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SubjectRe: [tip:timers/urgent] posix timers: fix RLIMIT_CPU && fork()

* Oleg Nesterov <oleg@redhat.com> wrote:

> On 03/23, Oleg Nesterov wrote:
> >
> > Commit-ID: 37bebc70d7ad4144c571d74500db3bb26ec0c0eb
> > Gitweb: http://git.kernel.org/tip/37bebc70d7ad4144c571d74500db3bb26ec0c0eb
> > Author: Oleg Nesterov <oleg@redhat.com>
> > AuthorDate: Mon, 23 Mar 2009 20:34:11 +0100
> > Committer: Ingo Molnar <mingo@elte.hu>
> > CommitDate: Mon, 23 Mar 2009 20:43:35 +0100
> >
> > posix timers: fix RLIMIT_CPU && fork()
> >
> > See http://bugzilla.kernel.org/show_bug.cgi?id=12911
> >
> > copy_signal() copies signal->rlim, but RLIMIT_CPU is "lost". Because
> > posix_cpu_timers_init_group() sets cputime_expires.prof_exp = 0 and thus
> > fastpath_timer_check() returns false unless we have other cpu timers.
> >
> > This is the minimal fix for 2.6.29 (tested) and 2.6.28. The patch is not
> > optimal,
>
> Ingo, please drop this patch, it is very suboptimal.

suboptimal why?

> My intent was to make the obviously correct patch for 2.6.29, but
> since it was already released I'll send another one.

Please send it - thanks.

Ingo


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