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authorOleg Nesterov <oleg@redhat.com>2009-03-23 15:34:11 -0400
committerIngo Molnar <mingo@elte.hu>2009-03-23 15:43:35 -0400
commit37bebc70d7ad4144c571d74500db3bb26ec0c0eb (patch)
tree856ed72491c8e650dd4ad8f56d57bda4881fa231 /arch/powerpc/platforms
parentd56ffd38a93841a07c839a375049a56b51e9567c (diff)
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, we need further cleanups here. With this patch update_rlimit_cpu() is not really needed, but I don't think it should be removed. The proper fix (I think) is: - set_process_cpu_timer() should just start the cputimer->running logic (it does), no need to change cputime_expires.xxx_exp - posix_cpu_timers_init_group() should set ->running when needed - fastpath_timer_check() can check ->running instead of task_cputime_zero(signal->cputime_expires) Reported-by: Peter Lojkin <ia6432@inbox.ru> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Roland McGrath <roland@redhat.com> Cc: <stable@kernel.org> [for 2.6.29.x] LKML-Reference: <20090323193411.GA17514@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/platforms')
0 files changed, 0 insertions, 0 deletions