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authorNicholas Bellinger <nab@linux-iscsi.org>2013-11-05 16:16:12 -0500
committerNicholas Bellinger <nab@linux-iscsi.org>2013-11-06 15:48:22 -0500
commit95b60f078899a9680688bab909d02169e1fd632e (patch)
tree15af0172ede5d13a482e6d9cebca7a2ae8ab47d2 /drivers/target/iscsi
parent2dd1d53fe004cd3b1e93e96508cfe637e6e31ef5 (diff)
ib_isert: Add support for completion interrupt coalescing
This patch adds support for completion interrupt coalescing that allows only every ISERT_COMP_BATCH_COUNT (8) to set IB_SEND_SIGNALED, thus avoiding completion interrupts for every posted iser_tx_desc. The batch processing is done using a per isert_conn llist that once IB_SEND_SIGNALED has been set is saved to tx_desc->comp_llnode_batch, and completion processing of previously posted iser_tx_descs is done in a single shot from within isert_send_completion() code. Note this is only done for response PDUs from ISCSI_OP_SCSI_CMD, and all other control type of PDU responses will force an implicit batch drain to occur. Cc: Or Gerlitz <ogerlitz@mellanox.com> Cc: Sagi Grimberg <sagig@mellanox.com> Cc: Kent Overstreet <kmo@daterainc.com> Cc: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/iscsi')
0 files changed, 0 insertions, 0 deletions