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---
date: 2006-10-31
footer: libibverbs
header: "Libibverbs Programmer's Manual"
layout: page
license: 'Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md'
section: 3
title: IBV_RESIZE_CQ
---
# NAME
ibv_resize_cq - resize a completion queue (CQ)
# SYNOPSIS
```c
#include <infiniband/verbs.h>
int ibv_resize_cq(struct ibv_cq *cq, int cqe);
```
# DESCRIPTION
**ibv_resize_cq()** resizes the completion queue (CQ) *cq* to have at least
*cqe* entries. *cqe* must be at least the number of unpolled entries in the CQ
*cq*. If *cqe* is a valid value less than the current CQ size,
**ibv_resize_cq()** may not do anything, since this function is only
guaranteed to resize the CQ to a size at least as big as the requested size.
# RETURN VALUE
**ibv_resize_cq()** returns 0 on success, or the value of errno on failure
(which indicates the failure reason).
# NOTES
**ibv_resize_cq()** may assign a CQ size greater than or equal to the
requested size. The cqe member of *cq* will be updated to the actual size.
# SEE ALSO
**ibv_create_cq**(3),
**ibv_destroy_cq**(3)
# AUTHOR
Dotan Barak <dotanba@gmail.com>
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