Re: 3.14-rc2 XFS backtrace because irqs_disabled.

Oleg Nesterov
2014-02-13T18:37:39Z

On 02/13, Oleg Nesterov wrote:
>
> On 02/13, Linus Torvalds wrote:
> >
> > On Thu, Feb 13, 2014 at 9:40 AM, Oleg Nesterov <oleg@redhat.com> wrote:
> > >
> > > And we should be careful with SIGQUEUE_PREALLOC, at least
> > > collect_signal() should not do list_del_init()... Plus we need to
> > > handle the SEND_SIG_FORCED-like case.
> >
> > I don't think the users need to care. They'd just call
> > "sigqueue_free()" not knowing about our preallocations etc.
>
> Yes, but we need to be careful to avoid the races with
> release_posix_timer().

Plus we need to delay do_schedule_next_timer() as well. But this
is probably good because we can avoid unlock/lock(siglock) in
dequeue_signal().

Oleg.