From: Liang Zhen <liang.zhen@xxxxxxxxx> ko2iblnd may retry too frequent for growing pools, all schedulers are spinning if another thread is in progress of allocating a new pool and can't finish right away because of high system load. Signed-off-by: Liang Zhen <liang.zhen@xxxxxxxxx> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7054 Reviewed-on: http://review.whamcloud.com/16470 Reviewed-by: Doug Oucharek <doug.s.oucharek@xxxxxxxxx> Reviewed-by: James Simmons <uja.ornl@xxxxxxxxx> Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> --- .../staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c | 20 ++++++++++++++++---- 1 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c index 135ccf1..0d32e65 100644 --- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c +++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.c @@ -1218,6 +1218,7 @@ static kib_hca_dev_t *kiblnd_current_hdev(kib_dev_t *dev) if (!(i++ % 50)) CDEBUG(D_NET, "%s: Wait for failover\n", dev->ibd_ifname); + set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(cfs_time_seconds(1) / 100); read_lock_irqsave(&kiblnd_data.kib_global_lock, flags); @@ -1684,6 +1685,9 @@ struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps) { struct list_head *node; kib_pool_t *pool; + unsigned int interval = 1; + unsigned long time_before; + unsigned int trips = 0; int rc; again: @@ -1709,9 +1713,15 @@ struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps) if (ps->ps_increasing) { /* another thread is allocating a new pool */ spin_unlock(&ps->ps_lock); - CDEBUG(D_NET, "Another thread is allocating new %s pool, waiting for her to complete\n", - ps->ps_name); - schedule(); + trips++; + CDEBUG(D_NET, "Another thread is allocating new %s pool, waiting %d HZs for her to complete. trips = %d\n", + ps->ps_name, interval, trips); + + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(interval); + if (interval < cfs_time_seconds(1)) + interval *= 2; + goto again; } @@ -1725,8 +1735,10 @@ struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps) spin_unlock(&ps->ps_lock); CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name); - + time_before = cfs_time_current(); rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool); + CDEBUG(D_NET, "ps_pool_create took %lu HZ to complete", + cfs_time_current() - time_before); spin_lock(&ps->ps_lock); ps->ps_increasing = 0; -- 1.7.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
