On Thu, Apr 30, 2015 at 12:33:03PM -0400, Steven Rostedt wrote:
> diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
> index 51435dbce9c4..dbaa1ce3f308 100644
> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -1660,6 +1660,12 @@ xfs_icsb_lock_all_counters(
> xfs_icsb_cnts_t *cntp;
> int i;
>
> + /*
> + * In PREEMPT_RT, preemption is not disabled here, and it
> + * must be to take the xfs_icsb_lock_cntr.
> + */
> + preempt_disable_rt();
> +
> for_each_online_cpu(i) {
> cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
> xfs_icsb_lock_cntr(cntp);
> @@ -1677,6 +1683,8 @@ xfs_icsb_unlock_all_counters(
> cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i);
> xfs_icsb_unlock_cntr(cntp);
> }
> +
> + preempt_enable_rt();
> }
The irony, this is distinctly non deterministic code you're putting
under a RT specific preempt_disable ;-)
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
