[dm-devel] [PATCH 10/16] scsi: respect unchecked_isa_dma for blk-mq

[Hannes Reinecke]

On 01/23/2017 04:29 PM, Christoph Hellwig wrote:
> Currently blk-mq always allocates the sense buffer using normal GFP_KERNEL
> allocation.  Refactor the cmd pool code to split the cmd and sense allocation
> and share the code to allocate the sense buffers as well as the sense buffer
> slab caches between the legacy and blk-mq path.
> 
> Note that this switches to lazy allocation of the sense slab caches - the
> slab caches (not the actual allocations) won't be destroy until the scsi
> module is unloaded instead of keeping track of hosts using them.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> ---
>  drivers/scsi/hosts.c     |  4 ++++
>  drivers/scsi/scsi.c      | 24 ++++---------------
>  drivers/scsi/scsi_lib.c  | 62 +++++++++++++++++++++++++++++++++++++++++++++---
>  drivers/scsi/scsi_priv.h |  5 ++++
>  4 files changed, 73 insertions(+), 22 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare at suse.com>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		   Teamlead Storage & Networking
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