** Changed in: linux (Ubuntu)
Status: Triaged => Won't Fix
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https://bugs.launchpad.net/bugs/182960
Title:
Please set memory limits by default
Status in linux package in Ubuntu:
Won't Fix
Bug description:
Accidental actions by a single user or program that tries to consume
all available memory can cause the system to start swapping and
becoming completely unusable. I just did this by accident and had to
hard reset.
Please set a default limit on the amount of memory available to a
single process. I think a default of some proportion of total system
memory would be sensible - say 75%. Except in special circumstances,
exceeding this sort of amount would cause the system to be unusable,
so it shouldn't impact the average user. Advanced users or those with
special requirements would be able to increase or remove the limit.
I'd make it a hard limit for security reasons so that multiple users
are protected from each other, but I would be happy if it was decided
to use a soft limit instead.
See bug 14505 for a discussion of this issue. I think it could be
resolved in the same way?
It's never been clear to me which combination of "data seg size", "max
memory size", "stack size" and "virtual memory" should be used. I have
always used just "virtual memory" and this has caught runaway
processes for me every time. Any opinions? I've never found any more
detailed documentation on the available limits apart from this.
I will happily write or modify an existing PAM module if this is how
you'd like it implemented.
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