Re: [PATCH v2] sg: add SG_FLAG_Q_AT_TAIL flag

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On Wed, Jun 04, 2014 at 10:58:30AM -0400, Douglas Gilbert wrote:
> When the SG_IO ioctl was copied into the block layer and
> later into the bsg driver, subtle differences emerged.
> 
> One difference is the way injected commands are queued through
> the block layer (i.e. this is not SCSI device queueing nor SATA
> NCQ). Summarizing:
>   - SG_IO in the block layer: blk_exec*(at_head=false)
>   - sg SG_IO: at_head=true
>   - bsg SG_IO: at_head=true
> 
> Some time ago Boaz Harrosh introduced a sg v4 flag called
> BSG_FLAG_Q_AT_TAIL to override the bsg driver default.
> This patch does the equivalent for the sg driver.

Looks good,

Reviewed-by: Christoph Hellwig <hch@xxxxxx>

Any chance to get a patch for the block-layer SG_IO code, too?

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