Ubuntu 11.04 Kernel Configurations

Scott Ritchie scott at open-vote.org
Sat Mar 26 09:16:47 UTC 2011

On 03/25/2011 06:05 PM, Tim Gardner wrote:
> On 03/25/2011 05:49 PM, Scott Ritchie wrote:
>> On 03/24/2011 11:09 AM, Leann Ogasawara wrote:
>>> Hi All,
>>> With the Ubuntu 11.04 Beta-1 release approaching, the Ubuntu Kernel Team
>>> felt this would also be an appropriate time to advertise what we intend
>>> to be the final kernel configurations for all the main distro and ports
>>> kernel flavors.  The purpose is to expose the main configuration changes
>>> and provide pointers to the full configurations for those who are
>>> interested.  To aid in the comparison of kernel config changes from
>>> Ubuntu 10.10 (Maverick) to Ubuntu 11.04 (Natty) we have generated a
>>> delta report [1].  We have also posted the full Ubuntu 10.10 and Ubuntu
>>> 11.04 configurations for each flavor [2].
>>> Thanks,
>>> The Ubuntu Kernel Team
>>> [1] https://wiki.ubuntu.com/Kernel/Configs/MaverickToNatty
>>> [2] http://kernel.ubuntu.com/~kernel-ppa/configs
>> Perhaps this is an appropriate time to ask, since I've been trying to
>> ask for months now in mailing list/IRC but never apparently to the right
>> person...
>> Can the kernel team please raise the hard limit for file descriptors
>> (but keep the soft limit)?
>> https://bugs.launchpad.net/bugs/663090
>> I'm having real applications break from this, and the change shouldn't
>> affect any app that doesn't request it manually.
>> Thanks,
>> Scott Ritchie
> The initial hard limit value is not a CONFIG option, so the only way it
> can be changed is by carrying a patch in the kernel, something I would
> prefer not to do. This is the macro that initializes the hard limit:
> include/linux/fs.h:#define INR_OPEN 1024                /* Initial
> setting for nfile rlimits */
> What is the issue with having upstart set this limit early in the boot
> cycle? Won't all new processes inherit the modified limit?

Perhaps that's the best solution and I've been looking in the wrong
place.  I'm not an upstart person/core dev though so I'd really
appreciate if someone else took this one.

Scott Ritchie

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