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Revision 85a64889492b45f931ddac87ec09d84aa7347ee1 authored by Jonathan Lallinger on 29 September 2011, 07:58:41 UTC, committed by David S. Miller on 29 September 2011, 18:57:19 UTC 
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@ogc.us>
Signed-off-by: Steve Wise <swise@ogc.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 605b91c
Raw File
Kconfig 

config CACHEFILES
	tristate "Filesystem caching on files"
	depends on FSCACHE && BLOCK
	help
	  This permits use of a mounted filesystem as a cache for other
	  filesystems - primarily networking filesystems - thus allowing fast
	  local disk to enhance the speed of slower devices.

	  See Documentation/filesystems/caching/cachefiles.txt for more
	  information.

config CACHEFILES_DEBUG
	bool "Debug CacheFiles"
	depends on CACHEFILES
	help
	  This permits debugging to be dynamically enabled in the filesystem
	  caching on files module.  If this is set, the debugging output may be
	  enabled by setting bits in /sys/modules/cachefiles/parameter/debug or
	  by including a debugging specifier in /etc/cachefilesd.conf.

config CACHEFILES_HISTOGRAM
	bool "Gather latency information on CacheFiles"
	depends on CACHEFILES && PROC_FS
	help

	  This option causes latency information to be gathered on CacheFiles
	  operation and exported through file:

		/proc/fs/cachefiles/histogram

	  The generation of this histogram adds a certain amount of overhead to
	  execution as there are a number of points at which data is gathered,
	  and on a multi-CPU system these may be on cachelines that keep
	  bouncing between CPUs.  On the other hand, the histogram may be
	  useful for debugging purposes.  Saying 'N' here is recommended.

	  See Documentation/filesystems/caching/cachefiles.txt for more
	  information.
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