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| author | Mike Christie <michael.christie@oracle.com> | 2021-02-27 20:00:03 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-03-05 01:37:02 +0300 |
| commit | 415ccd9811da38aed04f54051c8ae87699c4e6c2 (patch) | |
| tree | 723d729ea97b90c40fec06062324c9c0d913673e /drivers/target/target_core_iblock.h | |
| parent | 302990ac3b1b1a2b7b66f59a5c88038a51fbe18e (diff) | |
| download | linux-415ccd9811da38aed04f54051c8ae87699c4e6c2.tar.xz | |
scsi: target: iblock: Add backend plug/unplug callouts
This patch adds plug/unplug callouts for iblock. For an initiator driver
like iSCSI which wants to pass multiple cmds to its xmit thread instead of
one cmd at a time, this increases IOPS by around 10% with vhost-scsi
(combined with the last patches we can see a total 40-50% increase). For
driver combos like tcm_loop and faster drivers like the iSER initiator, we
can still see IOPS increase by 20-30% when tcm_loop's nr_hw_queues setting
is also increased.
Link: https://lore.kernel.org/r/20210227170006.5077-23-michael.christie@oracle.com
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target/target_core_iblock.h')
| -rw-r--r-- | drivers/target/target_core_iblock.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/target/target_core_iblock.h b/drivers/target/target_core_iblock.h index cefc641145b3..8c55375d2f75 100644 --- a/drivers/target/target_core_iblock.h +++ b/drivers/target/target_core_iblock.h @@ -4,6 +4,7 @@ #include <linux/atomic.h> #include <linux/refcount.h> +#include <linux/blkdev.h> #include <target/target_core_base.h> #define IBLOCK_VERSION "4.0" @@ -17,6 +18,14 @@ struct iblock_req { #define IBDF_HAS_UDEV_PATH 0x01 +#define IBD_PLUGF_PLUGGED 0x01 + +struct iblock_dev_plug { + struct se_dev_plug se_plug; + struct blk_plug blk_plug; + unsigned long flags; +}; + struct iblock_dev { struct se_device dev; unsigned char ibd_udev_path[SE_UDEV_PATH_LEN]; @@ -24,6 +33,7 @@ struct iblock_dev { struct bio_set ibd_bio_set; struct block_device *ibd_bd; bool ibd_readonly; + struct iblock_dev_plug *ibd_plug; } ____cacheline_aligned; #endif /* TARGET_CORE_IBLOCK_H */ |