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authorSagi Grimberg <sagig@mellanox.com>2015-10-13 19:12:58 +0300
committerDoug Ledford <dledford@redhat.com>2015-10-28 19:26:06 +0300
commitdd0107a08996c0ab8cac2b98ddbed5313e118e81 (patch)
tree1248e196a4cfc38d3c06b736171249e395e19fe7 /drivers/infiniband/ulp/iser/iscsi_iser.h
parent6c760b3dd576329e776b353f2eaefbe2034361b9 (diff)
downloadlinux-dd0107a08996c0ab8cac2b98ddbed5313e118e81.tar.xz
IB/iser: set block queue_virt_boundary
The block layer can reliably guarantee that SG lists won't contain gaps (page unaligned) if a driver set the queue virt_boundary. With this setting the block layer will: - refuse merges if bios are not aligned to the virtual boundary - split bios/requests that are not aligned to the virtual boundary - or, bounce buffer SG_IOs that are not aligned to the virtual boundary Since iser is working in 4K page size, set the virt_boundary to 4K pages. With this setting, we can now safely remove the bounce buffering logic in iser. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'drivers/infiniband/ulp/iser/iscsi_iser.h')
-rw-r--r--drivers/infiniband/ulp/iser/iscsi_iser.h7
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/infiniband/ulp/iser/iscsi_iser.h b/drivers/infiniband/ulp/iser/iscsi_iser.h
index a5edd6ede692..d8bbad9eb59b 100644
--- a/drivers/infiniband/ulp/iser/iscsi_iser.h
+++ b/drivers/infiniband/ulp/iser/iscsi_iser.h
@@ -227,18 +227,13 @@ enum iser_data_dir {
* @size: num entries of this sg
* @data_len: total beffer byte len
* @dma_nents: returned by dma_map_sg
- * @orig_sg: pointer to the original sg list (in case
- * we used a copy)
- * @orig_size: num entris of orig sg list
*/
struct iser_data_buf {
struct scatterlist *sg;
unsigned int size;
unsigned long data_len;
unsigned int dma_nents;
- struct scatterlist *orig_sg;
- unsigned int orig_size;
- };
+};
/* fwd declarations */
struct iser_device;