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Subject[PATCH v2 25/25] staging: lustre: ptlrpc: use current CPU instead of hardcoded 0
Date
From: Dmitry Eremin <dmitry.eremin@intel.com>

fix crash if CPU 0 disabled.

Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8710
Reviewed-on: https://review.whamcloud.com/23305
Reviewed-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
Changelog:

v1) New patch to address crash in ptlrpc

drivers/staging/lustre/lustre/ptlrpc/service.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
index 3fd8c74..8e74a45 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -421,7 +421,7 @@ static void ptlrpc_at_timer(struct timer_list *t)
* there are.
*/
/* weight is # of HTs */
- if (cpumask_weight(topology_sibling_cpumask(0)) > 1) {
+ if (cpumask_weight(topology_sibling_cpumask(smp_processor_id())) > 1) {
/* depress thread factor for hyper-thread */
factor = factor - (factor >> 1) + (factor >> 3);
}
@@ -2221,15 +2221,16 @@ static int ptlrpc_hr_main(void *arg)
struct ptlrpc_hr_thread *hrt = arg;
struct ptlrpc_hr_partition *hrp = hrt->hrt_partition;
LIST_HEAD(replies);
- char threadname[20];
int rc;

- snprintf(threadname, sizeof(threadname), "ptlrpc_hr%02d_%03d",
- hrp->hrp_cpt, hrt->hrt_id);
unshare_fs_struct();

rc = cfs_cpt_bind(ptlrpc_hr.hr_cpt_table, hrp->hrp_cpt);
if (rc != 0) {
+ char threadname[20];
+
+ snprintf(threadname, sizeof(threadname), "ptlrpc_hr%02d_%03d",
+ hrp->hrp_cpt, hrt->hrt_id);
CWARN("Failed to bind %s on CPT %d of CPT table %p: rc = %d\n",
threadname, hrp->hrp_cpt, ptlrpc_hr.hr_cpt_table, rc);
}
@@ -2528,7 +2529,7 @@ int ptlrpc_hr_init(void)

init_waitqueue_head(&ptlrpc_hr.hr_waitq);

- weight = cpumask_weight(topology_sibling_cpumask(0));
+ weight = cpumask_weight(topology_sibling_cpumask(smp_processor_id()));

cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
hrp->hrp_cpt = i;
--
1.8.3.1
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