Migrating SYSV Limits to rlimit ?

Migrating SYSV Limits to rlimit ?

[Francois - kml]

Hi,

Most distros sets their own shmmax/shmall values.
DB admins wants and usually sets large values for their processes.
Global limits means there's no guarantee, except the upper limit.

So I'm currently working on a patch moving sysv shm limits to rlimit, which 
would allow a finer grained tuning. Currently:
- Lower by default shmmax/shmall values (at least the mainline ones)
- Allow raising those limits through sysctl, privilegied /proc access or 
setrlimit w/CAP_SYS_RESOURCE
- Limit resources by user with the user accounting struct
- Set the initial values through Kconfig
- Bind of sysctl modifications to init's rlimit hard values

I'm looking for comments.
Is that something that could interest a specific branch ?

Refs: Bugzilla Bug 11381
Some discussion about it:
http://marc.info/?t=112315565600001&r=1&w=2

Francois

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