netdev - Re: [PATCH] RDSRDMA: Fix cleanup of rds_iw_mr

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Date:	Thu, 29 Sep 2011 11:51:47 -0700 (PDT)
From:	Venkat Venkatsubra <venkat.x.venkatsubra@...cle.com>
To:	<jonathan@....us>
Cc:	<netdev@...r.kernel.org>, <davem@...emloft.net>
Subject: Re: [PATCH] RDSRDMA: Fix cleanup of rds_iw_mr_pool

In the rds_iw_mr_pool struct the free_pinned field keeps track of
memory pinned by free MRs. While this field is incremented properly
upon allocation, it is never decremented upon unmapping. This would
cause the rds_rdma module to crash the kernel upon unloading, by
triggering the BUG_ON in the rds_iw_destroy_mr_pool function.

This change keeps track of the MRs that become unpinned, so that
free_pinned can be decremented appropriately.

Signed-off-by: Jonathan Lallinger <jonathan@....us>
Signed-off-by: Steve Wise <swise@....us>
---

Signed-off-by: Venkat Venkatsubra <venkat.x.venkatsubra@...cle.com>

Venkat
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