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IB/mlx4: Use vmalloc for WR buffers when needed

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There are several hits that WR buffer allocation(kmalloc) failed.
It failed at order 3 and/or 4 contigous pages allocation. At the same time
there are actually 100MB+ free memory but well fragmented.
So try vmalloc when kmalloc failed.

Signed-off-by: Wengang Wang <wen.gang.wang@oracle.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Wengang Wang
2015-10-08 13:27:04 +08:00
committed by Doug Ledford
parent 73d4da7b9f
commit 0ef2f05c7e
2 changed files with 21 additions and 9 deletions
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11
drivers/infiniband/hw/mlx4/srq.c
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@@ -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"
@@ -172,8 +173,12 @@ struct ib_srq *mlx4_ib_create_srq(struct ib_pd *pd,
srq->wrid = kmalloc(srq->msrq.max * sizeof (u64), GFP_KERNEL);
if (!srq->wrid) {
err = -ENOMEM;
goto err_mtt;
srq->wrid = __vmalloc(srq->msrq.max * sizeof(u64),
GFP_KERNEL, PAGE_KERNEL);
if (!srq->wrid) {
err = -ENOMEM;
goto err_mtt;
}
}
}
@@ -204,7 +209,7 @@ err_wrid:
if (pd->uobject)
mlx4_ib_db_unmap_user(to_mucontext(pd->uobject->context), &srq->db);
else
kfree(srq->wrid);
kvfree(srq->wrid);
err_mtt:
mlx4_mtt_cleanup(dev->dev, &srq->mtt);