Use __vmalloc to allocate memory for mlx4_ib_wq.wrid and mlx4_ib_srq.wrid.
Several hits that the kmalloc for wrid failed with the following like
call back stack:
kworker/u:4: page allocation failure: order:4, mode:0x2000d0
Pid: 16388, comm: kworker/u:4 Not tainted
Call Trace:
[<ffffffff81134893>] warn_alloc_failed+0xf3/0x160
[<ffffffff811377fa>] ? __alloc_pages_direct_compact+0x1fa/0x200
[<ffffffff81137ca6>] __alloc_pages_slowpath+0x4a6/0x7b0
[<ffffffff811382ab>] __alloc_pages_nodemask+0x2fb/0x320
[<ffffffff8117c427>] kmem_getpages+0x67/0x1c0
[<ffffffff8117df27>] fallback_alloc+0x187/0x250
[<ffffffff8117dcea>] ____cache_alloc_node+0x9a/0x150
[<ffffffff8117eb2b>] __kmalloc+0x18b/0x340
[<ffffffffa031e8f1>] ? create_qp_common+0x431/0x8e0 [mlx4_ib]
[<ffffffffa031e8f1>] create_qp_common+0x431/0x8e0 [mlx4_ib]
[<ffffffffa031b6de>] ? kzalloc.clone.1+0xe/0x10 [mlx4_ib]
[<ffffffffa031efa7>] mlx4_ib_create_qp+0x207/0x310 [mlx4_ib]
[<ffffffffa02f6811>] ib_create_qp+0x41/0x1c0 [ib_core]
[<ffffffffa035f258>] ipoib_cm_create_tx_qp+0xc8/0x130 [ib_ipoib]
[<ffffffff811685e5>] ? __vmalloc_node+0x35/0x40
[<ffffffffa035f555>] ipoib_cm_tx_init+0x65/0x380 [ib_ipoib]
[<ffffffff8109801d>] ? sched_clock_cpu+0xcd/0x110
[<ffffffff81004ce0>] ? xen_mc_flush+0xb0/0x1b0
[<ffffffffa0363df0>] ipoib_cm_tx_start+0x230/0x3d0 [ib_ipoib]
[<ffffffff8107b900>] process_one_work+0x180/0x420
[<ffffffff8107d93e>] worker_thread+0x12e/0x390
[<ffffffff8107d810>] ? manage_workers+0x180/0x180
[<ffffffff81082c8e>] kthread+0xce/0xe0
[<ffffffff810038ce>] ? xen_end_context_switch+0x1e/0x30
[<ffffffff81082bc0>] ? kthread_freezable_should_stop+0x70/0x70
[<ffffffff8159c0ac>] ret_from_fork+0x7c/0xb0
[<ffffffff81082bc0>] ? kthread_freezable_should_stop+0x70/0x70
It needs 16 contigous pages and failed. At the time there actually is
100MB+ free memory:
Node 0 Normal: 10268*4kB (UM) 7443*8kB (UEM) 1647*16kB (UM) 35*32kB (UR)
1*64kB (R) 4*128kB (R) 1*256kB (R) 0*512kB 1*1024kB (R) 0*2048kB 0*4096kB =
129944kB
I also hit same errors order 3.
Signed-off-by: Wengang Wang <wen.gang.w...@oracle.com>
---
drivers/infiniband/hw/mlx4/qp.c | 15 +++++++++------
drivers/infiniband/hw/mlx4/srq.c | 6 ++++--
2 files changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 4ad9be3..754ceb9 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -34,6 +34,7 @@
#include <linux/log2.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
#include <rdma/ib_cache.h>
#include <rdma/ib_pack.h>
@@ -786,8 +787,10 @@ static int create_qp_common(struct mlx4_ib_dev *dev,
struct ib_pd *pd,
if (err)
goto err_mtt;
- qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof (u64), gfp);
- qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof (u64), gfp);
+ qp->sq.wrid = __vmalloc(qp->sq.wqe_cnt * sizeof(u64), gfp,
+ PAGE_KERNEL);
+ qp->rq.wrid = __vmalloc(qp->rq.wqe_cnt * sizeof(u64), gfp,
+ PAGE_KERNEL);
if (!qp->sq.wrid || !qp->rq.wrid) {
err = -ENOMEM;
goto err_wrid;
@@ -874,8 +877,8 @@ err_wrid:
if (qp_has_rq(init_attr))
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &qp->db);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ vfree(qp->sq.wrid);
+ vfree(qp->rq.wrid);
}
err_mtt:
@@ -1050,8 +1053,8 @@ static void destroy_qp_common(struct mlx4_ib_dev *dev,
struct mlx4_ib_qp *qp,
&qp->db);
ib_umem_release(qp->umem);
} else {
- kfree(qp->sq.wrid);
- kfree(qp->rq.wrid);
+ vfree(qp->sq.wrid);
+ vfree(qp->rq.wrid);
if (qp->mlx4_ib_qp_type & (MLX4_IB_QPT_PROXY_SMI_OWNER |
MLX4_IB_QPT_PROXY_SMI | MLX4_IB_QPT_PROXY_GSI))
free_proxy_bufs(&dev->ib_dev, qp);
diff --git a/drivers/infiniband/hw/mlx4/srq.c b/drivers/infiniband/hw/mlx4/srq.c
index dce5dfe..6d21bb2 100644
--- a/drivers/infiniband/hw/mlx4/srq.c
+++ b/drivers/infiniband/hw/mlx4/srq.c
@@ -34,6 +34,7 @@
#include <linux/mlx4/qp.h>
#include <linux/mlx4/srq.h>
#include <linux/slab.h>
+#include <linux/vmalloc.h>
#include "mlx4_ib.h"
#include "user.h"
@@ -170,7 +171,8 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
if (err)
goto err_mtt;
- srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
+ srq->wrid = __vmalloc(srq->msrq.max * sizeof(u64), GFP_KERNEL,
+ PAGE_KERNEL);
if (!srq->wrid) {
err = -ENOMEM;
goto err_mtt;
@@ -204,7 +206,7 @@ err_wrid:
if (pd->uobject)
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context),
&srq->db);
else
- kfree(srq->wrid);
+ vfree(srq->wrid);
err_mtt:
mlx4_mtt_cleanup(dev->dev, &srq->mtt);
--
2.1.0
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