can have some more discussion > about this. We are dealing with task of monitoring system services on an IoT > system. So this system needs to run as long as possible

Re: counting file descriptors with a cgroup controller

Hi On 03/06/2017 07:58 PM, Tejun Heo wrote: Hello, On Fri, Feb 17, 2017 at 12:37:11PM +0100, Krzysztof Opasiak wrote: 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

Re: counting file descriptors with a cgroup controller

Hi On 03/06/2017 07:58 PM, Tejun Heo wrote: Hello, On Fri, Feb 17, 2017 at 12:37:11PM +0100, Krzysztof Opasiak wrote: 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

Re: counting file descriptors with a cgroup controller

Hello, On Fri, Feb 17, 2017 at 12:37:11PM +0100, Krzysztof Opasiak wrote: > > 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 >

Re: counting file descriptors with a cgroup controller

Hello, On Fri, Feb 17, 2017 at 12:37:11PM +0100, Krzysztof Opasiak wrote: > > 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 >

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.

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.

counting file descriptors with a cgroup controller

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

counting file descriptors with a cgroup controller

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