Re: [PATCH] O17int

[mru@users.sourceforge.net (Måns Rullgård)]

Con Kolivas <kernel@kolivas.org> writes:

>> > This patch prevents any single task from being able to starve the
>> > runqueue that it's on. This minimises the impact a poorly behaved
>> > application or a malicious one has on the rest of the system. If an
>>
>> I have to disagree.  Open a file of a few hundred lines in XEmacs and
>> do a regexp search for "^[> ]*-*\n\\([> ]*.*\n\\)*[> ]*foo".  The
>> system will more or less freeze.  It's a very nasty regexp, and it's
>> an error to try to use it, but it still shouldn't freeze the system.
>
> Reasonably sure this is a variation on the starvation which O17
> won't address.

Well, obviously.

I tried O17 minus 016.2-O16.3, and I don't get the problems, even with
X at nice 0.  Does that tell you anything.

> Please top/vmstat/profile this and I'll look into it. There is
> potential for starvation without using up full timeslices and this
> may be it.

I'll do when I boot a kernel that has the problem.

-- 
Måns Rullgård
mru@users.sf.net