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nvme: disable fabrics SQ flow control when asked by the user

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As for now, we don't care about sq_head pointer updates anyway, so
at least allow the controller to micro-optimize by omiting this update.

Note that we will probably need to support it when a controller
that requires this comes along.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Sagi Grimberg
2018-11-19 14:11:15 -08:00
committed by Jens Axboe
parent 9b95d2fb85
commit 8154ed730b
2 changed files with 14 additions and 1 deletions
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2
drivers/nvme/host/fabrics.h
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@@ -58,6 +58,7 @@ enum {
NVMF_OPT_CTRL_LOSS_TMO = 1 << 11,
NVMF_OPT_HOST_ID = 1 << 12,
NVMF_OPT_DUP_CONNECT = 1 << 13,
NVMF_OPT_DISABLE_SQFLOW = 1 << 14,
};
/**
@@ -101,6 +102,7 @@ struct nvmf_ctrl_options {
unsigned int kato;
struct nvmf_host *host;
int max_reconnects;
bool disable_sqflow;
};
/*