linux - linux

	Commit message (Collapse)	Author	Age	Files	Lines
*	iommu-common: rename iommu_pool_hash to iommu_hash_common	Sowmini Varadhan	2015-04-20	1	-3/+3
\| \| \| \| \| \| \| \| \| \| \| \| \| \|	When CONFIG_DEBUG_FORCE_WEAK_PER_CPU is set, the DEFINE_PER_CPU_SECTION macro will define an extern __pcpu_unique_##name variable that could conflict with the same definition in powerpc at this time. Avoid that conflict by renaming iommu_pool_hash in iommu-common.c Thanks to Guenter Roeck for catching this, and helping to test the fix. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
*	iommu-common: fix x86_64 compiler warnings	Sowmini Varadhan	2015-04-20	1	-7/+7
\| \| \| \| \| \| \| \| \| \|	Declare iommu_large_alloc as static. Remove extern definition for iommu_tbl_pool_init(). Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net>
*	iommu-common: Fix PARISC compile-time warnings	Sowmini Varadhan	2015-04-18	1	-1/+5
\| \| \| \| \| \| \| \| \|	Fixes warnings due to - no DMA_ERROR_CODE on PARISC, - sizeof (unsigned long) == 4 bytes on PARISC. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
*	Break up monolithic iommu table/lock into finer graularity pools and lock	Sowmini Varadhan	2015-04-18	1	-0/+266
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Investigation of multithreaded iperf experiments on an ethernet interface show the iommu->lock as the hottest lock identified by lockstat, with something of the order of 21M contentions out of 27M acquisitions, and an average wait time of 26 us for the lock. This is not efficient. A more scalable design is to follow the ppc model, where the iommu_map_table has multiple pools, each stretching over a segment of the map, and with a separate lock for each pool. This model allows for better parallelization of the iommu map search. This patch adds the iommu range alloc/free function infrastructure. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David S. Miller <davem@davemloft.net>
*	sparc: Revert generic IOMMU allocator.	David S. Miller	2015-04-18	1	-224/+0
\| \| \| \| \| \| \|	I applied the wrong version of this patch series, V4 instead of V10, due to a patchwork bundling snafu. Signed-off-by: David S. Miller <davem@davemloft.net>
*	iommu-common: Fix PARISC compile-time warnings	Sowmini Varadhan	2015-04-17	1	-1/+5
\| \| \| \| \| \| \| \| \|	Fixes warnings due to - no DMA_ERROR_CODE on PARISC, - sizeof (unsigned long) == 4 bytes on PARISC. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
*	sparc: Break up monolithic iommu table/lock into finer graularity pools and lock	Sowmini Varadhan	2015-04-16	1	-0/+220
	Investigation of multithreaded iperf experiments on an ethernet interface show the iommu->lock as the hottest lock identified by lockstat, with something of the order of 21M contentions out of 27M acquisitions, and an average wait time of 26 us for the lock. This is not efficient. A more scalable design is to follow the ppc model, where the iommu_table has multiple pools, each stretching over a segment of the map, and with a separate lock for each pool. This model allows for better parallelization of the iommu map search. This patch adds the iommu range alloc/free function infrastructure. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>