On Mon, Feb 19, 2018 at 08:36:30AM +0900, Byungchul Park wrote:
> On 2/15/2018 6:42 AM, Paul E. McKenney wrote:
> >On Wed, Feb 14, 2018 at 05:59:54PM +0900, Byungchul Park wrote:
> >>We should've kept sp->srcu_gp_seq_needed_exp the furthest. But
> >>it probably fails because of the incorrect condition. Fix it.
> >>
> >>Signed-off-by: Byungchul Park <byungchul.p...@lge.com>
> >
> >Good catch, and thank you for reviewing the SRCU code, but Ildar Ismagilov
> >beat you to this one. Please see 574428dee1f3 ("rcu: Fix misprint in
> >srcu_funnel_exp_start") in -rcu.
>
> Hi Paul,
>
> I'm sorry I'm late. It's been Lunar New Year holiday since last
> thursday.
Not a problem!
> Do you mean:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
>
> Is this rcu's main dev-tree?
It is indeed!
> Thanks for replying anyway, and happy new year~
And a very happy Lunar New Year to you and yours!!!
Thanx, Paul
> >>---
> >> kernel/rcu/srcutree.c | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >>diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c
> >>index d5cea81..44bc0fa 100644
> >>--- a/kernel/rcu/srcutree.c
> >>+++ b/kernel/rcu/srcutree.c
> >>@@ -626,7 +626,7 @@ static void srcu_funnel_exp_start(struct srcu_struct
> >>*sp, struct srcu_node *snp,
> >> spin_unlock_irqrestore_rcu_node(snp, flags);
> >> }
> >> spin_lock_irqsave_rcu_node(sp, flags);
> >>- if (!ULONG_CMP_LT(sp->srcu_gp_seq_needed_exp, s))
> >>+ if (ULONG_CMP_LT(sp->srcu_gp_seq_needed_exp, s))
> >> sp->srcu_gp_seq_needed_exp = s;
> >> spin_unlock_irqrestore_rcu_node(sp, flags);
> >> }
> >>--
> >>1.9.1
> >>
> >
> >
>
> --
> Thanks,
> Byungchul
>
